杂交稻汕优63剑叶光合特性的研究

Study on Photosynthetic Characteristics of Hybrid Rice Shanyou63

对杂交稻汕优 6 3剑叶一生光合特性的研究表明 :RuBPCase活性及叶肉导度 (Gm)与净光合速率显著相关 ,它们的下降速度明显快于净光合速率及气孔导度 (Gs)、碳酸酐酶 (CA)活性、PSⅡ原初光化学效率 (Fv/Fm)、光化学猝灭 (qP)、全链电子传递速率 (ETR)等光合参数的衰退速率 .RuBPCase活性及叶肉导度 (Gm)

Photosynthetic characteristics of hybrid rice Shanyou63 were investigated. The results revealed that activity of RuBPCase and mesophyll conductance(Gm) were remarkably related to net photosynthetic rate ,and their declination rate were remarkably faster than that of some other photosynthetic parameters which were net photosynthetic rate ,stomatal conductance(Gs),activity of carbonic anhydrase(CA),photochemical efficiency of PSⅡ( Fv/Fm),photochemical quenching(qP),the whole electron transfer rate(ETR) etc. Therefore,the declination of Gm and activity of RuBPCase might be main reason that caused net photosynthetic rate to descend during the aging course of flag leaves.