低温胁迫下结缕草生理指标变化研究  

Physiological Index Changes of Zoysia japonica under Low-Temperature Stress

作　　者：王娟[1] 陈萍[1] 罗园园 卜建华[1] 谢静波[1] Wang Juan;Chen Ping;Luo Yuanyuan;Bu Jianhua;Xie Jingbo(Agriculture,Forestry and Animal Husbandry Technology Extension Service Center for Ningxia Agricultural Reclamation Bureau,Yinchuan,Ningxia 750021)

机构地区：[1]宁夏农垦农林牧技术推广服务中心,宁夏银川750021

出　　处：《宁夏农林科技》2020年第12期4-7,共4页Journal of Ningxia Agriculture and Forestry Science and Technology

摘　　要：研究选取3种常用结缕草——日本结缕草“Meyer”、沟叶结缕草“马尼拉”和日本细叶结缕草“胶东青”为材料,通过生理指标的测定,比较不同结缕草对低温胁迫的生理调节差异,分析结缕草可能的冷响应机制。结果表明:3种结缕草在4℃低温胁迫下叶组织相对电导率和MDA含量上升,相对含水量下降,脯氨酸和可溶性糖的浓度上升。与日本结缕草种质相比较,低温胁迫72 h“马尼拉”叶组织的相对电导率和MDA含量上升幅度、相对含水量降幅最大,脯氨酸和可溶性糖的浓度最高。分析推测出叶组织持水能力下降、细胞膜损伤是结缕草对低温胁迫敏感的主要因素之一。Three common Zoysia japonicas were taken as the study objects:Japanese zoysia"Meyer",Zoysia matrella and Zoysia japonica var.pallida cv Jiaodong.The possible cold response mechanisms of were analyzed by measuring their physiological indexes and comparing their physiological regulation differences under low-temperature stress.The results indicated that for the three kinds of Zoysia japonicas,the leaf relative electrical conductivities and MDA contents increased under the low-temperature stress of 4℃,the relative water contents decreased,and the concentrations of proline and soluble sugar went up.Compared with the germplasm of the Japanese Zoysia japonica,under 72-h low-temperature stress,"Meyer"had thelargest increase in the leaf relative electrical conductivity and MDA contents,the biggest drop in the relative water content and the highest concentrations of proline and soluble sugar.It could be found out that the decrease in water-holding capacity of the leaf tissue and membrane damage are main factors affecting the Zoysia japonica's sensitive to low temperature stress.

关 键 词：结缕草 低温胁迫 抗寒性 生理指标 

分 类 号：S688.4[农业科学—观赏园艺]