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Effects of Nitric Oxide on the Germination of Wheat Seeds and Its Reactive Oxygen Species Metabolisms Under Osmotic Stress 被引量:51

一氧化氮对渗透胁迫下小麦种子萌发及其活性氧代谢的影响(英文)
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摘要 Effects of sodium nitroprusside (SNP), a nitric oxide (NO) donor, on the germination and metabolism of reactive oxygen species were surveyed in wheat (Triticum aestivum L.) seeds. Germination of wheat seeds and even the elongation of radicle and plumule were dramatically promoted by SNP treatments during the germination under osmotic stress. Meanwhile, activities of amylase and EP were enhanced, thus leading to the degradation of storage reserve in seeds. After osmotic stress was removed, higher viability of wheat seeds was also maintained. In addition, the activities of CAT, APX and the content of proline were increased by SNP treatment simultaneously, but activities of LOX were inhibited, and both of which were beneficial for improving the antioxidant capacity during the germination of wheat seeds under osmotic stress. It was also shown that the increase of the activity of amylase induced by SNP in embryoless half-seeds of wheat in the beginning period of germination (6 h) might be indirectly related to GA(3). 一氧化氮供体硝普钠(Sodium nitroprusside,SNP)能明显地促进渗透胁迫下小麦(Triticum aestivum L.)种子萌发、胚根和胚芽伸长,提高萌发过程中淀粉酶和内肽酶的活力,加速贮藏物质的降解;胁迫解除后,仍能使种子维持较高的活力。此外,SNP还能显著诱导渗透胁迫下CAT、APX活力的上升和脯氨酸含量积累,抑制LOX活力,从而提高渗透胁迫下小麦种子萌发过程中抗氧化能力。进一步研究还发现,SNP诱导切胚半粒小麦种子萌发早期(6h)的淀粉酶活力上升可能与GA_3无直接关系。
出处 《Acta Botanica Sinica》 CSCD 2003年第8期901-905,共5页 Acta Botanica Sinica(植物学报:英文版)
关键词 nitric oxide (NO) wheat seed germination osmotic stress storage reserve degradation reactive oxygen species metabolism gibberellin (GA(3)) 一氧化氮 小麦 种子萌发 渗透胁迫 贮藏物质降解 活性氧代谢 赤霉素
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  • 1Relationship between endopeptidases and H2O2 during wheat leaves aging[J].Acta Bot Sin (植物学报),:127-131.

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