ABA inhibits germination but not dormancy release in mature imbibed seeds of Lolium rigidum gaud

Goggin, D. E., Steadman, K. J., Neil Emery, R. J., Farrow, S. C., Bench-Arnold, R. L. and Powles, S. B. (2009) ABA inhibits germination but not dormancy release in mature imbibed seeds of Lolium rigidum gaud. Journal of Experimental Botany, 60 12: 3387-3396.


Author Goggin, D. E.
Steadman, K. J.
Neil Emery, R. J.
Farrow, S. C.
Bench-Arnold, R. L.
Powles, S. B.
Title ABA inhibits germination but not dormancy release in mature imbibed seeds of Lolium rigidum gaud
Formatted title ABA inhibits germination but not dormancy release in mature imbibed seeds of Lolium rigidum gaud
Journal name Journal of Experimental Botany  (ERA 2012 Listed)    (ERA 2010 Rank A)   Check publisher's open access policy
Publication date 2009
Sub-type Article
DOI 10.1093/jxb/erp175
Volume number 60
Issue number 12
ISSN 0022-0957
Start page 3387
End page 3396
Total pages 10
Editor Prosser, D.
Place of publication United Kingdom
Publisher Oxford University Press
Collection year 2010
Language eng
Subject C1
060705 Plant Physiology
960413 Control of Plant Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments
Abstract Dormancy release in imbibed annual ryegrass (Lolium rigidum Gaud.) seeds is promoted in the dark but inhibited in the light. The role of abscisic acid (ABA) in inhibition of dormancy release was found to be negligible, compared with its subsequent effect on germination of dormant and non-dormant seeds. Inhibitors of ABA metabolism had the expected effects on seed germination but did not influence ABA concentration, suggesting that they act upon other (unknown) factors regulating dormancy. Although gibberellin (GA) synthesis was required for germination, the influence of exogenous GA on both germination and dormancy release was minor or non-existent. Embryo ABA concentration was the same following treatments to promote (dark stratification) and inhibit (light stratification) dormancy release; exogenous ABA had no effect on this process. However, the sensitivity of dark-stratified seeds to ABA supplied during germination was lower than that of light-stratified seeds. Therefore, although ABA definitely plays a role in the germination of annual ryegrass seeds, it is not the major factor mediating inhibition of dormancy release in imbibed seeds.
Keyword Abscisic Acid
Seed
Lolium Rigidum
gibberellins
Germination
fluridone
Dormancy Release
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article
Collections: 2010 Higher Education Research Data Collection
School of Pharmacy Publications
 
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