Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| interaction of meloidogyne naasi, pratylenchus penetrans, and tylenchorhynchus agri on creeping beentgrass. | the pathogenicity and interactions of meloidogyne naasi, pratylenchus penetrans, and tylenchorhynchus agri on 'toronto c-15' creeping bentgrass, agrostis palustris, was studied in a long-term greenhouse experiment. based on dry weights of roots and clippings, m. naasi alone and in all combinations with p. penetrans and t. agri was highly pathogenic to creeping bentgrass. p. penetrans and t. agri alone and in combination inhibited root growth but adversely affected top growth only when the two we ... | 1972 | 19319260 |
| changes in the ultrastructure of the gelatinous matrix of meloidogyne javanica during dehydration. | the fine structure of the gelatinous matrix of meloidogyne javanica in both moist and dry states was studied by means of chemical fixation and thin sectioning techniques and the freeze-etch method. the matrix consists of an irregular meshwork when hydrated and a uniform granular mass of much greater density when dehydrated. the spaces in the hydrated meshwork are presumed to contain water. the change from a hydrated to a dehydrated state is accompanied by an overall shrinkage and hardening of th ... | 1972 | 19319261 |
| influence of temperature on embryogenesis in meloidogyne javanica. | the optimum temperature for embryogenesis in meloidogyne javanica lies between 25 and 30 c. embryogenesis is slightly more rapid at 30 c (9-10 days), but more eggs complete development at 25 c (11-13 days). at temperatures of 25, 27.5, and 30 c, embryogenesis is about twice as rapid as at 20 c (23-25 days), and about four times as rapid as at 15 c (46-48 days). time-lapse studies showed that the thermal optimum is similar throughout the different stages of embryonic development. | 1972 | 19319268 |
| relative efficacy of selected volatile and nonvolatile nematicides for control of meloidogyne incognita on tobacco. | root-knot nematode control and tobacco yields in plots infested with meloidogyne incognita and treated with the nonvolatile nematicides, aldicarb, mocap (r), or nemacur (r) were greater than those on similar plots treated with volatile nematicides such as dd, dd + mencs, sd14647 or tetrachlorothiophene. root-knot control and tobacco yields in plots treated with carbofuran or dasanit (r) were eqtual to that obtained with dd + mencs, but less than that obtained with the other volatile soil nematic ... | 1973 | 19319289 |
| races of the barley root-knot nematode, meloidogyne naasi. i. characterization by host preference. | the host preferences of populations of meloidogyne naasi from england, california, illinois, kentucky and kansas were compared. among 22 plant species tested, most were hosts for isolates of all five populations; crabgrass was added to the list of known hosts. differential reactions of isolates on creeping bentgrass, curly dock, sorghum, and common chickweed demonstrated the existence of at least five physiological races within m. naasi. the known races are numerically designated and characteriz ... | 1973 | 19319294 |
| races of the barley root-knot nematode, meloidogyne naasi. ii. developmental rates. | the developmental rates of the five newly designated races of meloidogyne naasi were compared on barley, oat and sorghum. races 1, 2, 3 and 4 developed and reproduced on both barley and oat but not on sorghum. race 5 developed and reproduced readily on sorghum but poorly on oat. a more rapid rate of development of race 5 on both barley and sorghum than that of other races on barley demonstrated that race 5 has a shorter life cycle than do races 1-4. | 1973 | 19319295 |
| races of the barley root-knot nematode, meloidogyne naasi. iii. reproduction and pathogenicity on creeping bentgrass. | reproduction and pathogenicity of the five known races of meloidogyne naasi on two selections of creeping bentgrass were compared. toronto c-15 was a host for races 3, 4 and 5, whereas northmoor 9 supported reproduction of all five races. differences in susceptibility and population increase demonstrated that the races could be separated by degree of reproduction on the two selections. root weights generally were unaffected. based on cumulative dipping weights, all but race 1 were pathogenic on ... | 1973 | 19319296 |
| economics of root-knot nematode control on cotton by dbcp fumigant on the texas high plains. | 1973 | 19319302 | |
| pathogenicity of meloidogyne hapla to lettuce as affected by inoculum level, plant age at inoculation and temperature. | pathogenicity of meloidogyne hapla to lettuce was influenced by inoculum level, age of plant at inoculation and temperature. top weight of 'minetto' lettuce was reduced 32% when 2-week-old lettuce plants were each inoculated with five egg masses. higher inoculum levels did not further decrease top weight significantly. inoculation at seeding reduced top growth more than inoculation of 1-, 2- or 3-week-old seedlings. m. hapla reduced growth more at the intermediate (21.1 c night and 26.7 c day), ... | 1973 | 19319317 |
| effect of temperature on growth, development and reproduction of meloidogyne hapla in lettuce. | temperature was an important factor in growth, development and reproduction of meloidogyne hapla in lettuce. growth, as measured by increase in diameter of females, was not appreciably different at the intermediate (21.1 c night and 26.7 c day) and high (26.7 c night and 32.2 c day) temperature regimes, but was considerably less at the low temperature regime (15.5 c night and 21.1 c day) than at the two higher temperature regimes. second-stage female larvae developed into adults 14 days after in ... | 1973 | 19319319 |
| hatching of meloidogyne incognita eggs in the neutral carbohydrate fraction of root exudates of gnotobiotically grown alfalfa. | meloidogyne incognita eggs were hatched in soil sterilized by gamma kradiation and wetted with root exudates from alfalfa plants in different stages of development and subjected to various levels of clipping. carbohydrate components of the exudates were identified by gas chromatography-mass spectrometry. although significant stimulation of hatch was detected in exudates of seedling and flowering plants, the practical importance of the increase is doubtful as hatch in distilled water was always g ... | 1973 | 19319320 |
| the effects of soil salinity and meloidogyne javanica on tomato. | a non-sodic, non-saline sandy loam soil was salinized to anion-cation ratios similar to those naturally occurring in iraq and california. the interactions of saline soils (conductivities 4, 8, 12 and 16 mmhos/cm) with a moderately salt-tolerant plant (lycopersicon esculentum 'marimond') and a plant parasitic nematode (meloidogyne javanica) were investigated. plant parasitic nematodes were shown to be an important modifying influence within the plant environment, either accentuating or ameliorati ... | 1973 | 19319341 |
| efficacy of 1,2-dibromo-3-chloropropane for control of meloidogyne javanica as influenced by concentration, exposure time and rate of degradation. | laboratory experiments were conducted by applying 1,2-dibromo-3-chloropropane (dbcp) to sealed vials of soil infested with meloidogyne javanica. a minimum initial concentration of 0.25 mug of dbcp/g of oven-dry soil killed all nematodes within 35 days. a concentration of 1.0 mug/g killed all nematodes within 28 days. the rate of degradation of this chemical was determined by treatment of steamed and nonsteamed dry soil in open and sealed vials. extraction of tile chemical, followed by quantifica ... | 1973 | 19319345 |
