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JXB Advance Access originally published online on December 12, 2003
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Journal of Experimental Botany, Vol. 55, No. 395, pp. 247-251, January 1, 2004
© 2004 Oxford University Press

Signalling in Abiotic Stress

Hormone signalling from a developmental context

Received 5 October 2003; Accepted 14 October 2003

Brenda Chow and Peter McCourt*

Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 3B2, Canada

* To whom correspondence should be addressed. Fax: +1 416 978 5978. E-mail: mccourt{at}botany.utoronto.ca

The influence of hormones on plant growth and development has been clearly documented over the past 50 years. Now, with molecular genetics, the genes that convert changes in hormone levels into a cellular response are beginning to be identified. However, recent studies have demonstrated that the developmental context in which the hormones act plays a large influence on their synthesis and action. In this review, examples are given where known hormone response genes have been shown to have broader developmental roles as well as examples where genes that regulate developmental decisions, such as differentiation and fate, also influence hormone metabolism. The early conclusion of these studies is that an understanding of hormone signal transduction cannot be achieved in the absence of a developmental framework.

Key words: Cross-talk, hormones, plant development, signal transduction,


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