Role of chlorophylls and carotenoids in seed tolerance to abiotic stressors

Role of chlorophylls and carotenoids in seed tolerance to abiotic stressors It is found that chlorophylls are not fully destructed during seed ripening and can be detected in appreciable quantities in physiologically mature seeds. The elevated content of residual chlorophylls reduces seed tolerance to abiotic stresses. The seed carotenoids were represented mainly by lutein and, in much smaller quantities, by β-carotene. Carotenoids were found to accumulate in seeds during accelerated aging and during seed germination at high temperatures. The ratio of carotenoid to chlorophyll content (Car/Chl) is proposed to be a measure of seed tolerance to stress factors. The seeds with elevated Car/Chl ratio were characterized by higher tolerance to stress treatments. It is supposed that the presence of chlorophylls in seeds enhances oxidative stress induced by abiotic stress factors. Carotenoids are considered as antioxidants protecting the seeds against oxidative stress. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Role of chlorophylls and carotenoids in seed tolerance to abiotic stressors

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2011 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Physiology; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443711060161
Publisher site
See Article on Publisher Site

Abstract

It is found that chlorophylls are not fully destructed during seed ripening and can be detected in appreciable quantities in physiologically mature seeds. The elevated content of residual chlorophylls reduces seed tolerance to abiotic stresses. The seed carotenoids were represented mainly by lutein and, in much smaller quantities, by β-carotene. Carotenoids were found to accumulate in seeds during accelerated aging and during seed germination at high temperatures. The ratio of carotenoid to chlorophyll content (Car/Chl) is proposed to be a measure of seed tolerance to stress factors. The seeds with elevated Car/Chl ratio were characterized by higher tolerance to stress treatments. It is supposed that the presence of chlorophylls in seeds enhances oxidative stress induced by abiotic stress factors. Carotenoids are considered as antioxidants protecting the seeds against oxidative stress.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 12, 2011

References

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