| phenol accumulation related to resistance in tomato to infection by root-knot and lesion nematodes. | host-parasite relationships of meloidogyne incognita acrita and pratylenchus penetrans were compared on three closely related cultivars of tomato: 'nemared', resistant to root-knot nematodes; 'hawaii 7153', moderately resistant; and 'b-5', susceptible. root-knot nematode larvae induced typical galls on the roots of b-5; larvae that entered nemared were walled-off by necrotic cells; both reactions occurred in hawaii 7153. lesion nematodes caused surface lesions which were initially similar on all ... | 1973 | 19319346 |
| theratromyxa weberi, an amoeba predatory on plant-parasitic nematodes. | theratromyxa weberi, an amoeba, was isolated and cultured in the laboratory to determine the physical conditions that influence its predation on plant parasitic nematodes. in greenhouse tests, the amoeba was a poor biological control agent of the root-knot nematode, meloidogyne incognita. | 1973 | 19319347 |
| resistance to meloidogyne hapla in peanut. | two hundred thirty-five cultivated varieties, breeding lines and plant introductions of arachis hypogaea and 12 accessions of wild arachis spp. were tested for resistance to meloidogyne hapla. eight of the cultivated peanut lines were only moderately susceptible and four of the wild peanuts exhibited resistance. no resistance-breaking m. hapla populations were found among 10 geographical isolates tested. | 1973 | 19319351 |
| fine structure of cephalic sense organs in meloidogyne incognita males. | amphids, and the cephalic and labial papillae of meloidogyne incognita males were examined in detail by electron microscopy. each amphid basically consists of an amphidial gland, a nerve bundle and an amphidial duct. the gland is a broad microvillous organ with a narrow anterior process, which is closely associated with the amphidial duct. a posterior process of the gland contains secretory organelles and proceeds along the esophagus with the lateral cephalic nerve bundle. the nerve bundle penet ... | 1973 | 19319352 |
| resistance of cotton to the root-knot nematode, meloidogyne incognita. | cotton plants resistant to meloidogyne incognita had roots characterized by fewer and smaller galls, and females that produced fewer egg masses containing fewer eggs than did susceptible plants. many galls on resistant roots contained no nematodes at the time of examination. penetration of the resistant cultivar was equal to that of the susceptible cultivar and independent of the number of nematodes in the inoculum. fewer nematodes penetrated resistant or susceptible plants with eight leaves tha ... | 1974 | 19319358 |
| correlation of tobacco yield, value, and root-knot index with early-to-midseason, and postharvest meloidogyne population densities. | certain nematicidal treatments for the control of root knot of tobacco in six field experiments in north carolina were used to determine early, midseason, and postharvest densities of eggs and larvae of meloidogyne spp., postharvest root-knot indices, and crop yield and value. various statistical correlations showed that population densities determined 6-8 wk after transplanting were more indicative of treatment effectiveness than postharvest densities. logarithmic transformation of early and mi ... | 1974 | 19319371 |
| suppression of embryogenesis and hatching in meloidogyne javanica by thermal stress. | embryogenes is and hatching of eggs of meloidogyne javanica were suppressed by brief heat treatment (46 c for 10 min). the period of suppression or arrested development differs according to the stage of development of the nematode when heat treatment is applied. the effect on hatching is much more pronounced than on embryogenesis. | 1974 | 19319374 |
| symptomless resistance of alfalfa to meloidogyne incognita acrita. | penetration, development and migration of the cotton root-knot nematode, meloidogyne incognita acrita, in resistant and susceptible alfalfa varieties was compared. larvae entered both resistant and susceptible plants in approximately the same numbers. after 3 to 4 days, the number of larvae in resistant roots decreased sharply until at 7 days fewer than 5 larvae/seedling and no nematode development could be found. in susceptible roots, larvae became sedentary and developed normally; egg producti ... | 1970 | 19322284 |
| resistance of cucumis spp. to the root-knot nematode, meloidogyne incognita acrita. | the nature of resistance in cucumis ficifolius and c. metuliferus to the root-knot nematode, meloidogyne incognita acrita, was studied under greenhouse conditions. although as many larvae penetrated the roots of these species as those of the susceptible c. melo, few developed to the adult female stage. resistance in c. ficifolius and c. metuliferus was associated with hindrance of larval development beyond the second stage, delayed development of larvae to adults and stimulation toward maleness. ... | 1970 | 19322292 |
| pathogenicity of four root-knot nematode species to polianthes tuberosa. | 1970 | 19322296 | |
| histopathogenesis of galls induced by meloidogyne naasi in wheat roots. | histopathogenesis of galls induced by meloidogyne naasi in wheat roots was studied. large numbers of larvae penetrated wheat root tips within 24 hr; larvae migrated both inter- and intracellularly, causing cortical hypertrophy. giant cells were formed in the stele around the head of each nematode within 4 to 5 days. initial pathological alterations in giant cell formation consisted of hypertrophy of protophloem and protoxylem cells, their nuclei and nucleoli. giant ceils contained 2 to 8 agglome ... | 1970 | 19322304 |
| comparative disc-electrophoretic protein analyses of selected meloidogyne, ditylenchus, heterodera and aphelenchus spp. | disc-electrophoretic separation of soluble proteins from whole nematode homogenates yielded band profiles useful for distinguishing selected species of meloidogyne and ditylenchus, and the genera heterodera, and aphelenchus. certain protein bands were common to all the species of meloidogyne, whereas other bands were specific. meloidogyne spp. and heterodera glycines shared some protein similarities, but other genera differed distinctly. protein profiles of meloidogyne spp. were not significantl ... | 1970 | 19322314 |
| interactions between meloidogyne incognita, m. hapla, and pratylenchus brachyurus in tobacco. | in a greenhouse pot experiment on the pathogenicity and interactions of meloidogyne incognita, m. hapla and pratylenchus brachyurus on four cultivars o f tobacco the cultivars 'hicks' and 'nc 2326' were susceptible to each nematode and "nc 95' and 'nc 2512' resistant only to m. incognita.mean heights of susceptible plants were depressed but fresh weight of tops did not differ significantly. meloidogyne spp. increased fresh weight of susceptible (but not the resistant) roots.reproduction of m. in ... | 1970 | 19322321 |
| interaction of meloidogyne javanica and macrophomina phaseoli in kenaf root rot. | incidence and severity of root-rot caused by the fungus macrophomina phaseoli was increased in screenhouse-grown kenaf (hibiscus cannabinus l.) seedlings simultaneously infected by the nematode meloidogyne javanica. in seedlings inoculated at 5, 10 and 15 days of age, root rot lesions increased 70.3, 44.1 and 21.8%, and nematode penetration increased 49.0, 36.7, and 12.3% when both fungus and nematode were present. | 1971 | 19322338 |
