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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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Citing This Article：

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).