论文部分内容阅读
采用梯度试验法对野生大豆与栽培大豆进行不同时间(0、10、20 d)的干旱处理,测定不同处理的丙二醛(MDA)含量,过氧化物酶(POD)、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性。结果表明:随着干旱时间的延长,野生大豆比栽培大豆具有较少的丙二醛积累,表明其膜系统受干旱胁迫损伤较小。野生大豆在干旱胁迫时表现出高于栽培大豆的POD和SOD酶活性,以及同栽培大豆相当的CAT酶活性,表明野生大豆比栽培大豆更有效的清除干旱胁迫引起的超氧阴离子自由基的积累,减少干旱胁迫的伤害。因此,野生大豆的抗旱性强于栽培大豆。
Gradient test was used to study the drought tolerance of wild soybean and cultivated soybean at different time (0, 10, 20 d). The contents of malondialdehyde (MDA), peroxidase (POD), catalase CAT) and superoxide dismutase (SOD) activity. The results showed that with the prolongation of drought time, wild soybean had less accumulation of malondialdehyde than that of cultivated soybean, indicating that its membrane system was less damaged by drought stress. Wild soybean exhibited higher POD and SOD activities than cultivated soybean at drought stress and comparable CAT activity to that of cultivated soybean, indicating that accumulation of superoxide anion radicals by wild soybean was more effective than drought-induced cultivation of cultivated soybean , Reduce the damage of drought stress. Therefore, the drought resistance of wild soybean is stronger than that of cultivated soybean.