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Response of Eucalyptus nitens seedlings to gibberellin biosynthesis inhibitors


Williams, DR and Ross, JJ and Reid, JB and Potts, BM, Response of Eucalyptus nitens seedlings to gibberellin biosynthesis inhibitors, Plant Growth Regulation, 27, (2) pp. 125-129. ISSN 0167-6903 (1999) [Refereed Article]

DOI: doi:10.1023/A:1006176928861


The plant growth regulators (PGRs) paclobutrazol, chlormequat chloride and prohexadione where applied to 11 month old seedling of Eucalyptus nitens to examine their relative effects on precocious flowering, growth and levels of GA20 and GA1 in the shoot apex. Paclobutrazol was most effective in reducing growth and levels of GA20 and GA1 in the seedlings followed by chlormequat chloride with prohexadione being least effective. Paclobutrazol and chlormequat chloride reduced both GA20 and GA1 levels by similar degrees, but prohexadione reduced GA1 levels considerably more than GA20 levels. None of these PGRs was effective in promoting precocious flowering. This suggests that there is an extra level of reproductive control operating in juveniles of this species compared to those of the closely related species E. globulus previously found to flower precociously in response to similar paclobutrazol treatments.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Williams, DR (Dr Dean Williams)
UTAS Author:Ross, JJ (Associate Professor John Ross)
UTAS Author:Reid, JB (Professor Jim Reid)
UTAS Author:Potts, BM (Professor Brad Potts)
ID Code:17578
Year Published:1999
Web of Science® Times Cited:14
Deposited By:Plant Science
Deposited On:1999-08-01
Last Modified:2009-07-31

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