Green and blue light photoreceptors are involved in maintenance of dormancy in imbibed annual ryegrass (Lolium rigidum) seeds

Goggin, D. E., Steadman, K. J. and Powles, S. B. (2008) Green and blue light photoreceptors are involved in maintenance of dormancy in imbibed annual ryegrass (Lolium rigidum) seeds. New Phytologist, 180 1: 81-89. doi:10.1111/j.1469-8137.2008.02570.x


Author Goggin, D. E.
Steadman, K. J.
Powles, S. B.
Title Green and blue light photoreceptors are involved in maintenance of dormancy in imbibed annual ryegrass (Lolium rigidum) seeds
Journal name New Phytologist   Check publisher's open access policy
ISSN 0028-646X
Publication date 2008-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1111/j.1469-8137.2008.02570.x
Open Access Status
Volume 180
Issue 1
Start page 81
End page 89
Total pages 9
Editor Woodward, F. I.
Place of publication United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Subject C1
270402 Plant Physiology
770804 Control of pests and exotic species
Abstract Light plays an important role in two separate processes within the seeds of Lolium rigidum (annual ryegrass). Dormant seeds of L. rigidum remain dormant when imbibed in the light, but once seeds have lost dormancy through dark-stratification, light stimulates their germination. This study characterizes the light qualities and quantities which are effective in maintenance of dormancy. Dormant seeds were stratified under narrow- and broad-waveband light to identify the potential photoreceptors involved in dormancy maintenance, and to determine whether dark-induced dormancy loss is reversible by light. Blue and green light both mediated dormancy maintenance in a far-red-independent manner. Red light resulted in dormancy maintenance only when far-red wavelengths were excluded, suggesting a redundant function of phytochrome. At low fluence rates, white light was more effective than monochromatic light, suggesting the action of multiple photoreceptors in dormancy maintenance. By contrast, nondormant seeds did not germinate unless provided with red light. These results indicate that seed dormancy maintenance is potentially mediated through the actions of blue and green light photoreceptors. Seed dormancy could thus be added to the growing list of plant responses that may be mediated by green light in a cryptochrome-independent manner
Keyword Plant Sciences
Plant Sciences
PLANT SCIENCES
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Pharmacy Publications
 
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Created: Tue, 31 Mar 2009, 22:45:14 EST by Elizabeth Pyke on behalf of School of Pharmacy