| the rhizoctonia-meloidogyne disease complex in flue-cured tobacco. | if meloidogyne incognita preceded rhizoctonia solani by 10 days or 21 days in roots of greenhouse-grown tobacco plants, root rot was more extensive than when the nematode and fungus were introduced either simultaneously or separately or when r. solani was added after artificial wounding. histological examination of galled roots 72 days after inoculation with r. solani revealed extensive fungal colonization in the root-knot susceptible cultivar 'dixie bright 101' when m. incognita preceded r. sol ... | 1971 | 19322362 |
| nematodes parasitic on forest trees: iii. reproduction on selected hardwoods. | the host-parasite relationships of 13 species of plant parasitic nematodes and five species of hardwoods native to the southeastern united states were tested on greenhouse-grown tree seedlings for 6-10 months. criteria for parasitism were completion o f life cycle and population increase of nematodes. belonolaimus longicaudatus, helicotylenchus dihystera, scutellonema brachyurum and tylenchorhynchus claytoni parasitized and reproduced on three or more of the species tested. hoplolaimus galeatus ... | 1971 | 19322363 |
| influence of six varieties of cynodon on four meloidogyne spp. | two years of giant star grass, cynodon nlemluensis var. nlemfuensis, in a field plot markedly reduced the incidence of the root-knot nematodes. tomato planted following the grass showed very little or no root galling and the yield was thrice that of tomato planted on an adjacent field plot previously cropped to tomato. replicated greenhouse experiments indicated that six varieties of cynodon were resistant to root-knot nematode but it took up to 6 months of grass growth to appreciably lower the ... | 1971 | 19322377 |
| the hypersensitivity reaction of tomatoes resistant to meloidogyne incognita: reversal by cytokinins. | initiation of larval growth, induction of cell necrosis, and gall formation in the host were measured as criteria of resistance or susceptibility of tomato seedlings to the root-knot nematode, meloidogyne incognita (kofoid &white) chitwood. seedlings grown at 27 c on water agar containing additions were scored 3 or 4 days after infection.in the absence of exogenous plant growth regulatory substances, approximately 73% of larvae that entered roots of susceptible plants showed growth, none induced ... | 1969 | 19325655 |
| pathogenicity of four species of meloidogyne on three varieties of olive trees. | 'ascolano' and 'sevillano' olive trees, olea europaea l., were highly susceptible to meloidogyne javanica (trueb) chitwood, and growth of their tops was decreased greatly in tests in a glasshouse. roots of 'manzanillo' olive trees were galled moderately by m. javanica, and their tops weighed 6% less than those of noninoculated trees. 'manzanillo' olive is considered highly tolerant to m. javanica. 'ascolano' and 'manzanillo' olive trees were highly susceptible to m. incognita (kofoid &white) chi ... | 1969 | 19325664 |
| effect of meloidogyne incognita, m. hapla, and m. javanica on the severity of fusarium wilt of chrysanthemum. | rooted cuttings of chrysanthemum morifolium 'yellow delaware' (fusarium-susceptible) and 'white iceberg' (fusarium-resistant) were greenhouse-grown in: (i) non-infested soil; (ii) soil infested with fusarium oxysporum alone; (iii) soil infested with meloidogyne incognita, m. javanica or m. hapla; and (iv) each nematode separately plus the fungus. all nematode species infected roots of both cultivars and caused characteristic root-knot symptoms but did not appreciably affect growth meassured by p ... | 1969 | 19325666 |
| interrelationships between root-nodule bacteria, plant-parasitic nematodes and their leguminous host. | the effect of infection by meloidogyne javanica and heterodera trifolii on number, size, structure and efficiency of nodules formed by rhizobiurn trifolii on white clover roots was investigated. introduction of nematodes one week before, simultaneously, or one week following inoculation with rhizobium bacteria did not hinder nodule formation. nodule size did not differ between nematode-infected and nematode-free plants. formation of nodules on m. javanica galls and gall formation on the nodules ... | 1969 | 19325677 |
| the histochemical localization of several enzymes of soybeans infected with the root-knot nematode meloidogyne incognita acrita. | the sites of activity of alkaline phosphatase, acid phosphatase, esterase, peroxidase, adenosine triphosphatase, and cytochrome oxidase were demonstrated histochemically in fresh sections of 'lee' soybeans infected by the root-knot nematode meloidogyne incognita acrita. each of the six enzymes was more active at the sites of infection than in adjacent non-infected tissue. during the early stages of infection, an increase in enzyme activity was observed in several cells in the proximity of the li ... | 1969 | 19325688 |
| assignment of aegilops variabilis eig chromosomes and translocations carrying resistance to nematodes in wheat. | the allotetraploid species aegilops variabilis eig (2n = 28, uusvsv) belongs to the tribe triticeae and is closely related to wheat. one accession, ae. variabilis no. 1, was found to be resistant to the cereal cyst nematode (ccn) and the root-knot nematode (rkn). as the genetic variability for resistance to those two pests is limited within wheat, this accession was crossed to bread wheat. previous work enabled the development of two addition lines and two translocation lines carrying resistance ... | 2009 | 19370089 |
| the genomes of root-knot nematodes. | plant-parasitic nematodes are the most destructive group of plant pathogens worldwide and are extremely challenging to control. the recent completion of two root-knot nematode genomes opens the way for a comparative genomics approach to elucidate the success of these parasites. sequencing revealed that meloidogyne hapla, a diploid that reproduces by facultative, meiotic parthenogenesis, encodes approximately 14,200 genes in a compact, 54 mpb genome. indeed, this is the smallest metazoan genome c ... | 2009 | 19400640 |
| differing requirements for flavonoids during the formation of lateral roots, nodules and root knot nematode galls in medicago truncatula. | * in this study, we tested whether the organogenesis of symbiotic root nodules, lateral roots and root galls induced by parasitic root knot nematodes (meloidogyne javanica) was regulated by the presence of flavonoids in the roots of medicago truncatula. flavonoids accumulate in all three types of root organ, and have been hypothesized previously to be required for secondary root organogenesis because of their potential role as auxin transport regulators. * using rna interference to silence the f ... | 2009 | 19402878 |
| molecular and morphological characterization of an unusual meloidogyne arenaria population from traveler's tree, ravenala madagascariensis. | an unusual variant of meloidogyne arenaria was discovered on roots of a traveler's tree (ravenala madagascariensis) intended for display at a public arboretum in pennsylvania. the population aroused curiosity by the lack of visible galling on the roots of the infected plant, and the female vulval region was typically surrounded by egg sacs. most morphometrics of the population fit within the ranges reported for m. arenaria, with a mosaic of features in common with either m. platani or other trop ... | 2008 | 19440257 |
