Differential requirement for NO during ABA-induced stomatal closure in turgid and wilted leaves

被引：55

作者：

Ribeiro, Dimas M. ^{[1
,2
]}

Desikan, Radhika ^{[3
]}

Bright, Jo ^{[1
]}

Confraria, Ana ^{[1
,4
]}

Harrison, Judith ^{[1
]}

Hancock, John T. ^{[1
]}

Barros, Raimundo S. ^{[2
]}

Neill, Steven J. ^{[1
]}

Wilson, Ian D. ^{[1
]}

机构：

[1] Univ W England, Fac Hlth & Life Sci, Ctr Res Plant Sci, Bristol BS16 1QY, Avon, England

[2] Univ Fed Vicosa, Dept Biol Vegetal, BR-36571000 Vicosa, MG, Brazil

[3] Univ London Imperial Coll Sci Technol & Med, Fac Nat Sci, Div Biol, London SW7 2AZ, England

[4] Univ Porto, Fac Ciencas, Dept Bot, P-4169007 Oporto, Portugal

来源：

PLANT CELL AND ENVIRONMENT | 2009年 / 32卷 / 01期

关键词：

abscisic acid; nitric oxide; stomata; transpiration; water stress; NITRIC-OXIDE; ABSCISIC-ACID; HYDROGEN-PEROXIDE; GUARD-CELLS; CYTOSOLIC CA2+; K+ CHANNELS; IN-VIVO; ARABIDOPSIS; IDENTIFICATION; SENSITIVITY;

D O I：

10.1111/j.1365-3040.2008.01906.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Abscisic acid (ABA)-induced stomatal closure is mediated by a complex, guard cell signalling network involving nitric oxide (NO) as a key intermediate. However, there is a lack of information concerning the role of NO in the ABA-enhanced stomatal closure seen in dehydrated plants. The data herein demonstrate that, while nitrate reductase (NR)1-mediated NO generation is required for the ABA-induced closure of stomata in turgid leaves, it is not required for ABA-enhanced stomatal closure under conditions leading to rapid dehydration. The results also show that NO signalling in the guard cells of turgid leaves requires the ABA-signalling pathway to be both capable of function and active. The alignment of this NO signalling with guard cell Ca2+-dependent/independent ABA signalling is discussed. The data also highlight a physiological role for NO signalling in turgid leaves and show that stomatal closure during the light-to-dark transition requires NR1-mediated NO generation and signalling.

引用

页码：46 / 57

页数：12

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