Electric conductivity, Na + content and photosynthetic activity in leaves of salt-stressed rice plants, and their cultivaral difference

Michiyo Nakamura, Fumitake Kubota, Takuya Araki, Toshihiro Mochizuki

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

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 vegetative growth stage. The plants showed a clear response to the salt treatment within 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 conductance (Gs) and mesophyll conductance (Gm) decreased with an increase in LNC. A clear cultivaral difference was recognized in responses 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.

本文言語英語
ページ(範囲)225-231
ページ数7
ジャーナルJournal of the Faculty of Agriculture, Kyushu University
49
2
出版ステータス出版済み - 10月 2004

!!!All Science Journal Classification (ASJC) codes

  • 農業および生物科学(その他)

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