| alternate row placement is ineffective for cultural control of meloidogyne incognita in cotton. | the objective of this study was to determine if planting cotton into the space between the previous year's rows reduces crop loss due to meloidogyne incognita compared to planting in the same row every year. row placement had a significant (p </= 0.05) effect on nematode population levels only on 8 july 2005. plots receiving 1,3-dichloropropene plus aldicarb had lower nematode population levels than non-fumigated plots on 24 may and 8 july in 2005, but not in 2004. the effect of nematicide treat ... | 2008 | 19440259 |
| ecological relationships between meloidogyne spartinae and salt marsh grasses in connecticut. | healthy specimens of selected grasses were collected from salt marshes and grown in the greenhouse. plants were inoculated with meloidogyne spartinae to determine the host range of this nematode. after 12 weeks, spartina alterniflora plants formed root galls in response to infection and increased m. spartinae populations. spartina patens, spartina cynosuroides, juncus gerardii and distichlis spicata were non-hosts. in order to determine the natural distribution of m. spartinae in dieback areas, ... | 2008 | 19440262 |
| interaction of concurrent populations of meloidogyne partityla and mesocriconema xenoplax on pecan. | the effect of the interaction between meloidogyne partityla and mesocriconema xenoplax on nematode reproduction and vegetative growth of carya illinoinensis 'desirable' pecan was studied in field microplots. meloidogyne partityla suppressed reproduction of m. xenoplax, whereas the presence of m. xenoplax did not affect the population density of m. partityla second-stage juveniles in soil. above-ground tree growth, as measured by trunk diameter 32 months following inoculation, was reduced in the ... | 2008 | 19440263 |
| european corn borer (lepidoptera: crambidae) stalk tunneling on root-knot nematode (tylenchida: heteroderidae) fitness on corn. | greenhouse experiments were conducted in 2004-2006 to examine the reciprocal effects of aboveground herbivory by european corn borer, ostrinia nubilalis (hübner) (lepidoptera: crambidae), and belowground herbivory by root-knot nematode, meloidogyne incognita chitwood (tylenchida: heteroderidae), on one another at three corn, zea mays l., growth stages. two experiments were conducted to study the effect of aboveground herbivory by o. nubilalis on the number of m. incognita juvenile penetration/ro ... | 2009 | 19449640 |
| plant growth-promoting rhizobacteria, paenibacillus polymyxa and paenibacillus lentimorbus suppress disease complex caused by root-knot nematode and fusarium wilt fungus. | to screen and evaluate the biocontrol potential of paenibacillus strains against disease complex caused by meloidogyne incognita and fusarium oxysporum f. sp. lycopersici interactions. | 2009 | 19457027 |
| non-nematode-derived double-stranded rnas induce profound phenotypic changes in meloidogyne incognita and globodera pallida infective juveniles. | nine non-nematode-derived double-stranded rnas (dsrnas), designed for use as controls in rna interference (rnai) screens of neuropeptide targets, were found to induce aberrant phenotypes and an unexpected inhibitory effect on motility of root knot nematode meloidogyne incognita j2s following 24h soaks in 0.1 mg/ml dsrna; a simple soaking procedure which we have found to elicit profound knockdown of neuronal targets in globodera pallida j2s. we have established that this inhibitory phenomenon is ... | 2009 | 19482028 |
| nematicidal efficacy of mcw-2, a new nematicide of the fluoroalkenyl group, against the root-knot nematode meloidogyne javanica. | the small number of available nematicides and restrictions on the use of non-fumigant nematicides owing to high toxicity to human and non-target organisms hinder effective nematode control. the nematicidal efficacy of mcw-2, a new nematicide of the fluoroalkenyl group, was evaluated against the root-knot nematode meloidogyne javanica (treub.) chitwood. | 2009 | 19488996 |
| isolation of rna from laser-capture-microdissected giant cells at early differentiation stages suitable for differential transcriptome analysis. | plant organ gene expression profile analyses are complicated by the various cell types, and therefore transcription patterns, present in each organ. for example, each gall formed in roots following root knot nematode infection contains between four and eight specialized feeding cells (giant cells, gcs) embedded within hypertrophied root tissues. a recent goal in plant science has been the isolation of nematode feeding cell mrnas for subsequent gene expression analysis. by adapting current protoc ... | 2009 | 19523105 |
| virulence development and genetic polymorphism in meloidogyne incognita (kofoid & white) chitwood after prolonged exposure to sublethal concentrations of nematicides and continuous growing of resistant tomato cultivars. | the root-knot nematode, meloidogyne incognita (kofoid & white) chitwood, is an important plant pathogen damaging to tomato. continuous use of resistant tomato cultivars and nematicides for its effective management might lead to resistance break-up or nematicide failure. genetic variability and virulence in m. incognita on susceptible pusa ruby tomato were analysed by bioassay, esterase and dna polymorphism after a 5 year weekly exposure to carbofuran, carbosulfan, cadusafos and triazophos at 0.0 ... | 2009 | 19562824 |
| [changes of soil biological characters beneath greenhouse cucumber under different cultivation systems]. | a 3-year pot experiment with 8-year continuously cropped greenhouse cucumber soil was conducted to study the effects of different cultivation systems on the soil quality, soil nematode quantity, and crop yields. the third year' s data were taken into analysis. comparing with traditional cultivation system (two seasons planting cucumber with fallowing in summer) , planting leafy vegetable and garlic in summer increased the yields of the two crops and the soil microbial biomass carbon content, tot ... | 2009 | 19565763 |
| phenotypic and molecular evaluation of cotton hairy roots as a model system for studying nematode resistance. | agrobacterium rhizogenes-induced cotton (gossypium hirsutum l.) hairy roots were evaluated as a model system for studying molecular cotton-nematode interactions. hairy root cultures were developed from the root-knot nematode (rkn) (meloidogyne incognita [kofoid and white] chitwood, race 3)-resistant breeding line m315 and from the reniform nematode (rn) (rotylenchulus reniformis linford & oliveira)-resistant accession gb713 (g. barbadense l.) and compared to a nematode-susceptible culture derive ... | 2009 | 19578854 |
| the role of different inoculum levels of meloidogyne javanica juveniles on nematode reproduction and host response of peanut plant. | a pot experiment was conducted to determine the influence of three of inoculum levels (1000, 2000 and 3000 j2 pot(-1)) of meloidogyne javanica on nematode reproduction and host response of peanut plant cv. giza 4 under greenhouse conditions at 30 +/- 5 degrees c. in general, nematode reproduction and host damage were both affected by the initial inoculum levels. the greater reduction percentage of plant fresh (57.7%), shoot dry (38.82) and pods weights (52.59%) and nodules numbers (73.33%) were ... | 2009 | 19580011 |
