Two mungbean varieties, Guj~l and PIMS~1, differing in their productivity potential, were examined to investigate their photosynthetic system at various stages of growth in relation to yield with two different dates of sowing. Vertical leaves were found to be beneficial. On the other hand, excessive leaf area during the later stages of growth may be detrimental to yield. Lower LAD at seedling stage and overall high NAR values may be reflected in higher grain yield. NAR declined as season progressed and this, in turn, may be related with increase in LAI. The grain yield was considerably more at the first date of sowing as compared to second date of sowmg, the effect was being more pronounced in var. PIMS-1. Various environmental factors recorded at two different dates of sowing and at various stages of growth indicated that these factors may have influenced the yield potential at two different dates of sowing.
Background: Pre-sowing seed priming and foliar spraying with Plant Growth Regulators is an easy, low cost and low risk technique and also an alternative approach recently used to mitigate the effect of abiotic stresses in agricultural production.Methods: Seeds of Mung bean var. GAM-5 were primed and also foliar spraying at 30 DAS with CaCl2 2% and 1%, Cycocel 500, 1000 ppm, NAA 25, 50 ppm during summer season of 2015-16 and 2016-17.Result: The results indicated a significant improvement in morpho-physiological traits, growth parameters, biochemical constituents and thereby yield due to the application of PGRs. Seed priming with 2% CaCl2 followed by 1% foliar spraying at 30 DAS (T11) significantly improved most of morpho-physiological parameters viz., plant height, number of branches per plant, days to 50% flowering, maturity, leaf area, chlorophyll content, seed protein content, number of pods per plant, number of seeds per pod, test weight, pod length, yield per plant, yield per hectare, harvest index in green gram followed by the seed priming with Cycocel 1000 ppm followed by foliar spraying at 30 DAS (T13) and seed priming with NAA 50 ppm followed by foliar spraying at 30 DAS (T15). The treatment T11 was more efficient.
Alternaria burnsii, the pathogen responsible for cumin blight, was collected from diseased plant samples from North Gujarat. AB-01 showed maximum growth at 28 1C. Conidia ranged from 44.92 to 63.28 m in length and 10.84 to 24.36 m in width whereas beak length of conidia ranged from 20.34 to 47.85 m. The isolate AB-01 showed the highest sporulation frequency (1.24 10 5 /ml), but the highest percentage of disease intensity was observed in AB-08 (31.4). Internally transcribed spacer gene sequence based phylogenetic grouping using MEGA5.6 and the factorial analysis using DARwin5 reflect the presence of two distinct groups. The fast growing isolates that show high pathogenicity are present in group-I of the dendrogram whereas the members of group-II show grey black colony colour, light brown colony margin, plain irregular growth pattern, and comparatively larger beak length of conidia.
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