We describe a new mutation, lrs, which reduces internode length in Pisum sativum L. The mutation appears to act by reducing both GA synthesis and the response to GA1. The levels of the 13-hydroxylated GAs, GA53, GA44, GA19, GA20, GA1, and GA8 in the lrs mutant were greatly reduced compared with the wild-type. The extent of the reduction in GA1 content in the apical tissues would, at least in part, account for the dwarf phenotype of the mutant. The reduced GA responsiveness of the new mutant was indicated by the inability of applied GA, to remove the difference in elongation between lrs and LRS plants. The lrs mutant appears to be unique amongst internode length genotypes, possessing characteristics of both GA synthesis and GA response mutants.

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:	Mackenzie-Hose, AK (Mr Alasdair Kenneth Mackenzie-Hose)
UTAS Author:	Sherriff, L (Ms Sherriff)
UTAS Author:	Ross, JJ (Associate Professor John Ross)
UTAS Author:	Reid, JB (Professor Jim Reid)
ID Code:	15055
Year Published:	1998
Web of Science® Times Cited:	2
Deposited By:	Plant Science
Deposited On:	1998-08-01
Last Modified:	2010-11-09
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