| tobacco rattle virus mediates gene silencing in a plant parasitic root-knot nematode. | root-knot nematodes (rkns) are sedentary biotrophic parasites that induce the differentiation of root cells into feeding cells that provide the nematodes with the nutrients necessary for their development. the development of new control methods against rkns relies greatly on the functional analysis of genes that are crucial for the development of the pathogen or the success of parasitism. in the absence of genetic transformation, rna interference (rnai) allows for phenotype analysis of nematode ... | 2009 | 19625337 |
| short interfering rna-mediated gene silencing in globodera pallida and meloidogyne incognita infective stage juveniles. | the analysis of gene function through rna interference (rnai)-based reverse genetics in plant parasitic nematodes (ppns) remains inexplicably reliant on the use of long double-stranded rna (dsrna) silencing triggers; a practice inherently disadvantageous due to the introduction of superfluous dsrna sequence, increasing chances of aberrant or off-target gene silencing through interactions between nascent short interfering rnas (sirnas) and non-cognate mrna targets. recently, we have shown that no ... | 2010 | 19651131 |
| cytoskeleton reorganization, a key process in root-knot nematode-induced giant cell ontogenesis. | root-knot nematodes are plant parasitic worms that establish and maintain an intimate relationship with their host plants. rkn induce the redifferentiation of root cells into multinucleate and hypertrophied giant cells essential for nematode growth and reproduction. major rearrangements of the cytoskeleton occur during giant cell formation. we characterized the first plant candidate genes implicated in giant cell actin and microtubule cytoskeleton reorganization. we showed previously that formin ... | 2008 | 19704567 |
| modular architecture and evolution of the map-1 gene family in the root-knot nematode meloidogyne incognita. | in eukaryotes, repeat proteins (i.e. proteins that contain a tandem arrangement of repeated structural elements) are often considered as an extra source of variability, and gains and losses of repeats may be an important force driving the evolution and diversification of such proteins, that could allow fast adaptation to new environments. here, we report genomic sequences of the map-1 protein family from of the asexual, plant-parasitic nematode meloidogyne incognita. the encoded proteins exhibit ... | 2009 | 19787376 |
| actin-depolymerizing factor2-mediated actin dynamics are essential for root-knot nematode infection of arabidopsis. | reorganization of the actin and microtubule networks is known to occur in targeted vascular parenchymal root cells upon infection with the nematode meloidogyne incognita. here, we show that actin-depolymerizing factor (adf) is upregulated in the giant feeding cells of arabidopsis thaliana that develop upon nematode infection and that knockdown of a specific adf isotype inhibits nematode proliferation. analysis of the levels of transcript and the localization of seven adf genes shows that five ar ... | 2009 | 19794115 |
| determination of preferred ph for root-knot nematode aggregation using pluronic f-127 gel. | root-knot nematodes (meloidogyne spp.) are obligate endoparasites of a wide range of plant species. the infective stage is attracted strongly to and enters host roots at the zone of elongation, but the compounds responsible for this attraction have not been identified. we developed a simple assay to investigate nematode response to chemical gradients that uses pluronic f-127, a synthetic block copolymer that, as a 23% aqueous solution, forms a liquid at low temperature and a gel at room temperat ... | 2009 | 19838866 |
| clustering, haplotype diversity and locations of mic-3: a unique root-specific defense-related gene family in upland cotton (gossypium hirsutum l.). | mic-3 is a recently identified gene family shown to exhibit increased root-specific expression following nematode infection of cotton plants that are resistant to root-knot nematode. here, we cloned and sequenced mic-3 genes from selected diploid and tetraploid cotton species to reveal sequence differences at the molecular level and identify chromosomal locations of mic-3 genes in gossypium species. detailed sequence analysis and phylogenetic clustering of mic-3 genes indicated the presence of m ... | 2010 | 19862497 |
| jasmonic acid and tomato resistance to the root-knot nematode meloidogyne incognita. | 2016 | 19994787 | |
| nematodetoxic aurovertin-type metabolites from a root-knot nematode parasitic fungus pochonia chlamydosporia. | chemical investigation of one fungal strain p. chlamydosporia ymf 1.00613 isolated from root knots of tobacco infected by meloidogyne incognita led to the isolation and identification of four aurovertin-type metabolites, which include a new compound, aurovertin i (a1), and three known metabolites, aurovertins e, f and d (a2-a4). their structures were established by spectroscopic studies such as 1d- and 2d-nmr and ms analysis. aurovertin i (a1) is the first natural product with an aurovertin skel ... | 2010 | 20000774 |
| early transcriptomic events in microdissected arabidopsis nematode-induced giant cells. | root-knot nematodes differentiate highly specialized feeding cells in roots (giant cells, gcs), through poorly characterized mechanisms that include extensive transcriptional changes. while global transcriptome analyses have used galls, which are complex root structures that include gcs and surrounding tissues, no global gene expression changes specific to gcs have been described. we report on the differential transcriptome of gcs versus root vascular cells, induced in arabidopsis by meloidogyne ... | 2010 | 20003167 |
| heterologous expression of taro cystatin protects transgenic tomato against meloidogyne incognita infection by means of interfering sex determination and suppressing gall formation. | plant-parasitic nematodes are a major pest of many plant species and cause global economic loss. a phytocystatin gene, colocasia esculenta cysteine proteinase inhibitor (cecpi), isolated from a local taro kaosiang no. 1, and driven by a camv35s promoter was delivered into cln2468d, a heat-tolerant cultivar of tomato (solanum lycopersicum). when infected with meloidogyne incognita, one of root-knot nematode (rkn) species, transgenic t1 lines overexpressing cecpi suppressed gall formation as evide ... | 2010 | 20054551 |
| nematicidal activity of monoterpenoids against the root-knot nematode meloidogyne incognita. | abstract nematicidal activity of 22 monoterpenoids were evaluated in vitro and in pot experiments. twenty of the twenty-two monoterpenoids significantly reduced hatching, and 11 reduced j2 mobility of the root-knot nematode meloidogyne incognita at a concentration of 250 mg/liter. in general, compounds with hydroxyl and carbonyl groups exhibited higher nematicidal activity than other terpenoids. borneol, carveol, citral, geraniol, and alpha-terpineol showed the highest nematicidal activity among ... | 2010 | 20055654 |
| persistence and nematicidal efficacy of carbosulfan, cadusafos, phorate, and triazophos in soil and uptake by chickpea and tomato crops under tropical conditions. | the productivity of chickpea, cicer arietinum (l.), and tomato, solanum lycopersicum (l.), is adversely affected by root-knot nematode, meloidogyne species. nematode-resistant chickpea and tomato are lacking except for a few varieties and therefore grower demand is not met. the available nematicides, namely, carbosulfan, cadusafos, phorate, and triazophos, were, therefore evaluated for their efficacy and persistence in soil and crops to devise nematode management decisions. in alluvial soil, cad ... | 2010 | 20085277 |
