生态学杂志2018，Vol.37Issue(9)：2611-2618,8.DOI:10.13292/j.1000-4890.201809.027
滇西北纳帕海湖滨带优势植物杉叶藻(Hippuris vulgaris L.)维管结构对模拟增温的响应
Response of vascular structure of a lakeside dominant plant species Hippuris vulgaris L. to simulated warming in Napahai wetland of Northwestern Yunnan
摘要
Abstract
Vascular structure is the main transport structure of plants,which plays an irreplaceable role in the processes of plant photo-accumulation,growth and development,adaption to changes, reproduction and dispersal. Temperature is an important environmental factor affecting vascular structure. How temperature affects the vascular structure of wetland plants,however,is not well understood. In this study,we studied the responses of vascular structure of a lakeside dominant plant species Hippuris vulgaris L. to simulated warming,by using open-top growth chambers ( OTCs) in Napahai basin. Napahai basin is a typical plateau wetland in Northwestern Yunnan and belonged to the temperature-sensitive area. The results showed that warming had greater effects on the vascular structure of the aboveground stem,but had less influence on that of the underground stem. For the aboveground stem,warming significantly promoted the number and size of catheters and screens,and the size of vascular bundle,but with minor effects on the density of catheters and screens. In contrast,warming significantly reduced the size of conduits and screens in underground stem,but both traits didn't show significant differences between the two warming treatments. Warming had no effects on other traits of vascular structure in underground stem. The mean annual temperature ( MAT) and mean daily temperature ( MDT) were the main factors affecting vascular traits,both of which had positive correlations with all the vascular traits. Our results indicated that climate warming obviously affected the transmission capacity of vascular structures of lakeside dominant plants in the plateau wetland of Northwestern Yunnan,which may lead to changes in physiological functions of plants and thus facilitate plant adaption to the warming environment.关键词
滇西北高原/大气增温/维管结构/传输能力Key words
Northwestern Yunnan Plateau/atmospheric warming/vascular structure/transmission capacity引用本文复制引用
管东旭,田昆,王志保,张依南,冯春慧,孙梅..滇西北纳帕海湖滨带优势植物杉叶藻(Hippuris vulgaris L.)维管结构对模拟增温的响应[J].生态学杂志,2018,37(9):2611-2618,8.基金项目
国家自然科学基金项目( 31760115) 、云南省高原湿地创新团队( 2012HC007) 、云南省科技计划项目( 2017FD103) 和西南林业大学科研启动基金项目( 111706) 资助. （ 31760115）
