|作者： 古丽江·许库尔汗 孙雅丽 阿依古丽·铁木儿 刘 珩|
|单位： （新疆林业科学院 乌鲁木齐 830000）|
|关键词： 越橘 干旱胁迫 光合参数 生理指标 新疆|
|出版年,卷(期):页码：2015 ,46 ( 12 )： 页码：2153-2158|
【Objective】The present experiment was conducted to investigate photosynthetic physiological responses of different Vaccinium spp. under drought conditions in Xinjiang ，and screen out Vaccinium spp. adapted to arid climate conditions in Xinjiang， in order to provide reference for industrial development of Vaccinium spp. in Xinjiang. 【Method】Five Vaccinium spp. viz.， Northland， Blomidon， Beichun， Chippewa and Ruika were potted under different soils drought stress conditions viz.， control， mild drought stress， moderate drought and heavy drought（absolute water contents of soils was 25.00%， 20.00%， 15.00% and 10.00%）. Then the photosynthetic parameters of leaves and physiological indexes were determined to analyze drought resistant ability. 【Result】Among all photosynthetic parameters of leaves， as the drought stress was intensified， the net photosynthetic rate（Pn）， transpiration rate（Tr）， stomatal conduction（Gs） of various varieties were gradually decreased. And the Pn of 4 varieties viz.， Northland， Blomidon， Chippewa and Ruika were minus values， which were extremely significantly lower than those of control， respectively （P<0.01， the same below）. Moreover， the Tr of Blomidon， Beichun， Chippewa and Ruika were extremely significantly lower than those of control， respectively. The five blueberry varieties leaves were ranked in order of Gs， as follows：Beichun>Ruika>Chippewa=Blomidon>Northland， which were extremely significantly lower than control. And the intercellular CO2 concentrations（Ci） in leaves of five varieties presented increasing trend， which were extremely significantly higher than those of control. However， the Ci in leaves of Beichun rose at the slowest rate， that in leaves of Northland leaves declined at the fastest rate. Furthermore， except for Beichun， the water use efficiencies（WUE） of tested cultivars reduced to minus value， which were significantly lower than those of control. With the intensification of drought stress， the chlorophyll content in leaves of Ruika was higher than that of control， and that in leaves of Chippewa was higher than that of control， but both changed in a small range， compared with that of control. In addition， the soluble sugar content of each variety rose slowly. The relative conductivity of Blomidon， Beichun and Chippewa leaves increased more quickly than other varieties. Malondialdehyde（MDA） contents of Northland， Chippewa， Beichun， Blomidon and Ruika firstly decreased and then increased. 【Conclusion】Three Vaccinium spp. viz.， Chippewa， Northland， Beichun can tolerate heavy drought stress， and have significantly higher drought tolerance than Northland and Ruika. Therefore， these three varieties are suited to facility cultivation and potted cultivation in Xinjiang.