| タイトル | CHANGES IN ABSCISIC ACID, STOMATAL CONDUCTANCE, AND ANTIOXIDANTS DURING LOW TEMPERATURE PRECONDITIONING AGAINST SO_2 INJURY IN CONTRASTING CULTIVARS OF COLEUS |
| 本文（外部サイト） | https://catalog.lib.kyushu-u.ac.jp/opac_download_md/8269/KJ00004506939.pdf |
| 参考URL | http://hdl.handle.net/2324/8269 |
| 著者（英） | Krizek, D.T.; Terry, P.H.; Upadhyaya, A.; Caldwell, C.R.; Mirecki, R.M. |
| 発行日 | 2009-04-22 |
| 発行機関など | Biotron Institute, Kyushu University |
| 刊行物名 | BIOTRONICS |
| 巻 | 30 |
| 開始ページ | 1 |
| 終了ページ | 14 |
| 刊行年月日 | 2001-12 |
| 言語 | eng |
| 内容記述 | 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. |
| キーワード | ABA; avoidance mechanisms; Coleus blumei; cross protection; detoxification mechanisms; SO_2 tolerance; stress tolerance; temperature hardening |
| 資料種別 | Departmental Bulletin Paper |
| 著者版フラグ | publisher |
| ISSN | 0289-0011 |
| NCID | AA00110208 |
