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用两种细胞分裂素类物质4PU-30和6-BA喷施受涝玉米苗株可显著减轻玉米涝渍伤害,表现为叶片内叶绿素的降解和脂质过氧化作用产物丙二醛的增生均明显减慢。两种细胞分裂素类物质相比较,4PU-30对丙二醛增生的抑制作用与6-BA效果相近;但抑制叶绿素降解的效果则不及6-BA。4PU-30和6-BA都能明显抑制受涝玉米叶片超氧物歧化酶(SOD)和过氧化氢酶活性的下降,表明其缓解涝害的作用机理都可能与调节活性氧代谢有关。淹水过程中,4PU-30和6-BA都能抑制受涝植株叶片的伸长生长,但排水后恢复生长则以4PU-30较快,而6-BA恢复较慢。本文还讨论了细胞分裂素类物质4PU-30和6-BA应用于农业生产的可能性。
Spraying corn seedlings with two cytokinins, 4PU-30 and 6-BA, significantly reduced the waterlogging damage in maize, which was manifested as degradation of chlorophyll and proliferation of malondialdehyde (MDA), a product of lipid peroxidation Obviously slow down. The inhibitory effect of 4PU-30 on MDA was similar to that of 6-BA, but the inhibition of chlorophyll degradation was not as good as 6-BA. Both 4PU-30 and 6-BA inhibited the decrease of superoxide dismutase (SOD) and catalase (CAT) activities in the leaves of flooded corn obviously, indicating that the mechanism of action of both 4PU-30 and 6-BA may be related to the regulation of active oxygen metabolism. During flooding, both 4PU-30 and 6-BA inhibited the elongation of leaf in flooded plants, but 4PU-30 recovered faster after drainage and 6-BA recovered slower. This article also discusses the possibility of applying the cytokinin 4PU-30 and 6-BA to agricultural production.