中国沙棘和俄罗斯沙棘叶片在不同土壤水分条件下脯氨酸、可溶性糖及内源激素含量的变化

Changes in Contents of Proline,Soluble Saccharin and Endogenous Hormone in Leaves of Chinese Seabuckthorn and Russian Seabuckthorn under Different Soil Water Content

通过对中国沙棘(Hippophaerhamnoidessinensis)和俄罗斯沙棘(Hippophaerhamnoides)在野外不同生境和田间不同干旱胁迫条件下叶片脯氨酸、可溶性糖及内源激素含量的变化进行研究后发现:坡上土壤水分含量显著低于沟底的土壤水分含量,坡上中国沙棘叶片中的脯氨酸、可溶性糖含量比沟底明显增加,雌株的增加幅度大于雄株。在田间不同的干旱胁迫条件下,沙棘叶片内脯氨酸含量随着干旱胁迫程度和干旱胁迫时间的延长而增加,脯氨酸积累能力为中国沙棘>俄罗斯沙棘,雌、雄株之间的差异为雌株>雄株。沙棘叶片内可溶性糖含量随着干旱胁迫程度和干旱胁迫时间的延长而持续增加,沙棘叶片可溶性糖的积累能力因雌雄株和品种不同而出现一定差异,表现为俄罗斯沙棘>中国沙棘,雌株>雄株。随着土壤含水量的降低,沙棘叶片中的ABA显著增加,IAA和ZR的含量明显降低,GA的含量在胁迫初期升高,之后逐渐下降;中国沙棘叶片内源激素的变化幅度小于俄罗斯沙棘,雌株的变化幅度小于雄株。综合沙棘叶片中脯氨酸、可溶性糖、内源激素的变化,在干旱的适应性方面,中国沙棘和沙棘雌株更具有优势。

Through analyzing the changes of proline,soluble saccharin and endogenous hormone contents in leaves of Chinese seabuckthorn and Russian seabuckthorn under drought stress,the results showed that the slope soil's water content is low than the gully, the proline content and the soluble saccharin content in leaves of Chinese seabuckthorn in the slope increased than it in the gully. In the field drought stress,the content of proline and soluble saccharin increased with decreasing of water content of the soil.The ability of accumulation of the proline of Chinese seabuckthornis more than of Russian seabuckthorn,and the female more than the male. The ability of accumulation of the soluble saccharin of Russian seabuckthorn is more than of Chinese seabuckthorn,and the female more than the male. The content of ABA increased with decreasing of water content of the soil.The content of IAA and ZR decreased with decreasing of the water content of soil.The content of GA increased in the initial stage of drought stress,then decreased after the initial stage. From the changes of proline content,soluble saccharin content,endogenous hormone content can conclude that the Chinese seabuckthorn and the female of seabuckthorn have high adaptability to water stress more than the Russian seabuckthorn and the male of seabuckthorn.