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Role of chlorophylls and carotenoids in seed tolerance to abiotic stressors

  • G. N. Smolikova
  • N. A. Laman
  • O. V. Boriskevich
Research Papers

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.

Keywords

angiosperms seeds chlorophylls carotenoids xanthophylls lutein accelerated aging germination heat stress 

Abbreviations

te]AA

accelerated aging

Car/Chl ratio

the relative content of carotenoids with respect to chlorophyll content

CFI

chlorophyll fluorescence intensity

Chl

chlorophylls

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • G. N. Smolikova
    • 1
  • N. A. Laman
    • 2
  • O. V. Boriskevich
    • 2
  1. 1.Laboratory of Plant Development, Department of Plant Physiology and BiochemistrySt. Petersburg State UniversitySt. PetersburgRussia
  2. 2.Laboratory of Plant Growth and Development, Kuprevich Institute of Experimental BotanyNational Academy of Sciences of BelarusMinskBelarus

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