甘蔗叶片结构性状与抗寒性的关联  

Correlation between leaf structural traits and cold resistance in Saccharum officinarum L.

作　　者：王海玲 项伟 朱师丹 赵昊阳 段维兴[3] 朱俊杰[1,2] Wang Hai-Ling;Xiang Wei;Zhu Shi-Dan;Zhao Hao-Yang;Duan Wei-Xing;Zhu Jun-Jie(Guangxi University,State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources,Nanning 530004,China;College of Forestry,Guangxi University,Nanning 530004,China;Guangxi Academy of Agricultural Sciences Sugarcane Research Institute,Nanning 530007,China)

机构地区：[1]广西大学亚热带农业生物资源保护与利用国家重点实验室,南宁530004 [2]广西大学林学院,南宁530004 [3]广西农业科学院甘蔗研究所,南宁530007

出　　处：《植物科学学报》2021年第6期672-680,共9页Plant Science Journal

基　　金：国家自然科学基金(31460102,31901510);广西自然科学基金(2015-GXNSFAA139082)。

摘　　要：以广西农业科学院甘蔗(Saccharum officinarum L.)种质资源圃内收集自世界各蔗区的60份甘蔗育种材料为研究对象,对冬季低温时段凌晨光系统Ⅱ最大光化学效率(F_(v)/F_(m))进行测定,并采集叶片作解剖结构、比叶面积、机械强度等性状的检测,以分析其结构特征与抗寒性之间的关联性。结果显示:冬季最冷时段,60份材料中,有55份表现出明显的寒害(F_(v)/F_(m)<0.7),其中35份材料凌晨F_(v)/F_(m)值<0.6,受寒害较重;凌晨F_(v)/F_(m)与来源地最冷月最低温、冷季均温呈极显著线性负相关;F_(v)/F_(m)与叶肉组织厚度和机械强度(F_(p))呈极显著线性正相关。耐寒性较强的甘蔗育种材料,叶肉组织厚度、机械强度均较大,因此叶片机械强度可以作为甘蔗耐冷品种筛选的重要指标。In this study,we measured the predawn maximum photochemical efficiency of photosystemⅡ(F_(v)/F_(m))in the leaves of 60 sugarcane breeding materials during an extreme low-temperature period.We also measured leaf anatomical structure,specific leaf area(SLA),and leaf resistance to punch(F_(p)),and analyzed the correlation between structural traits and cold tolerance.Results showed that during the coldest period in winter,55 of the 60 samples showed cold damage(F_(v)/F_(m)<0.7),including 35 cultivars with F_(v)/F_(m)<0.6.F_(v)/F_(m) was negatively correlated with the lowest temperature in the coldest month and average temperature in the cold season of the source site of the breeding material.F_(v)/F_(m) was positively correlated with mesophyll thickness(MT)and leaf resistance to punch(F_(p)).We found that sugarcane cultivars with stronger cold tolerance had larger MT and F_(p).Thus,F_(p) could be used as an important index for screening cold tolerance in sugarcane cultivars.

关 键 词：甘蔗 抗寒性 叶片结构 机械强度 

分 类 号：Q945[生物学—植物学]