Univrsity of Tehran Press Iranian Journal of Field Crop Science 2008-4811 49 1 2018 05 22 Study of the effects of drought stress on seed germination factors and activity of antioxidant enzymes in Bean genotypes (Phaseolus vulgaris L.) Study of the effects of drought stress on seed germination factors and activity of antioxidant enzymes in Bean genotypes (Phaseolus vulgaris L.) 11 27 66152 10.22059/ijfcs.2017.209308.654148 FA Maryam Heidari Postgraduate / University of Tehran Alireza Taleei Professor of University of Tehran 0000-0001-7143-6694 Alireza Abbasi Associate Professor ? University of Tehran 0000-0003-3598-0419 Journal Article 2016 08 28 Drought stress is one of the major causes of reducing crop improvement. To evaluate the effects of drought tolerance on seed characteristics the tolerant and sensitive seed genotypes of common bean were tested in petri dishes containing polyethylene glycol 6000 with concentration equal to 0, -4, -8 and -12 bar, according to CRD design with three replications in factorial arrangement. 9 day later, radice and caulice lengths were scored. The results showed that drought stress decreased rate and percentage of germination, radice and caulice lengths, fresh and dry weight of radices, and fresh and dry weight of caulice. To study biochemical processes in germination stages, genotypes 18, 25, and 29 and commercial variety of Yas were screened for polyethylene glycol 6000 with concentration equal to 0, -4, -8 and -12 bar. By evaluating of the studied traits and indices, with considering physiological and biochemical characteristics, it could be conclude that genotype 1189 was drought tolerant one in seedling stage in comparison to the rest of genotypes and Yas as a check variety. Drought stress is one of the major causes of reducing crop improvement. To evaluate the effects of drought tolerance on seed characteristics the tolerant and sensitive seed genotypes of common bean were tested in petri dishes containing polyethylene glycol 6000 with concentration equal to 0, -4, -8 and -12 bar, according to CRD design with three replications in factorial arrangement. 9 day later, radice and caulice lengths were scored. The results showed that drought stress decreased rate and percentage of germination, radice and caulice lengths, fresh and dry weight of radices, and fresh and dry weight of caulice. To study biochemical processes in germination stages, genotypes 18, 25, and 29 and commercial variety of Yas were screened for polyethylene glycol 6000 with concentration equal to 0, -4, -8 and -12 bar. By evaluating of the studied traits and indices, with considering physiological and biochemical characteristics, it could be conclude that genotype 1189 was drought tolerant one in seedling stage in comparison to the rest of genotypes and Yas as a check variety. https://ijfcs.ut.ac.ir/article_66152_a512a13cba4f6c460635abf0b029fd63.pdf