High photosynthetic efficiency of a rice (Oryza sativa L.) xantha mutant

作者：Zhou XS; Wu DX; Shen SQ; Sun JW; Shu QY^*

来源：Photosynthetica, 2006, 44(2): 316-319.

DOI：10.1007/s11099-006-0025-6

• chlorophyll b-deficiency
• chlorophyll fluorescence
• net photosynthetic rate
• Oryza sativa
• photosynthetic efficiency
• xantha mutation

Comparative analysis revealed that a xantha rice mutant (cv. Huangyu B) had higher ratios of chlorophyll (Chl) alb and carotenoids/Chl, and higher photosynthetic efficiency than its wild type parent (cv. II32 B). Unexpectedly, the mutant had higher net photosynthetic rate (P-N) than II32 B. This might have resulted from its lower non-photochemical quenching (q(N)) but higher maximal photochemical efficiency (F-v/F-m), higher excitation energy capture efficiency of photosystem 2 (PS2) reaction centres (F-v'/F-m'), higher photochemical quenching (q(p)), higher effective PS2 quantum yield (phi(PS2)), and higher non-cyclic electron transport rate (ETR). This is the first report of a chlorophyll mutant that has higher photosynthetic efficiency and main Chl fluorescence parameters than its wild type. This mutant could become a unique material both for the basic research on photosynthesis and for the development of high yielding rice cultivars.

• 出版日期2006
• 单位浙江大学