<紀要論文>
CHANGES IN ABSCISIC ACID, STOMATAL CONDUCTANCE, AND ANTIOXIDANTS DURING LOW TEMPERATURE PRECONDITIONING AGAINST SO_2 INJURY IN CONTRASTING CULTIVARS OF COLEUS

作成者
本文言語
出版者
発行日
収録物名
開始ページ
終了ページ
出版タイプ
アクセス権
概要 The influence of 5 days of low temperature preconditioning (13℃) on SO_2 sensitivity in relationship to abscisic acid (ABA) concentration, stomatal conductance, transpiration rate, and SO_2 injury was... examined in two cultivars of coleus found previously to differ in stress tolerance: SO_2-sensitive 'Buckley Supreme' ('BS') and SO_2-insensitive 'Marty' ('M'). 'BS' plants grown at 20℃ for 5 days and then fumigated with SO_2 for 2hr had 75% overall injury; those grown at 13℃ for 5 days had only 13% SO_2 injury. Corresponding 'M' plants given 20 and 13℃ pretreatment had 17 and 0% injury, respectively. This decrease in SO_2 sensitivity following preconditioning at 13℃ was associated with an increase in ABA concentration and a decrease in stomatal conductance and transpiration (Tn) rate, which presumably decreased the penetration of SO_2 into the leaf. Changes in the levels of several antioxidants and associated enzyme systems were also determined. Stress-insensitive 'M' contained 47% more ascorbate (AsA) and 17% greater ascorbate peroxidase (AP) activity than stress-sensitive 'BS.' Temperature preconditioning increased AP activity in 'BS' by 11% which was comparable to that found in 'M' at 20℃. Thus, the phytoprotection afforded against SO_2 by temperature preconditioning appears to involve both avoidance and detoxification mechanisms.続きを見る

本文情報を非表示

KJ00004506939 pdf 780 KB 132  

詳細

レコードID
査読有無
関連情報
主題
ISSN
NCID
タイプ
登録日 2009.04.22
更新日 2015.11.06

この資料を見た人はこんな資料も見ています