| additive effects of plant expressed double-stranded rnas on root-knot nematode development. | ectopically expressed double-stranded rnas (dsrnas) have recently been shown to suppress parasitic success of meloidogyne spp. in plants. we have targeted two genes from the root-knot nematode meloidogyne incognita; a dual oxidase gene implicated in the tyrosine cross-linking of the developing cuticle and a subunit of signal peptidase, a protein complex required for the processing of secreted proteins. while these genes are involved in different aspects of nematode development, the phenotypic co ... | 2010 | 20100489 |
| effects of a novel pathogenesis-related class 10 (pr-10) protein from crotalaria pallida roots with papain inhibitory activity against root-knot nematode meloidogyne incognita. | a novel pathogenesis-related class 10 (pr-10) protein with papain inhibitory activity, named cppri, was purified from crotalaria pallida roots by ammonium sulfate precipitation followed by three reverse-phase high-performance liquid chromatographies (hplcs). cppri is made up of a single polypeptide chain with a m(r) of 15 kda, as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (sds-page). this protein exhibited a k(i) value of 1.8 x 10(-9) m and operates via a noncompetit ... | 2010 | 20199085 |
| purification, characterization and molecular cloning of a monocot mannose-binding lectin from remusatia vivipara with nematicidal activity. | a mannose-binding lectin (rvl) was purified from the tubers of remusatia vivipara, a monocot plant by single-step affinity chromatography on asialofetuin-sepharose 4b. rvl agglutinated only rabbit erythrocytes and was inhibited by mucin, asialomucin, asialofetuin and thyroglobulin. lectin activity was stable up to 80 degrees c and under wide range of ph (2.0-9.3). sds-page and gel filtration results showed the lectin is a homotetramer of mr 49.5 kda, but maldi analysis showed two distinct peaks ... | 2010 | 20213246 |
| pathogenicity of pochonia species on eggs of meloidogyne javanica. | among fungi, species of the genus pochonia batista & o.m. fonseca are considered as promising biological control agents with high potential to reduce root-knot nematode (rkn) and nematode populations. in this research we investigated fars province of iran for the presence of pochonia spp., compared pathogenicity of different pochonia species on eggs of rkn in vitro, and selected the best isolates for further studies. during 2004-2006, 128 soil samples of fields infested with cyst nematodes and 1 ... | 2010 | 20214908 |
| a study of the changes in quantitative activity of some enzymes in olive cultivars during the interaction between verticillium wilt and root-knot nematode. | second stage juvenile (j2) of root-knot nematode, meloidogyne javanica, and microsclerotia of verticilliosis, verticillium dahliae, were used as the source of inoculum for nematode and fungus respectively. one-year-old seedlings of olive cultivar, zard, roghani, koroneiki and manzanilla, were transplanted to pots containing 2000g of sterilized sandy loam soil. experiment was conducted in completely randomized design with 32 treatments and five replications. treatments were as follows: control, n ... | 2009 | 20222618 |
| a study of interaction between verticillium wilt verticillium dahliae and root-knot nematode meloidogyne javanica in olive cultivars. | second stage juvenile (j2) of root-knot nematode, meloidogyne javanica, and microsclerotia of verticillium wilt, verticillium dahliae, were used as the source of inoculum for nematode and fungus respectively. one-year-old seedlings of olive cultivars, zard, roghani, koroneiki and manzanilla, were transplanted to pots containing 2000g of sterilized sandy loam soil. experiment was conducted in completely randomized design with 32 treatments and five replications. treatments were as follows: contro ... | 2009 | 20222619 |
| management of root-knot nematode, meloidogyne incognita in carrot. | the root-knot nematode, meloidogyne incognito, remains to be one of the most important constraints in agricultural production worldwide. however, reports showed that root-knot nematode (rkn) population can be suppressed by addition of organic amendments. a greenhouse microplot experiment was conducted to determine if locally available organic amendments would reduce rkn population and improve the growth and yield of more susceptible and less susceptible carrot cultivars in comparison with the fa ... | 2009 | 20222624 |
| the relative susceptibility of 41 sweetpotato varieties, introductions, and seedlings to the root-knot nematode, heterodera marioni (cornu) goodey. | 1947 | 20296033 | |
| size of at(n) insertions in promoter region modulates gmhsp17.6-l mrna transcript levels. | during earlier experiments, an ssr molecular marker (176 soy hsp) showing high correlation (70%) with resistance/susceptibility to javanese root-knot nematode meloidogyne javanica was identified in soybean. after being sequenced, results indicated that the ssr 176 soy hsp marker was inserted in the promoter region of gmhsp17.6-l gene. it was also detected in this region that resistant genotypes presented insertions between at(31) and at(33) in size and susceptible genotypes, at(9). gmhsp17.6-l g ... | 2010 | 20300590 |
| nematicidal natural products from the aerial parts of rubus niveus. | studies on the aerial parts of rubus niveus yielded six known compounds, 3,5-dihydroxy benzoic acid c(7)h(6)o(4), (1), gallic acid c(7)h(6)o(5) (2), ethyl galactoside (3), oleanolic acid (4), beta-sitosterol (5) and 3-o-[beta-d-galactopyranosyl-(12)-d-glucopyranoside (6). besides this, a gallic acid derivative with methyl substitution was synthesised as tetramethyl gallate (3). together with this derivative, compounds 1, 2, the alcohol soluble, chloroform soluble and petroleum ether soluble extr ... | 2010 | 20306362 |
| biocatalytic amidation of carboxylic acids and their antinemic activity. | a series of novel n-alkyl substituted amides, synthesized by enzyme catalysis, were evaluated against root-knot nematode, meloidogyne incognita and found to have potential antinemic activity. the corresponding amides were prepared by the condensation of equimolar amounts of carboxylic acids with different alkyl amines in the presence of candida antarctica lipase at 60-90 degrees c in 16-20 h. the reactions were carried out in a non - solvent system without the use of any activating agents. all t ... | 2010 | 20390959 |
| identification of qtl in soybean underlying resistance to herbivory by japanese beetles (popillia japonica, newman). | soybean [glycine max (l.) merr.] was one of the most important legume crops in the world in 2010. japanese beetles (jb; popillia japonica, newman) in the us were an introduced and potentially damaging insect pest for soybean. jbs are likely to spread across the us if global warming occurs. resistance to jb in soybean was previously reported only in plant introductions. the aims here were to identify loci underlying resistance to jb herbivory in recombinant inbred lines (rils) derived from the cr ... | 2010 | 20458460 |
