茎芥菜胞质四倍体白菜雄性不育系及其保持系光合特性比较  

Comparison of photosynthesis characteristics in 4xMtCMS and its maintainer lines of non-heading Chinese cabbage

作　　者：钟程[1,2] 孔艳娥[2] 田鑫[3] 张蜀宁[2] 

机构地区：[1]凯里学院环境与生命科学学院,贵州凯里556011 [2]南京农业大学园艺学院,江苏南京210095 [3]南京农业大学农学院,江苏南京210095

出　　处：《广东农业科学》2012年第20期21-24,共4页Guangdong Agricultural Sciences

基　　金：贵州省科学技术基金(黔科合J字[2012]2301号)

摘　　要：以茎芥菜胞质四倍体白菜雄性不育系4xMtCMS及其保持系为材料,采用Li-6400型便携式全自动光合测定系统测定叶片的光合特性。结果表明,4xMtCMS和保持系叶片叶绿素含量、净光合速率(Pn)、气孔导度(Gs)、胞间CO2浓度(Ci)、水分利用率(WUE)均有差异,但两者的日变化趋势一致。保持系的Pn、Gs、Ci、光饱和点(LSP)、光补偿点(LCP)、CO2饱和点(CSP)、CO2补偿点(CCP)均高于4xMtCMS,而表观量子效率(AQY)、羧化效率(CE)低于4xMtCMS。4xMtCMS的叶绿素a、叶绿素b、总叶绿素含量和叶绿素/类胡萝卜素比值均低于其保持系,而叶绿素a/b、类胡萝卜素含量高于保持系。The photosynthesis characteristics in 4xMtCMS and its maintainer line were measured by using the Li-6400 portable photosynthesis system in this paper.The results showed that the contents of chlorophyll a,chlorophyll b,chlorophyll（a＋b） and chlorophyll/carotenoid were lower in 4xMtCMS than that in maintainer line,but the content of carotenoid and chl a/chl b in 4xMtCMS was higher than that of its maintainer line.The chlorophyll content,net photosynthetic rate（Pn）,stomatal conductance（Gs）,intercellular CO2 concentration（Ci） and water use efficiency（WUE） in 4xMtCMS and its maintainer line were different,but their changes along with the diurnal changes were the same approximately.The Pn,Gs,Ci,LSP,LCP,CSP and CCP of 4xMtCMS were significantly lower than that of its maintainer line,but the AQY and CE of 4xMtCMS were higher than its maintainer line.

关 键 词：不结球白菜 光合特性 茎芥菜胞质雄性不育 

分 类 号：S634.33[农业科学—蔬菜学]