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水稻对硒吸收、分布及硒与硅共施效应

王永锐, 陈平

中山大学生命科学学院生物学系.广东,广州 510275

摘要

水稻幼苗根吸收的~(75)Se在顶叶分布较多,以下各叶依次减少,但根内积累更多。当Yoshida营养液加入0.1和0.3#mu#g/ml亚硒酸钠,根吸收~(32)P多,幼苗长高并生根;但经0.6#mu#g/ml处理后幼苗生长受抑制,叶片失绿。加Si可抑制Se高浓度使叶片变黄。在同样加Se处理中,加Si的株高、根长、叶绿素含量和叶片可溶性蛋白含量以及对~(32)P吸收量和幼苗地上部分布量均高于不加Si的处理,并随着Se浓度的增加而增高,而当Se浓度过高时则下降。加Si促进~(14)C-同化物分布在稻穗。

关键词： 水稻; 硒; 硅; 硒和硅共施

Selenium absorption and distribution in rice (Oryza sativa L.) plant and effects of mixed application of Se and Si

Wang Yongrui, Chen Ping

Department of Biology, School of Life Sciences, Sun Yatsen University. Guangzhou 510275, Guangdong

Abstract

The ~(75)Se absorbed by roots of rice plant (W6154s×Sheng-You-2, F_(1)) was distributed more in top leaf than in lower leaves and was highly concentrated in roots. Plant height, root length, ~(32)P distribution in plant shoot were higher under selenium treatment (Na_(2)SeO_(3)) at 0.3#mu#g/ml than at 0.1 #mu#g/ml. Na_(2)SeO_(3) at 0.6#mu#g/ml decreased plant growth, lowered the contents of soluble protein and chlorophyll in leaves, making them chlorotic. The addition of sodium silicate (SiO_(2)80 #mu#g/ml) together with selenite increased plant height, contents of chlorophyll and soluble protein, and the amount of ~(32)P absorbed and distributed to shoots, and made leaves greenish. When selenite concentration was too high, they were decreased. The addition of Si promoted ~(14)C-assimilate export from leaf, distribution in panicle and IAP (Wang 1987) at booting, milky and dough stages of rice plant.

Key words: Rice;Selenium;Silicate;Se and Si mixed application

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引用本文：

王永锐, 陈平. 水稻对硒吸收、分布及硒与硅共施效应[J]. 生理学报 1996; 48 (4): .

Wang Yongrui, Chen Ping. Selenium absorption and distribution in rice (Oryza sativa L.) plant and effects of mixed application of Se and Si. Acta Physiol Sin 1996; 48 (4): (in Chinese with English abstract).