, Volume 49, Issue 1, pp 140–144 | Cite as

Photosynthetic characterization at different senescence stages in an early senescence mutant of rice Oryza sativa L.

Brief Communication


An early senescence (es) mutant of rice Oryza sativa L. with progressing death of most of leaves before heading stage was identified in the field in Hainan province. After tillering stage, the brown striations were found in the base of green leaves randomly, and then expanded to whole leaves. No fungi, bacteria, and viruses were detected in the brown striations suggesting that it was a genetic mutant. The ultrastructure of leaf cells at the site of brown striations showed breakdown of chloroplast thylakoid membrane structures and other organelles, and condensation of the cytoplasm at severe senescence stage. The photosynthetic activity and chlorophyll (Chl) contents decreased irreversibly along with leaf senescence process.

Additional key words

photosynthesis pigments senescence ultrastructure 





early senescence


minimal fluorescence level in dark-adapted leaves


minimal fluorescence level in light-adapted leaves


maximal fluorescence level in dark-adapted leaves


maximal fluorescence level in light-adapted leaves


variable fluorescence level in dark-adapted leaves


variable fluorescence level in light-adapted leaves


maximal efficiency of PSII photochemistry


efficiency of excitation energy capture by open PSII reaction centers




nitroblue tetrazolium


nonphotochemical quenching




photosynthetic photon flux density


photosystem II


photochemical quenching coefficient


superoxide dismutase




actual PSII efficiency


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This work is supported by Chinese National Nonprofit Institute Research Grant of CATAS-RRI (YWFZX09-02(N)) and Supported by an earmarked fund for Modern Agro-industry Technology Research System (No.nycytx-34-GW1-2).


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Ministry of Agriculture Key Laboratory of Rubber Biology, State Key Laboratory Incubation Base for Cultivation and Physiology of Tropical Crops, Rubber Research InstituteCATASDanzhou, HainanChina

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