Effect of NaCl on the Photosynthesis, Water Relations and Free Proline Accumulation in the Wild Oryza Species

資料種別:
論文(リポジトリ)
責任表示:
Nakamura, Ichiro ; Murayama, Seiichi ; Tobita, Satoshi ; Ba Bong, Bui ; Yanagihara, Seiji ; Ishimine, Yukio ; Kawamitsu, Yoshinobu
言語:
英語
出版情報:
The Crop Science Society of Japan — 日本作物学会, 2002-12
著者名:
Nakamura, Ichiro
Murayama, Seiichi
Tobita, Satoshi
Ba Bong, Bui
Yanagihara, Seiji
Ishimine, Yukio
Kawamitsu, Yoshinobu
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掲載情報:
Plant Production Science
ISSN:
1343-943X  CiNii Articles  Webcat Plus  JAIRO
巻:
5
通号:
4
開始ページ:
305
終了ページ:
310
バージョン:
publisher
概要:
The physiological responses of wild Oryza species (Oryza latifolia Desv., a salt-tolerant species and O. rufipogon Griff., a salt-susceptible species) to salinity stress were investigated by comparing with check varieties of cultivated rice (O. sativa L.), SR26B (salt-tolerant) and IR28 (salt-susceptible). As the Nacl concentration of water culture solution was raised to 12 dS m^<-1> (about 113mM), leaf Na^+ content per dry matter in wild Oryza species increased from 4 to 17 times as compared with the control (no NaCl treatment), whereas the accumulation was lower in cultivated rice varieties. The increased concentration of leaf Na^+ resulted in the decrease in leaf water potential (Ψ_w) in all rice species, although the degree of decline in photosynthetic rate was different among the varieties. It was notable that the photosynthetic rate was almost constant in O. latifolia though Ψ_w decreased to - 2.0 MPa with the increased NaCl concentration in the water culture solution. A significant negative correlation between free-proline content and osmotic potential (Ψ_s) of leaf blade was found in both salt tolerant entries, SR26B and O. latifolia. In spite of higher leaf Na^+ storage, the survival rate of O. latifolia was higher than that of SR26B, indicating that the mechanism of salt tolerance in O. latifolia may be different from that in SR26B. 続きを見る
URL:
http://hdl.handle.net/20.500.12000/4870
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