Xanthine Dehydrogenase Involves in the Response of Photosystem and Reactive Oxygen Metabolism to Drought Stress in Rice
文献类型： 外文期刊
第一作者： Han, R.
作者： Han, R.;Jiang, W.;Tang, S.;Pan, X.;Shi, Q.;Wu, Z.;Wan, J.;Long, Q.
作者机构：
关键词： Oryza sativa; xanthine dehydrogenase; drought stress; RNA interference; over-expression; photosystem; reactive oxygen metabolism
期刊名称：RUSSIAN JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：1.481； 五年影响因子：1.608 ）
ISSN： 1021-4437
年卷期： 2018 年 65 卷 3 期
页码：
收录情况： SCI
摘要： Xanthine dehydrogenase (XDH) is a crucial enzyme involved in purine metabolism. Although the essential role of XDH is well studied in leguminous plants and Arabidopsis, the importance of this enzyme remains uncertain in rice. To evaluate how biochemistry indicators respond to XDH down-regulation and up-regulation in rice seedings during drought stress, RNA interference (RNAi) and CDS over-expression were used to generate transgenic lines of Nipponbare (Oryza sativa L.) in which OsXDH, the gene for XDH were silenced and over-expression. When the XDH-suppressed line was subjected to drought stress, the chlorophyll content and chlorophyll fluorescence parameters were markedly reduced in conjunction with significantly O (2) (-) enhanced production rate and MDA accumulation. This drought-hypersensitive biochemistry indicators was reversed in XDH-intensified line. Meanwhile, the XDH activity and its downstream metabolites were induced by drought stress. These observations support the notion that xanthine dehydrogenase was involved in regulating photosystem and reactive oxygen metabolism in drought stress in rice seedling.
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