| nematicidal natural products from the aerial parts of buddleja crispa. | studies on the aerial parts of buddleja crispa yielded 13 known compounds, nonyl benzoate, hexyl p-hydroxy-cinnamate, ginipin, gardiol, 1-heptacosanol, steroidal galactoside (22 r)-stigmasta-7,9 (11)-dien-22 beta-ol-3beta-o-beta-d-galactopyranoside, 3-methoxy benzoic acid, beta-sitosterol and ursolic acid. besides this two iridoid galactosides buddlejosides a, buddlejosides b and a benzofuran-type sesquiterpene buddlejone have been isolated from the etoac fraction of b. crispa. together with the ... | 2010 | 20461624 |
| the tobacco cel7 gene promoter is auxin-responsive and locally induced in nematode feeding sites of heterologous plants. | summary: emerging evidence suggests that plant cell-wall-modifying enzymes induced by root-parasitic nematodes play important roles in feeding cell formation. we previously identified a tobacco endo-beta-1,4-glucanase (cellulase) gene, ntcel7, that was strongly induced in both root-knot and cyst nematode feeding cells. to characterize further the developmental and nematode-responsive regulation of ntcel7, we isolated the ntcel7 promoter and analysed its expression over a time course of nematode ... | 2007 | 20507511 |
| elevated co2 changes the interactions between nematode and tomato genotypes differing in the ja pathway. | interactions between the root-knot nematode meloidogyne incognita and three isogenic tomato (lycopersicon esculentum) genotypes were examined when plants were grown under ambient (370 ppm) and elevated (750 ppm) co2. we tested the hypothesis that, defence-recessive genotypes tend to allocate 'extra' carbon (relative to nitrogen) to growth under elevated co2, whereas defence-dominated genotypes allocate extra carbon to defence, and thereby increases the defence against nematodes. for all three ge ... | 2010 | 20519018 |
| feeding cell development by cyst and root-knot nematodes involves a similar early, local and transient activation of a specific auxin-inducible promoter element. | summary to study the role of the phytohormone auxin in nematode feeding cell induction and early development, the transcriptional regulation of the artificial auxin-responsive promoter element dr5 was monitored in arabidopsis thaliana roots infected with the cyst nematode heterodera schachtii or the root-knot nematode meloidogyne incognita. for both nematode species, a specific and strong activation of dr5::gusa was observed inside the initial feeding cells at 18 h post inoculation, pointing to ... | 2004 | 20565601 |
| the promoter of the arabidopsis thaliana cel1 endo-1,4-beta glucanase gene is differentially expressed in plant feeding cells induced by root-knot and cyst nematodes. | summary transgenic tobacco and arabidopsis thaliana carrying the arabidopsis endo-1,4-beta-glucanase (ec 3.2.1.4) cel1 promoter fused to the beta-glucuronidase (gus) reporter gene were infected with the root-knot nematode, meloidogyne incognita, and either the tobacco cyst nematode, globodera tabacum (tobacco), or beet cyst nematode, heterodera schachtii (arabidopsis). cel1-driven gus expression was detected in cell elongation zones of noninfected plants and within feeding sites (giant-cells) in ... | 2004 | 20565607 |
| use of solid-phase subtractive hybridization for the identification of parasitism gene candidates from the root-knot nematode meloidogyne incognita. | summary a solid-phase subtractive strategy was used to clone parasitism gene candidates (pgcs) expressed in the oesophageal gland cells of meloidogyne incognita. nematode intestinal first-strand cdna was synthesized directly on magnetic beads and used to enrich for gland-specific sequences by high stringency hybridization to gland-cell mrna. a gland-specific cdna library was created from the nonhybridizing gland-cell mrna by long-distance reverse transcription polymerase chain reaction. subtract ... | 2004 | 20565611 |
| two chorismate mutase genes from the root-knot nematode meloidogyne incognita. | summary parasitism genes encoding secretory proteins expressed in the oesophageal glands of phytoparasitic nematodes play critical roles in nematode invasion of host plants, establishment of feeding sites and suppression of host defences. two chorismate mutase (cm) genes potentially having a role in one or more of these processes were identified from a meloidogyne incognita oesophageal gland-cell subtractive cdna library. these m. incognita enzymes (designated as mi-cm-1 and mi-cm-2) with amino- ... | 2005 | 20565635 |
| the potato virus y m(s)n(r) nib-replicase is the elicitor of a veinal necrosis-hypersensitive response in root knot nematode resistant tobacco. | summary a root knot nematode resistance gene in nicotiana tabacum, rk, providing resistance to the nematode parasite meloidogyne incognita is tightly linked to, or is a pleiotropic gene with a veinal necrosis systemic hypersensitive response to infection by potato virus y (pvy) m(s)n(r). the single pvy m(s)n(r) open reading frame was sequenced and found to have 89% protein identity to pvy n. individual pvy m(s)n(r) polypeptides were deduced and the corresponding cdna were cloned into a potato vi ... | 2002 | 20569320 |
| a species-specific satellite dna family in the genome of the coffee root-knot nematode meloidogyne exigua: application to molecular diagnostics of the parasite. | summary a new bglii satellite dna has been isolated, cloned and sequenced from the coffee root-knot nematode, meloidogyne exigua (nematoda: tylenchida). it is represented as tandemly repeated sequences with a monomeric unit of 277 bp. the monomers are present at approximately 17 900 copies per haploid genome, and represent about 9.7% of the total genomic dna. twenty randomly chosen monomers have been sequenced. the deduced unambiguous consensus sequence is 277 bp long, and displays an a + t cont ... | 2002 | 20569350 |
| root-knot nematode parasitism and host response: molecular basis of a sophisticated interaction. | summary taxonomy: eukaryota; metazoa; nematoda; chromadorea; order tylenchida; tylenchoidea; heteroderidae; genus meloidogyne. physical properties: microscopic-non-segmented worms. meloidogyne species can reproduce by apomixis, facultative meiotic parthenogenesis or obligate mitotic parthenogenesis. obligate biotrophic parasites inducing the re-differentiation of plant cells into specialized feeding cells. hosts: meloidogyne spp. can infest more than 3000 plant species including vegetables, frui ... | 2003 | 20569382 |
| differential display analysis of gene expression in the cytoplasm of giant cells induced in tomato roots by meloidogyne javanica. | summary giant cells induced by root-knot nematodes are highly specialized cells which function as transfer cells and provide nutrients to support the growth and reproduction of the nematode. changes in the overall pattern of gene expression in giant cells occur during the formation and maintenance of the nematode feeding cells. differential display analysis has been carried out to detect changes in gene expression in giant cells induced in tomato roots by meloidogyne javanica, using mrna isolate ... | 2003 | 20569396 |
| post-transcriptional gene silencing of root-knot nematode in transformed soybean roots. | rnai constructs targeted to four different genes were examined to determine their efficacy to reduce galls formed by meloidogyne incognita in soybean roots. these genes have high similarity with essential soybean cyst nematode (heterodera glycines) and caenorhabditis elegans genes. transformed roots were challenged with m. incognita. two constructs, targeted to genes encoding tyrosine phosphatase (tp) and mitochondrial stress-70 protein precursor (msp), respectively, strongly interfered with m. ... | 2011 | 20599433 |
