<紀要論文>
Electric Conductivity,Na+ Content and Photosynthetic Activity in Leaves of Salt-Stressed Rice Plants,and Their Cultivaral Difference

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概要 The electric conductivity of a leaf (LEC) was determined with an insulation resistance tester, and discussed its relationship with Na[+] content in a leaf (LNC) and the photosynthetic activity in salt...-stressed rice cultivars. The measurements were carried out using three cultivars of O. sativa and O. glaberrima grown at the middle vegative growth stage. The plants showed a clear response to the salt treatment wothin 24 hours after its application. Both LEC and LNC in these cultivars increased with an increase in NaCl concentration in culture solution from 0 to 0.1 μmol L[-1]. LEC had a close linear relationship with LNC in each cultivar. A negative relationship was found between LEC and gross photosynthetic rate(Pg). The stomatal concuctance (Gs) and mesophyll conduntance (Gm) decreased with an increase in LNC. A clear cultivaral dofference was recognized in responces to salt treatments. LEC was regarded as a useful indicator for the estimation or diagnosis of LNC and photosynthetic activity in salt-stressed rice cultivars.続きを見る

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登録日 2009.04.22
更新日 2020.02.10