若尔盖高寒草本沼泽木里薹草叶片气孔和解剖性状对模拟增温的响应  

Responses of Leaf Stomata and Anatomical Characters of Carex muliensis to Simulated Warming in an Alpine Marsh on the Ruoergai Plateau

作　　者：申金阳 陈天松 董李勤[3] 张昆[1,2] SHEN Jinyang;CHEN Tiansong;DONG Liqin;ZHANG Kun(Yunnan Key Laboratory of Plateau Wetland Conservation,Restoration and Ecological Services,Southwest Forestry University,Kunming Yunnan 650224,P.R.China;National Plateau Wetlands Research Center,College of Wetlands,Southwest Forestry University,Kunming Yunnan 650224,P.R.China;School of Geography and Ecotourism,Southwest Forestry University,Kunming Yunnan 650224,P.R.China)

机构地区：[1]西南林业大学,云南省高原湿地保护修复与生态服务重点实验室,云南昆明650224 [2]西南林业大学湿地学院,国家高原湿地研究中心,云南昆明650224 [3]西南林业大学地理与生态旅游学院,云南昆明650224

出　　处：《西部林业科学》2023年第5期76-83,共8页Journal of West China Forestry Science

基　　金：国家自然科学基金(41101097和41461022);云南省院士专家工作站(2019IC012);云南省基础研究专项(202001AT070132);云南省教育厅基金项目(2018JS3和2019J0184)。

摘　　要：以若尔盖高寒草本沼泽为研究区域(对象),采用开顶式装置模拟大气增温方法,探究木里薹草叶片气孔和解剖性状对增温的响应策略。结果显示:(1)增温后,植物叶片上表皮的气孔长宽比显著减少11.29%;植物叶片下表皮气孔的面积显著增加了7.38%;上、下表皮的气孔数量各显著减少了32.46%、15.89%;上表皮的气孔密度显著下降了32.41%;维管束面积显著下降了33.55%,导管面积显著下降了39.91%,叶片厚度显著增加了34.52%。(2)下表皮的孔隙度、叶片厚度和上表皮气孔宽度与各温度变量均为显著正相关,表皮气孔长宽比、下表皮的气孔数量、导管面积都与各温度变量呈现显著负相关。(3)各温度变量中,夜间平均温度对下表皮孔隙度的影响最为显著;日间平均温度对上表皮的气孔宽度、叶片厚度、上表皮的气孔长宽比、下表皮的气孔数量和导管面积的影响最为显著。研究结果表明:温度上升显著影响木里薹草的叶片气孔和解剖形态特征,体现了若尔盖高寒高原湿地植物叶片形态对气候变暖的适应策略。Took the alpine herbaceous swamp in Zoige as the research area,and used an open-top device to simulate atmospheric warming to investigate the response strategies of stomatal and anatomical characteristics of Carex muliensis leaves to warming.The results showed that:(1)After warming,the length-to-width ratio of the upper epidermal stomata decreased significantly by 11.29%(P<0.05);the area of the lower epidermal stomata increased significantly by 7.38%(P<0.05);the number of stomata on both the upper and lower epidermis were significantly reduced by 32.46%and 15.89%,respectively(P<0.01);the stomatal density of the upper epidermis decreased significantly by 32.41%(P<0.01);the vascular bundle area and conduit area decreased significantly by 33.55%and 39.91%,respectively(P<0.01),and leaf thickness increased significantly by 34.52%(P<0.01).(2)The pore density of the lower epidermis,leaf thickness,and width of the upper epidermal stomata were positively correlated with all temperature variables(P<0.05),while the length-to-width ratio of stomata on the upper epidermis,the number of stomata on the lower epidermis,and the conduit area were negatively correlated with all temperature variables(P<0.05).(3)Among all temperature variables,the nighttime average temperature had the most significant effect on the pore density of the lower epidermis,while the daytime average temperature had the most significant effect on the width of upper epidermal stomata,leaf thickness,length-to-width ratio of upper epidermal stomata,number of stomata on the lower epidermis,and conduit area.The results of this study indicate that rising temperatures significantly affect the stomatal and anatomical characteristics of C.muliensis leaves,and reflect the adaptive strategies of plant leaf morphology to climate warming in alpine wetlands in Zoige.

关 键 词：叶气孔性状 叶解剖性状 增温 沼泽 木里薹草 

分 类 号：Q945[生物学—植物学] S812[农业科学—草业科学]