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Silicon reduces sodium uptake in rice ( Oryza sativa L.) in saline conditions and this is accounted for by a reduction in the transpirational bypass flow by A. R. YEO; S. A. FLOWERS; G. RAO; K. WELFARE; N. SENANAYAKE; T. J. FLOWERS is a Agricultural and Biological Sciences article available to read on EtoBox.

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Rice is relatively sensitive to salinity and is classified as a silicon accumulator. There have been reports that silicon can reduce sodium uptake in crop grasses in saline conditions, but the mechanism by which silicon might alleviate salinity damage is unclear. We report on the effects of silicon on growth, gas exchange and sodium uptake in rice genotypes differing in salt tolerance. In non‐saline media there were no effects of supplementary silicate upon shoot fresh or dry weight or upon root dry weight, indicating that the standard culture solution was not formally deficient with respect to silicon. Plants grown with supplementary silicate had slightly, but significantly, shorter leaves than plants grown in a standard culture solution. Salinity reduced growth and photosynthetic gas exchange. Silicate supplementation partly overcame the reduction in growth and net photosynthesis caused by salt. This amelioration was correlated with a reduction in sodium uptake. Silicate supplementation increased the stomatal conductance of salt‐treated plants, showing that silicate was not acting to reduce sodium uptake via a reduction in the transpiration rate. Silicate reduced both sodium tran

Who reads Silicon reduces sodium uptake in rice ( Oryza sativa L.) in saline conditions and this is accounted for by a reduction in the transpirational bypass flow?

Author

A. R. YEO; S. A. FLOWERS; G. RAO; K. WELFARE; N. SENANAYAKE; T. J. FLOWERS

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0140-7791)

Published

1999

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)