ePrints

Phospholipase C is required for the control of stomatal aperture by ABA

Lookup NU author(s): Professor Joanna Gray

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.

Abstract

The calcium-releasing second messenger inositol 1,4,5-trisphosphate is involved in the regulation of stomatal aperture by ABA. In other signalling pathways, inositol 1,4,5-trisphosphate is generated by the action of phospholipase C. We have studied the importance of phospholipase C in guard cell ABA-signalling pathways. Immunolocalisation of a calcium-activated phospholipase C confirmed the presence of phospholipase C in tobacco guard cells. Transgenic tobacco plants with considerably reduced levels of phospholipase C in their guard cells were only partially able to regulate their stomatal apertures in response to ABA. These results suggest that phospholipase C is involved in the amplification of the calcium signal responsible for reductions in stomatal aperture in response to ABA. As full ABA-induced inhibition of stomatal opening was not observed, our results support a role for the action of other calcium-releasing second messengers in the guard cell ABA-signalling pathway. It is not known whether these different calcium-releasing second messengers act in the same or parallel ABA-signalling pathways.

Publication metadata

Author(s): Hunt L, Mills LN, Pical C, Leckie CP, Aitken FL, Kopka J, Mueller-Roeber B, McAinsh MR, Hetherington AM, Gray JE

Publication type: Article

Publication status: Published

Journal: Plant Journal

Year: 2003

Volume: 34

Issue: 1

Pages: 47-55

Print publication date: 01/04/2003

ISSN (print): 0960-7412

ISSN (electronic): 1365-313X

Publisher: Wiley-Blackwell Publishing

URL: http://dx.doi.org/10.1046/j.1365-313X.2003.01698.x

DOI: 10.1046/j.1365-313X.2003.01698.x

PubMed id: 12662308

Altmetrics

Funding

Share