不同欧李品种(系)光合与水分利用特性比较

Comparasion of Photosynthetic and Water Use Characteristics of Different Varieties(Lines) in Prunus humilis

以9种不同欧李品种(系)为试材,使用GFS3000光合测定系统测定了自然条件下叶片的光合和水分利用特性。结果表明:9种欧李品种(系)的净光合速率(Pn)、叶片气孔导度(Gs)、胞间CO2浓度(Ci)、蒸腾速率(Tr)、蒸腾比率(TR)、水分利用效率(WUE)均存在差异;在新疆生产建设兵团第十四师二二四团的生长环境下,Pn与Gs、Tr、WUE呈极显著正相关关系,而与Ci、TR呈极显著负相关关系;Ci与TR呈极显著正相关相关关系,与WUE呈极显著负相关关系;Gs与Tr呈极显著正相关关系,与TR呈显著负相关关系;Pn最高的"宏宇Ⅵ号"其WUE较高,但不是最高;WUE最高的"宏宇Ⅰ号"其Pn较高,但不是最高;"01-01号"的Pn和WUE均最低,其它品种(系)的Pn和WUE均处于中等水平,不同的欧李品种(系)通过不同方式协调自身的光合和水分利用来适应生长的环境。

The measurement of leaf photosynthetic characteristics and water use characteristics of 9varieties（lines）in Prunus humilis was taken by GFS3000 photosynthesis system under natural condition.The results showed that net photosynthetic rate（Pn）,stomatal conductance（Gs）,intercellular CO2concentration（Ci）,transpiration rate（Tr）,transpiration ratio（TR）and water use efficiency（WUE）were different among 9varieties（lines）in Prunus humilis.Under the Regiment 224 cultivation condition,there was an extremely significant positive correlation between Pn and Gs,Tr,WUE,while an extremely significant negative correlation between Pn and Ci,TR.Ci had an extremely significant positive correlation with TR while an extremely significant negative correlation with WUE.Gs had an extremely significant positive correlation with Tr while a significant negative correlation with TR.HY-Ⅵhad the highest Pn and higher WUE,but its WUE was not the highest,while HY-Ⅰhad the highest WUE and higher Pn,but its Pn was not the highest.Pn and WUE of 01-01 were all the lowest and those of the other varieties（lines）were in the middle level.Different varieties（lines）adapted to growth environment by different ways of regulation of photosynthesis and water use in Prunus humilis.