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ID 25955
本文ファイル
著者
Suwa, Ryuichi
Fujimaki, Shu
Suzui, Nobuo
Kawachi, Naoki
Ishii, Satomi
Sakamoto, Koichi
Nguyen, Nguyen Tran
Mohapatra, Pravat K.
Moghaieb, Reda E.
Matsuhashi, Shinpei
Fujita, Kounosuke
キーワード
NaCl
PETIS
Photosynthesis
Soure-sink
Stem diameter
Translocation
NDC
物理学
抄録(英)
Salinity stress affects photosynthate partitioning between sources and sinks of plants, but how it affects on these systems is less understood. Because sources and sinks are closely knitted, any adverse effect under sub-optimal condition on one part is often misinterpreted for the other. Knowledge on regulation of carbon partitioning is indispensable for stress resistance and good plant growth. In the present study, alteration of carbon partitioning in tomato plants (lycopersicon esculentum L. cv. Momotarou) under saline (NaCl) environment was studied by feeding radioactive 11C and stable 13C isotopes. Pulse chases were conducted for measuring spatial and temporal distributions of 13C. 13C was measured by standard conventional technique, but 11C distribution was monitored using by PETIS. Salt stress resulted in reduced carbon translocation towards roots. Majority of the photosynthate accumulated in the leaf. We have also observed that the reduction in translocation of carbon occurred well before salt stress symptoms of reduced photosynthesis and plant growth in salt exposed plants. The effect on sink activity also showed by decrease in stem diameter and reduced photosynthetic activity. In addition, PETIS analysis of 11C translocation indicates that carbon translocation to roots was inhibited under salt conditions without direct effect of leaf Na accumulation and osmotic stress These results suggest that NaCl has direct effects on plants inhibiting carbon partitioning within few hours of salt solution exposure without inhibition of source activity.
掲載誌名
Plant Science
175巻
3号
開始ページ
210
終了ページ
216
出版年月日
2008-09
出版者
Elsevier Ireland Ltd
ISSN
0168-9452
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2008 Elsevier Ireland Ltd
関連情報URL
部局名
生物圏科学研究科