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The gibberellin status of lip1, a mutant of Pisum sativum L. which exhibits light-independent photomorphogenesi


Sponsel, VM and Ross, JJ and Reynolds, MR and Symons, GM and Reid, JB, The gibberellin status of lip1, a mutant of Pisum sativum L. which exhibits light-independent photomorphogenesi, Plant Physiology, 112, (1) pp. 61-66. ISSN 0032-0889 (1996) [Refereed Article]

DOI: doi:10.1104/pp.112.1.61


Dark-grown seedlings of the lip1 (light independent photomorphogenesis) mutant of Pisum sativum L. display many features of de-etiolated growth and are similar in many respects to wild-type (WT) seedlings grown in the light. The involvement of gibberellins (GAs) with the mutant phenotype was examined by applying GA1 and GA20 to the mutant and WT, and by quantifying endogenous GA1, GA8, GA19, GA20, and GA29 levels in the two genotypes. These experiments were conducted in both the light and the dark. In neither environment could GA application restore elongation in the mutant to that in GA-treated WT plants. Quantification of GAs provided further evidence that the mutant phenotype is not attributable to a deficiency in endogenous GA1. However, dark-grown lip1 seedlings contained lower levels of GA19 and higher levels of GA20 than dark-grown WT plants, whereas in the light, the effect of the mutation on the ratio of GA19 to GA20 was reversed. Thus, there appears to be a complex interaction between the lip1 mutation, the light regime, and the step GA19 to GA20.

Item Details

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:Symons, GM (Mr Gregory Symons)
UTAS Author:Reid, JB (Professor Jim Reid)
ID Code:7133
Year Published:1996
Web of Science® Times Cited:7
Deposited By:Plant Science
Deposited On:1996-08-01
Last Modified:2010-10-11

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