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作 者:赵新宇[1] 徐克章[2] 张玉姣[2] 陈展宇[2] 张治安[2]
机构地区:[1]吉林农业大学园艺学院,吉林长春130118 [2]吉林农业大学农学院,吉林长春130118
出 处:《大豆科学》2014年第3期358-364,共7页Soybean Science
基 金:国家自然科学基金(30871547,31171459);吉林省自然科学基金(20101571);吉林省科技发展计划重大项目(20126033)
摘 要:以4个北方常规大豆品种为试验材料,在不同生育时期将大豆从茎基部剪断分别放入含有细胞激动素(CTK)、脱落酸(ABA)和生长素(IAA)的营养液中培养,研究了外源激素对不同生育时期离体大豆植株叶片光合相关参数的影响。结果表明:ABA对叶片净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)具有抑制作用,CTK和IAA对大豆叶片Pn、Gs和Tr具有促进作用;同一激素对不同生育时期大豆叶片Pn、Gs和Tr的影响表现为:ABA在盛花期(R2)和结荚期(R4)对Pn、Gs和Tr的抑制作用要高于鼓粒期(R6),而CTK和IAA在R6期对Pn、Gs和Tr的促进作用要高于R2和R4期。由此说明外源激素对大豆植株的光合相关参数具有明显的调控作用。In order to study the effects of exogenous hormones on leaf photosynthetic parameters of soybean plants, four soybean cuhivars from north China were cut from the stem base, and then placed in to nutrient solution containing cytokinin (CTK), abscisic acid (ABA)and auxin (IAA)respectively and cultured at different growth stages. The result showed that ABA inhibited significantly leaf net photosynthetic rate ( Pn), stomatal conductance ( Gs ) and transpiration rate (Tr) of soybean leaf, while both CTK and IAA enhanced their values. The effect of the same hormones on Pn, Gs and Tr of soybean leaf at different growth stages suggested that ABA has more severe inhibition effects on Pn, Gs and Tr at flowering(R2) and pod-setting(H4) than seed filling(R6) ,while CTK and IAA had more significant enhancement on Pn, Gs and Tr at R6 than R2 and R4. The results indicated that exogenous hormones had close relationship with leaf photosynthetic parameters of soybean plants.
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