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

Harrison, Judith; Ribeiro, Dimas M.; Desikan, Radhika; Bright, Jo; Confraria, Ana; Hancock, John T.; Neill, Steven; Barros, Raimundo S.; Wilson, Ian D.

Abstract

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 Ca 2+-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. © 2008 The Authors.

Citation

Harrison, J., Ribeiro, D. M., Desikan, R., Bright, J., Confraria, A., Hancock, J. T., …Wilson, I. D. (2009). Differential requirement for NO during ABA-induced stomatal closure in turgid and wilted leaves. Plant, Cell and Environment, 32(1), 46-57. https://doi.org/10.1111/j.1365-3040.2008.01906.x

• Journal Article Type: Article
• Publication Date: Jan 1, 2009
• Journal: Plant, Cell and Environment
• Print ISSN: 0140-7791
• Electronic ISSN: 1365-3040
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 32
• Issue: 1
• Pages: 46-57
• DOI: https://doi.org/10.1111/j.1365-3040.2008.01906.x
• Keywords: abscisic acid, nitric oxide, stomata, transpiration, water stress
• Public URL: https://uwe-repository.worktribe.com/output/1005395
• Publisher URL: http://dx.doi.org/10.1111/j.1365-3040.2008.01906.x