Recently it was discovered that auxin promotes gibberellin (GA) biosynthesis in decapitated stems of pea (Pisum sativum L.) and tobacco (Nicotiana tabacum L.), and here we review the evidence for this interaction. We also discuss the possible relationship between auxin and the mechanisms by which bioactive GAs (such as GA 1 ) regulate their own levels, and the implications of the auxin-GA interaction for the control of plant growth. It is now possible to envisage auxin as a messenger linking the apical bud with the biosynthesis of active GAs in the expanding internodes. Finally, new evidence is presented that the promotion of growth by GA 1 does not depend on GA 1 -induced increases in auxin content.

Item Type:	Refereed Article
Research Division:	Biological Sciences
Research Group:	Plant biology
Research Field:	Plant physiology
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in the environmental sciences
UTAS Author:	Ross, JJ (Associate Professor John Ross)
UTAS Author:	O'Neill, DP (Mr Damian O'Neill)
UTAS Author:	Wolbang, CM (Miss Carla Wolbang)
UTAS Author:	Symons, GM (Mr Gregory Symons)
UTAS Author:	Reid, JB (Professor Jim Reid)
ID Code:	25147
Year Published:	2002
Web of Science® Times Cited:	77
Deposited By:	Plant Science
Deposited On:	2002-08-01
Last Modified:	2010-11-08
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