Photosynthetica 2011, 49(1):140-144 | DOI: 10.1007/s11099-011-0009-z

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

L. F. Wang1,*, Y. Y. Chen1
1 Ministry of Agriculture Key Laboratory of Rubber Biology, State Key Laboratory Incubation Base for Cultivation and Physiology of Tropical Crops, Rubber Research Institute, CATAS, Danzhou, Hainan, China

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

Received: April 27, 2010; Accepted: January 24, 2011; Published: March 1, 2011  Show citation

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Wang, L.F., & Chen, Y.Y. (2011). Photosynthetic characterization at different senescence stages in an early senescence mutant of rice Oryza sativa L. Photosynthetica, 49(1), 140-144. doi: 10.1007/s11099-011-0009-z
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