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采用水培法研究盐胁迫下不同浓度硅对玉米幼苗生长、叶绿素含量、保护酶活性等生理特性的影响。结果表明,适量的硅(1mmol/L)能有效促进玉米生长,抑制叶绿素含量降低,降低细胞膜透性,提高玉米叶片和根系中的SOD、CAT和POD活性。叶片中SOD、CAT、POD活性均以Na2SiO3浓度为1mmol/L时活性最强;根系中三种酶活性以Na2SiO3浓度为2mmol/L时最强,表明硅对叶片和根系中的酶活性调控并非完全同步,也可能是硅在叶片和根系中作用途径不同所致。
The effects of different concentrations of silicon on the physiological characteristics of corn seedling growth, chlorophyll content and protective enzyme activity under salt stress were studied using hydroponics. The results showed that appropriate amount of silicon (1mmol / L) could effectively promote the growth of corn, inhibit the decrease of chlorophyll content, decrease the permeability of cell membrane and increase the activities of SOD, CAT and POD in maize leaves and roots. The activities of SOD, CAT and POD in leaves were the strongest when Na2SiO3 concentration was 1 mmol / L; the activity of three enzymes in roots was strongest when Na2SiO3 concentration was 2 mmol / L, which indicated that the regulation of silicon on enzyme activities in leaves and roots was not Complete synchronization may also be caused by different ways of action of silicon in the leaves and roots.