低温胁迫下结球白菜的光合及叶绿素荧光特性  

Effects of Low Temperature on Photosynthetic and Chlorophyll Fluorescence Characteristics of Chinese Heading Cabbage

作　　者：彭剑涛[1] 赵大芹[2] 王天文[2] 周秋菊[1] 李桂莲[3] 

机构地区：[1]贵州大学生命科学学院,贵州贵阳550025 [2]贵州省园艺研究所,贵州贵阳550006 [3]贵州省农业科学院,贵州贵阳550006

出　　处：《西南农业学报》2014年第6期2345-2348,共4页Southwest China Journal of Agricultural Sciences

基　　金：贵州省农业攻关项目"结球白菜抗冻耐抽薹生理育种关键技术研究与应用"[黔科合NZ字(2012)3008];"黔白5号大白菜制种技术研究及示范"[黔科合NY字(2011)3033]

摘　　要：为揭示结球白菜低温抗性的机理,指导抗寒品种的选育和冬春淡季反季节生产,测定了黔白5号、早皇白、四季王(耐抽薹品种),81-1、C×38、3×C、3-4×C、小杂55(中等抽薹品种),贵蔬3号、亚春19(易抽薹品种)等10个结球白菜品种(品系)的光合及叶绿素荧光特性。结果表明:黔白5号的净光合速率(Pn)和气孔导度(Gs)均最大;耐抽薹品种的净光合速率、气孔导度和胞间CO2浓度(Ci)均高于易抽薹品种,且Pn和Ci主要受气孔因素影响。不同抽薹特性结球白菜品种的光系统II(PSII)最大光化学效率(Fv/Fm)差异不显著,而PSII实际光化学效率(Yield)与光合速率以及抽薹特性之间的关系较为一致,可作为判断结球白菜耐寒性的辅助指标。The photosynthetic and chlorophyll fluorescence characteristics of 10 Chinese heading cabbage varieties / lines was determined under low temperature to reveal the mechanism of cold resistance of Chinese heading cabbage and guide breeding of Chinese heading cabbage varieties with cold resistance and its out-of-season production. The net photosynthetic rate and stomatal conductance are the highest and the net photosynthetic rate,stomatal conductance and intercellular CO2 concentration of Chinese heading cabbage varieties with bolting tolerance are higher than varieties without bolting tolerance. The net photosynthetic rate and intercellular CO2 concentration of Chinese heading cabbage is affected by stomatal factors. There is no significant difference in maximum photochemistry efficiency（ Fv / Fm） of photosystem II（ PS II） between Chinese heading cabbage varieties with different bolting characteristics. The actual photochemistry efficiency can be used as the auxiliary index to judge its cold resistance due to its consistency with net photosynthetic rate and bolting characteristics.

关 键 词：结球白菜 抽薹特性 净光合速率 气孔导度 叶绿素荧光参数 

分 类 号：S641.1[农业科学—蔬菜学] Q945.78[农业科学—园艺学]