| assay of nitrogenase activity in intact plant systems. | nitrogenase activity was assayed in intact system of cichorium intybus, a non-leguminous commercially cultivated crop, dahlia pinnata and helianthus annus, and taraxacum officinale, a common weed plant. the assay was made in fabricated cylinders which could accomodate pot with plants. in such kind of assay along with rhizosphere microflora, the nitrogen fixed by phyllosphere nitrogen fixing microflora could also be accounted, which otherwise was difficult to be accounted for. | 1975 | 1211718 |
| airborne contact dermatitis from compositae plants in northern india. | 60 patients (45 male and 15 female) with suspected airborne contact dermatitis from compositae (asteraceae) plants and 20 age-matched controls (15 male and 5 female) were investigated. patch tests were performed with ethanolic plant extracts of 4 compositae plants, parthenium hysterophorus, chrysanthemum morifolium, dahlia pinnata and tagetes indica, all prevalent in northern india. 55 (92%) patients showed positive patch tests, with 35 (64%) demonstrating positive tests to extracts of only 1 of ... | 1989 | 2805654 |
| [research on plant viruses. virus card ix: chlorotic vein banding of the dahlia (dahlia pinnata cav.)]. | | 1964 | 14221465 |
| [effects of drought stress on physiological and biochemical parameters of dahlia pinnata]. | taking dahlia pinnata 'fenxishi' as test material, this paper studied its leaf physiological and biochemical responses to different degrees of drought stress and re-watering. with the increasing extent and duration of drought stress, the leaf relative water content, water potential, and chlorophyll content of d. pinnata 'fenxishi' decreased significantly, leaf relative electric conductivity and malondialdehyde (mda) content had a significant increase, plasma membrane was damaged, and massive ion ... | 2011 | 21657020 |
| sequence analysis and genetic diversity of five new indian isolates of cucumber mosaic virus. | cucumber mosaic virus (cmv) is an important virus since it causes severe losses to many economically important crops worldwide. five new isolates of cmv were isolated from naturally infected hippeastrum hybridum, dahlia pinnata, hemerocallis fulva, acorus calamus and typhonium trilobatum plants, all exhibiting severe leaf mosaic symptoms. for molecular identification and sequence analyses, the complete coat protein (cp) gene of these isolates was amplified by rt-pcr. the resulting amplicons were ... | 2015 | 26666188 |
| contact dermatitis from dahlia pinnata. | | 1990 | 2149333 |
| identification of insecticidal constituents of the essential oils of dahlia pinnata cav. against sitophilus zeamais and sitophilus oryzae. | the aim of this research was to determine the chemical composition of the essential oils of dahlia pinnata, their insecticidal activity against sitophilus zeamais and sitophilusoryzae and to isolate insecticidal constituents. based on bioactivity-guided fractionation, active constituents were isolated and identified as d-limonene, 4-terpineol and α-terpineol. essential oils and active compounds tested exhibited contact toxicity, with ld50 values ranging from 132.48 to 828.79 μg/cm(2) against s. ... | 2015 | 25563135 |
| the development of phloem anastomoses between vascular bundles and their role in xylem regeneration after wounding in cucurbita and dahlia. | the differentiation of phloem anastomoses linking the longitudinal vascular bundles has been studied in stem internodes of cucurbita maxima duchesne, c. pepo l. and dahlia pinnata cav. these anastomoses comprise naturally occurring regenerative sieve tubes which redifferentiate from interfascicular parenchyma cells in the young internodes. in all three species, severing a vascular bundle in a young internode resulted in regeneration of xylem to form a curved by-pass immediately around the wound. ... | 1996 | 28321670 |
| [cloning and bioinformation analysis of flavone synthase ii gene of erigeron breviscapus]. | erigeron breviscapus is a medicinal plant with the most developmental potential in yunnan province, which is belongs to erigeron genus of compositae family. scutellarin, the main active component of erigeron breviscapus is one of flavone 7-o-glucuronide derivatives, its biosynthesis pathway is still not clear. | 2013 | 24199545 |
| effect of different growing media on the growth and development of dahlia (dahlia pinnata) under the agro-climatic condition of dera ismail khan. | an experiment was conducted to investigate the effect of different growing media on the growth and development of dahlia (dahlia pinnata). seven different growing media including sand, silt, leaf mold, sand + silt, sand + leaf mold, silt + leaf mold and sand + silt + leaf mold, were used to check the growth and development of dahlia in pots. the over all best performance was recorded in media sand + silt + leaf mold for almost all the parameters; plant height (42.08 cm), stem thickness (1.93 cm) ... | 2007 | 19090295 |