作物学报2011，Vol.37Issue(10)：1860-1867,8.DOI:10.3724/SP.J.1006.2011.01860
水稻叶色突变体的高光合特性
High Photosynthetic Efficiency of Leaf Colour Mutant of Rice (Oryza sativa L.)
摘要
Abstract
Biao 810S is a yellow-green leaf mutant of the thermosensitive genie male sterile (TGMS) rice which has higher photosynthetic rate. The photosynthetic characteristics of Biao 810S were studied with the wild type TGMS line 810S as a control to clarify the physiological basis of high photosynthetic efficiency and provide a theoretical basis for further utilization. The photosynthetic pigment, photosynthetic rate, fluorescence parameters and activity of photosynthetic key enzyme were measured. The content of photosynthetic pigment in Biao 810S was approximately half of that in 810S. However, the net photosynthetic rate of Biao 810S was higher than that of 810S under high intensity light and Biao 810S had no obvious "Midday depression" phenomenon. The stomatal conductance of Biao 810S was highly increased and the light quantum transformation efficiency was higher than that of 810S. The activity of ribulose-l,5-bisphosphate carboxylase (RuBPCase) in Biao 810S was 69.80% of that in 810S, but the activities of phosphoenolpyruvate carboxylase (PEPCase) and NADP-malic enzyme (NADP-ME) were 79.50% and 69.06% higher than those of 810S. The efficiency of light utilization in Biao 810S was enhanced by reduction of thermal dissipation and increase of electron transfer rate was generate sufficient assimilation power for the dark reactions. Consequently, the increased activities of PEPCase and stomatal conductance led to more effective fixation of CO2, and the synergistic effect of light reactions and dark reactions contributed to the higher photosynthetic rate of Biao 810S.关键词
水稻叶色突变体/光合特性/气孔导度/叶绿素荧光/光合酶Key words
Leaf colour mutant of rice/ Photosynthetic characteristics/ Stomatal conductance/ Chlorophyll fluorescence/ Photosynthetic enzyme引用本文复制引用
欧立军..水稻叶色突变体的高光合特性[J].作物学报,2011,37(10):1860-1867,8.基金项目
本研究由怀化学院民族药用植物资源研究与利用湖南省重点实验室项目(SYSXM200905)资助. （SYSXM200905）
