摘要
以沟叶结缕草和结缕草为材料,测定了两种结缕草在低温胁迫下叶片主要抗性生理指标及其内源激素的变化,结果表明:在低温胁迫下,两种结缕草叶片可溶性糖、可溶性蛋白质和脯氨酸含量都显著增加,叶片SOD、POD和CAT三种酶活性和MDA含量都有不同程度增强或增加,其中沟叶结缕草叶片可溶性糖和脯氨酸含量及SOD和CAT值增幅均大于结缕草,表现出更强的生长优势;低温对两种结缕草叶片的类胡萝卜素(Car)含量,叶绿素a(Chla)、叶绿素b(Chlb)以及Chla/Chlb的比值也产生了较大的影响。在低温胁迫下,两种结缕草叶片内ABA含量增加,GA3含量下降,抑制类激素ABA含量与促进类激素GA3I、AA和ZR含量总和的比值升高,IAA和ZR含量则表现为10℃时增加,0℃时减少。
The experiment was conducted to investigate the effect of low temperature on the resistant physiology in Zoysia matrella and Z. japonica. The results showed that the contents of soluble sugar, soluble protein, proline and MDA was increased in the two turfgrass species, and the activities of SOD, POD and CAT in the leaves of the two species were increased. However, Z. matrella had higher contents of soluble sugar and proline, and performed the stronger activities of SOD and CAT than the other turfgrass , so it grew better than Z. japonica under low temperature stress. It was also found that low temperature notably affected contents of carotenoid （Car）, chlorophyll a （Chla） , and chlorophyll b （Chlb） and ratio of Chla to Chlb. The content of ABA and the ratio of ABA to （GA3 ＋IAA＋ZR） in the leaves of the two species increased under low temperature. The contents of IAA and ZR increased under 10℃, but decreased under 0℃.
出处
《中国草地学报》
CSCD
北大核心
2009年第1期64-69,108,共7页
Chinese Journal of Grassland
基金
福建省生态学重点学科(0608537)资助
关键词
结缕草
低温胁迫
酶活性
内源激素
Zoysia grass
Low temperature stress
Enzyme activity
Endogenous hormones