| ssr markers closely associated with genes for resistance to root-knot nematode on chromosomes 11 and 14 of upland cotton. | molecular markers closely linked to genes that confer a high level of resistance to root-knot nematode (rkn) [meloidogyne incognita (kofoid & white) chitwood] in cotton (gossypium hirsutum l.) germplasm derived from auburn 623 rnr would greatly facilitate cotton breeding programs. our objectives were to identify simple sequence repeat (ssr) markers linked to rkn resistance quantitative trait loci (qtl) and map these markers to specific chromosomes. we developed three recombinant inbred line (ril ... | 2010 | 20607210 |
| fine mapping qmi-c11 a major qtl controlling root-knot nematodes resistance in upland cotton. | the identification and utilization of a high-level of host plant resistance is the most effective and economical approach to control root-knot nematode (meloidogyne incognita). in an earlier study, we identified a major quantitative trait locus (qtl) for resistance to root-knot nematode in the m-120 rnr upland cotton line (gossypium hirsutum l.) of the auburn 623 rnr source. the qtl is located in a 12.9-cm interval flanked by the two ssr markers cir069 and cir316 on the distal segment of chromos ... | 2010 | 20680610 |
| the b-3 ethylene response factor mterf1-1 mediates resistance to a subset of root pathogens in medicago truncatula without adversely affecting symbiosis with rhizobia. | the fungal necrotrophic pathogen rhizoctonia solani is a significant constraint to a range of crops as diverse as cereals, canola, and legumes. despite wide-ranging germplasm screens in many of these crops, no strong genetic resistance has been identified, suggesting that alternative strategies to improve resistance are required. in this study, we characterize moderate resistance to r. solani anastomosis group 8 identified in medicago truncatula. the activity of the ethylene- and jasmonate-respo ... | 2010 | 20713618 |
| transcriptional profiling of root-knot nematode induced feeding sites in cowpea (vigna unguiculata l. walp.) using a soybean genome array. | the locus rk confers resistance against several species of root-knot nematodes (meloidogyne spp., rkn) in cowpea (vigna unguiculata). based on histological and reactive oxygen species (ros) profiles, rk confers a delayed but strong resistance mechanism without a hypersensitive reaction-mediated cell death process, which allows nematode development but blocks reproduction. | 2010 | 20723233 |
| proteomic and bioinformatic analysis of the root-knot nematode meloidogyne hapla: the basis for plant parasitism. | on the basis of the complete genome sequence of the root-knot nematode melodogyne hapla, we have deduced and annotated the entire proteome of this plant-parasite to create a database of 14,420 proteins. we have made this database, termed happep3, available from the superfamily repository of model organism proteomes (http://supfam.mrc-lmb.cam.ac.uk/superfamily). to experimentally confirm the happep3 assignments using proteomics, we applied a data-independent lc/ms(e) analysis to m. hapla protein ... | 2010 | 20804128 |
| comparison between nugen's wt-ovation pico and one-direct amplification systems. | differential gene expression between groups of homogenous cell types is a biological question whose time has come. rna can be extracted from small numbers of cells, such as those isolated by laser-capture microdissection, but the small amounts obtained often require amplification to enable whole genome transcriptome profiling by technologies such as microarray analysis and rna-seq. recently, advances in amplification procedures make amplification directly from whole cell lysates possible. the ai ... | 2010 | 20808643 |
| effect of meloidogyne incognita inoculum density and application rate of paecilomyces lilacinus strain 251 on biocontrol efficacy and colonization of egg masses analyzed by real-time quantitative pcr. | the fungal biocontrol agent, paecilomyces lilacinus strain 251 (pl251), was evaluated for its potential to control the root-knot nematode meloidogyne incognita on tomato at varying application rates and inoculum densities. conversely to previous studies, significant dose-response relationships could not be established. however, we demonstrated that a preplanting soil treatment with the lowest dose of commercially formulated pl251 (2 × 10(5) cfu/g soil) was already sufficient to reduce root galli ... | 2011 | 20822430 |
| differential gene expression in roots of nematode-resistant and -susceptible peanut (arachis hypogaea) cultivars in response to early stages of peanut root-knot nematode (meloidogyne arenaria) parasitization. | the peanut root-knot nematode (rkn, meloidogyne arenaria) can cause significant yield losses in cultivated peanut (arachis hypogaea). however, molecular events underlying successful rkn infection and host responses in peanut are sparsely understood. using suppression subtractive hybridization (ssh), cdna libraries, enriched with differentially expressed ests, were constructed from rkn-challenged root tissues in the pre-penetration and early infection stages from near-isogenic nematode-resistant ... | 2011 | 20863592 |
| nematicidal activity of a nonpathogenic biocontrol bacterium, pseudomonas chlororaphis o6. | bacterial culture filtrates of an aggressive rhizobacterium, pseudomonas chlororaphis o6, displayed strong nematicidal activity. the nematicidal activity of p. chlororaphis o6 was markedly reduced in the gacs mutant of p. chlororaphis o6 grown in the presence of glycine, but no reduction of nematicidal activity in the gacs mutant was noted in the absence of glycine. the results of bioassay with p. chlororaphis o6 mutants showed that phenazine and pyrrolnitrin production was not a major factor, b ... | 2010 | 20963417 |
| host-parasite relationships of the root-knot nematode, heterodera marioni; some effects of the host on the parasite. | 1946 | 21027516 | |
| peroxiredoxins from the plant parasitic root-knot nematode, meloidogyne incognita, are required for successful development within the host. | root-knot nematodes, meloidogyne spp., are sedentary biotrophic parasites which are able to infest > 2000 plant species. after root invasion they settle sedentarily inside the vascular cylinder and maintain a compatible interaction for up to 8 weeks. plant cells respond to pathogen attacks by producing reactive oxygen species (ros). these ros, in particular hydroperoxides, are important regulators of host-parasite interactions and partly govern the success or failure of disease. ros producing an ... | 2011 | 21145323 |
| coprinus comatus: a basidiomycete fungus forms novel spiny structures and infects nematode. | nematophagous basidiomycete fungi kill nematodes by trapping, endoparasitizing and producing toxin. in our studies coprinus comatus (o.f.müll. : fr.) pers. is found to be a nematode-destroying fungus; this fungus immobilizes, kills and uses free-living nematode panagrellus redivivus goodey and root-knot nematode meloidogyne arenaria neal. c. comatus produces an unusual structure designated spiny ball. set on a sporophore-like branch, the spiny ball is a burr-like structure assembled with a large ... | 2010 | 21148944 |