interactions between arbuscular mycorrhizae and heavy metals under sand culture experiment.a sand culture experiment was established to determine interactions between arbuscular mycorrhizae and heavy metals. mycorrhizal infection rates, spore densities, maize root and shoot weights, and heavy metal contents in maize were as indexes of responses of arbuscular mycorrhizal fungi (acaulospora laevis, glomus caledonium and glomus manihotis) to heavy metals (cu and cd). the mycorrhizal infection rates of g. caledonium were the highest among these three mycorrhizal fungi, but the sporulating ...200312688501
phylogeny of the glomerales and diversisporales (fungi: glomeromycota) from actin and elongation factor 1-alpha sequences.the arbuscular mycorrhizal (am) fungi have been elevated to the phylum glomeromycota based on a ribosomal gene phylogeny. in order to test this phylogeny, we amplified and sequenced small subunit ribosomal rna (ssurrna), actin and elongation factor 1 (ef1)-alpha gene fragments from single spores of acaulospora laevis, glomus caledonium, gigaspora margarita, and scutellospora dipurpurescens. sequence variation within and among spores of an isolate was low except for ssurrna in s. dipurpurescens, ...200314659552
red list plants: colonization by arbuscular mycorrhizal fungi and dark septate endophytes.since information concerning the mycorrhization of endangered plants is of major importance for their potential re-establishment, we determined the mycorrhizal status of serratula tinctoria (asteraceae), betonica officinalis (lamiaceae), drosera intermedia (droseraceae) and lycopodiella inundata (lycopodiaceae), occurring at one of two wetland sites (fen meadow and peat bog), which differed in soil ph and available p levels. root colonization by arbuscular mycorrhizal fungi (amf) and dark septat ...200415221579
evaluation, grafting success and field establishment of cashew rootstock as influenced by vam isolates of vesicular arbuscular mycorrhizal (vam) fungi were isolated from cashew rhizosphere soil of different cashew growing regions of south india. these seven isolates along with two more vam fungi namely acaulospora laevis and glomus mosseae, which were found to be better symbionts for cashew during our earlier study were used to study their effectiveness on the growth and nutrition of cashew rootstock ullal-1. four promising vam fungi were selected based on this study. rootstocks in ...200415587122
influence of inoculation with the endomycorrhizal fungi and trichoderma viride on morphological and physiological growth parameters of rauwolfia serpentina benth. ex. kurtz.two arbuscular mycorrhizal fungi, glomus mosseae and acaulospora laevis either alone or in combination with trichoderma viride showed the dependence of rauwolfia serpentina on endomycorrhizal fungi. after 60 days, g. mosseae singly or in combination with trichoderma viride showed enhanced height increment compared to control plants. maximum phosphorus content was shown by plants treated with g. mosseae plus t. viride (0.444 ± 2.62) in roots and (0.437 ± 4.71) in shoots. phosphorus content in roo ...201123729899
[influence of soil factors on species diversity of arbuscular mycorrhizal (am) fungi in stipa steppe of tibet plateau].this study was based on the isolation and identification of arbuscular mycorrhizal (am) fungi collected from the alpine stipa steppe of north tibet, and focused on the influence of soil texture, ph, organic matter, and available p on the spore density, isolation frequency, relative abundance, importance value, species diversity, and species evenness of the am fungi. in the rhizosphere soil of the steppe, a total of 15 species am fungi were isolated and identified, including 9 species of glomus, ...201020707110
arbuscular mycorrhizal fungi in chronically petroleum-contaminated soils in mexico and the effects of petroleum hydrocarbons on spore germination.arbuscular mycorrhizal fungi (amf) have been hypothesized to enhance plant adaptation and growth in petroleum-contaminated soils. nevertheless, neither amf-biodiversity under chronically petroleum-contaminated soils nor spore germination response to petroleum hydrocarbons has been well studied. chronically petroleum-contaminated rhizosphere soil and roots from echinochloa polystachya, citrus aurantifolia and c. aurantium were collected from activo cinco presidentes, tabasco, mexico. root coloniz ...200717910101
growth model for arbuscular mycorrhizal order to quantify the contribution of arbuscular mycorrhizal (am) fungi to plant phosphorus nutrition, the development and extent of the external fungal mycelium and its nutrient uptake capacity are of particular importance. we develop and analyse a model of the growth of am fungi associated with plant roots, suitable for describing mechanistically the effects of the fungi on solute uptake by plants. the model describes the development and distribution of the fungal mycelium in soil in terms ...200818077246
influence of liming, inoculum level and inoculum placement on root colonization of subterranean clover.arbuscular mycorrhizal (am) fungi differ in their response to soil ph. thus, change in soil ph may influence the relative abundance of mycorrhizal fungi inside roots. root colonization by two am fungi was studied in relation to addition of lime (caco3), quantity of inoculum and inoculum placement. addition of caco3 to an acid soil decreased the colonization of roots by acaulospora laevis but increased colonization by glomus invermaium when both fungi were present. in acid soil (ph 4.7), almost a ...200212466915
arbuscular mycorrhizal fungi mediated uptake of lanthanum in chinese milk vetch (astragalus sinicus l.).a glasshouse experiment was carried out to study the effect of mycorrhizal formation by gigaspora margarita, glomus intraradices or acaulospora laevis on plant growth and lanthanum (la) uptake of astragalus sinicus l. in soils spiked with la at five levels (0, 1, 5, 10 and 20 mg kg(-1)). la application decreased mycorrhizal infection frequency and activity of fungal succinate dehydrogenase and alkaline phosphatase. increasing la concentrations in soil led to increased la accumulation in tissues ...200717475308
soil salinity delays germination and limits growth of hyphae from propagules of arbuscular mycorrhizal fungi.colonisation of plant roots by some arbuscular mycorrhizal (am) fungi is reduced in the presence of sodium chloride (nacl), probably due to a direct effect of nacl on the fungi. however, there appear to be differences between the fungi in their ability to colonise plants in the presence of nacl. this experiment tested the hypothesis that propagules of different isolates and species of am fungi from saline and nonsaline soils would differ in their ability to germinate and grow in the presence of ...200616525784
production of aseptic spores of vesicular-arbuscular endophytes and their viability after chemical and physical stress.the survival of germinating spores of vesicular-arbuscular endophytes after treatments with oxidizing agents, antibiotics, moist heat, ultrasonic radiation, and ultraviolet radiation was compared with that of their contaminating microbes. spores of three species were rapidly decontaminated by treatment with 0.42% (wt/vol) chlorine available from 5.0% (wt/vol) chloramine-t at 30 degrees c for 20 to 40 min depending on the species and the soil from which they were extracted. this treatment did not ...198016345579
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