低温胁迫对菜豆种子吸胀期间生理特性和发芽能力的影响

为探讨菜豆种子在低温胁迫下吸胀期间的生理及发芽能力。以12个菜豆品种的种子为试验材料,设置常温对照(CK)和4℃低温(LT),测定低温胁迫对菜豆种子吸胀期间的生理特性和发芽能力的影响。结果表明:与常温对照相比,低温处理的12种菜豆的发芽率均有所降低,根系活力在不同的品种中表现不同,超氧化物歧化酶(SOD)活性大部分降低,过氧化氢酶(CAT)活性降低,过氧化物酶(POD)活性在4个品种中显著升高;丙二醛(MDA)和可溶性蛋白含量在不同的品种变化不同,但两者之间呈正相关关系;电解质渗漏率在4个品种中增高。不同菜豆品种的种子对吸涨冷害的响应模式存在很多大的差异,解析高抗型和敏感型菜豆种子响应吸胀冷害的生理生化变化,可为进一步筛选抗吸胀冷害的菜豆品种提供理论基础。

Low Temperature Stress: Effects on Physiological Characteristics and Germination Ability of Common Bean Seeds During Imbibition

To discuss the physiological characteristics and germination ability of common bean seeds during imbibition under low temperature stress, taking seeds of 12 common bean varieties as test materials, we determined the effects of low temperature stress on the physiological characteristics and germination ability of common bean seeds during imbibition by setting 2 treatments with the normal temperature control (CK) and the low temperature (LT) at 4℃. The results showed that: compared with CK, the germination rate of 12 common bean varieties of LT decreased, and the root activity was different among the varieties; the SOD activity was mostly reduced, the CAT activity decreased, the POD activity increased significantly in 4 varieties, and MDA and the soluble protein content varied in different varieties, but there was a positive correlation between MDA and soluble protein content. There are big differences in the response patterns of different common bean seeds to imbibition at low temperature, analyzing the physiological and biochemical changes of high-resistant and sensitive common bean seeds in response to imbibition at low temperature can provide a basis for further screening the varieties resistant to imbibition at low temperature.