<紀要論文>
Reversible or Irreversible Change of Molecular Dynamics of Water in Pea Seedlings Exposed to Heaat Stress

作成者
本文言語
出版者
発行日
雑誌名
開始ページ
終了ページ
出版タイプ
アクセス権
概要 Influences of heat stress on epicotyls of per (Pisum sativum L.) plants were investigated by using non-destructive method. NMR spin-lattice relaxation time (T1), indicating molecular dynamics of water..., was determined in tall type, cv. Alaska and dwarf type, cv. Progress No.9 seedlings grown under light condition. In no-elongation zone for both fresh cultivars a rapid decrease in T1 occured in the tissues exposed to 20-30℃ while rapid increase folloed by gradual decrease occured in T1 for the tissues exposed to 20-40℃ during a heat-cool cycle. On the other hand, in heat-denatured dead tissues, T1 linearly corresponded. FUrther, when pea plants were heated for 5h at 20-30℃ or 20-40℃ thermal hysteresis changes in T1 corresponding temperature in the subsequent heat-cool cycles was notably different. Epicotyls exposed to 30℃ treatments did not show temperature dependency whole those of the tissues exposed to 40℃ indicated temperature dependency. After the subsequent heat-cool cycles, the former was alive, the latter indicated tissue necrosis. Therefore, the change in T1 of epicotyls observed within 1h was considered a fast adaption or morality in cells to heat stress, and a temperature dependency of T1 in the subsequent heat-cool cycles clearly reflected tissue viability in per epicotyls. In conclusion, T1 on thermal response can be used as indicator of reversible or irreversible injurity in an intact plant.続きを見る

本文情報を非表示

p039 pdf 661 KB 83  

詳細

レコードID
査読有無
関連情報
ISSN
NCID
タイプ
登録日 2009.04.22
更新日 2017.02.03