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为探讨外源硅对野生大豆幼苗耐盐性的影响机制,采用水培的方式测定外源硅(K2SiO3)对盐胁迫(NaCl)下野生大豆叶片抗氧化酶活性、叶绿素含量、光合速率和氧自由基(ROS)含量的影响。结果表明:外源硅可以提高盐胁迫条件下野生大豆的生长,降低叶片丙二醛(MDA)、超氧阴离子自由基(O-2·)和过氧化氢(H2O2)的含量,提高超氧化物歧化酶(SOD)、抗坏血酸过氧化物酶(APX)及过氧化物酶(POD)的活性,提高叶绿素含量和光合速率。进一步证实外源硅对于植物的新陈代谢及生理变化具有重要作用。
In order to investigate the mechanism of exogenous silicon on the salt tolerance of wild soybean seedlings, the effects of exogenous silicon (K2SiO3) on antioxidant enzyme activities, chlorophyll content, photosynthetic rate and oxygen content of wild soybean leaves under salt stress (NaCl) Free radical (ROS) content. The results showed that exogenous silicon could increase the growth of wild soybean under salt stress and reduce the content of malondialdehyde (MDA), superoxide anion free radical (O-2 ·) and hydrogen peroxide (H2O2) The activities of SOD, APX and POD increased chlorophyll content and photosynthetic rate. It is further confirmed that exogenous silicon plays an important role in plant metabolism and physiological changes.