甘蔗叶片结构性状与抗寒性的关联

doi:10.11913/PSJ.2095-0837.2021.60672

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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。

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	王海玲
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	段维兴
	朱俊杰

关键词 ：甘蔗, 抗寒性, 叶片结构, 机械强度

Abstract：

In this study, we measured the predawn maximum photochemical efficiency of photosystem Ⅱ (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.

Key words： Saccharum officinarum L. Cold resistance Anatomical structure Leaf resistance to punch

收稿日期: 2021-05-06

ZTFLH:

Q945

基金资助:

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

通讯作者: 朱俊杰,E-mail:20150067@gxu.edu.cn E-mail: 20150067@gxu.edu.cn

作者简介: 王海玲(1995-),女,硕士研究生,研究方向为植物生理生态(E-mail:1615008818@qq.com)

引用本文:

王海玲, 项伟, 朱师丹, 赵昊阳, 段维兴, 朱俊杰. 甘蔗叶片结构性状与抗寒性的关联[J]. 植物科学学报, 2021, 39(6): 672-680. WANG Hai-ling, XIANG Wei, ZHU Shi-dan, ZHAO Hao-yang, DUAN Wei-xing, ZHU Jun-jie. Correlation between leaf structural traits and cold resistance in Saccharum officinarum L.. Plant Science Journal, 2021, 39(6): 672-680.

链接本文:

http://www.plantscience.cn/CN/10.11913/PSJ.2095-0837.2021.60672 或 http://www.plantscience.cn/CN/Y2021/V39/I6/672

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