不同海拔车桑子叶片功能性状的比较  

Leaf Functional Traits of Dodonaea viscosa at Different Altitudes

作　　者：徐倩[1] 杨济达 张志明[1] 苏文华[1] 

机构地区：[1]云南大学生态学与地植物学研究所,云南昆明650091

出　　处：《西部林业科学》2017年第1期65-69,78,共6页Journal of West China Forestry Science

基　　金：国家自然科学基金项目(31160092)

摘　　要：植物叶片的性状是植物功能性状的重要组成部分,叶片的功能性状能够反映植物对外部环境的适应机制。车桑子是植被恢复工程中常见植物,本文以元谋两个海拔不同地区(海拔2 000m和海拔1 100m)的车桑子叶片为实验材料,测定其电解质渗透率、比叶重、叶干物质含量、叶厚度、含水率,比较分析以上各功能性状在不同海拔间的差异。结果表明:海拔2 000m和海拔1 100m处车桑子叶片的电解质渗透率(PEL)分别为39.96%和32.67%,叶干物质含量(LDMC)分别为597.41kg/m^3和463.39kg/m^3,比叶重(LMA)分别为118.74g/m^2和105.35g/m^2,叶片厚度(LT)分别为0.20mm和0.23mm,叶片含水率(LWC)分别为52.64%和56.55%。随海拔的升高,车桑子叶片PEL有增加的趋势,LWC有减小的趋势,海拔2 000m处的车桑子叶片LAM、LDMC比海拔1 100m车桑子叶片高,LT比海拔1 100m车桑子叶片低。海拔1 100m处的车桑子叶片抗旱性和抗寒性更好。Leaf functional traits is one of the important part of plant functional traits. Plant functional traits are closely related to environment, and the leaf functional traits can respond to and adapt to environmental changes. Dodonaea viscosa is a common plant in ecological engineering. We measured the percentage of electrolyte leakage （ PEL）, leaf mass per area （ LMA）, leaf dry matter content （ LDMC）, leaf thickness （ LT）, leaf water content （LWC） in leaves of Dodonaea viscosa from two different altitudes in Yuanmou, and analyzed the difference of all this index between these two altitudes. The results showed that PEL were 39.96% and 32.67% , LDMC were 597. 41kg/m3and 463. 39kg/m3, LAM were 118. 74g/m2 and 105.35g/m2, LT were 0. 20mm and 0. 23ram, LWC were 52.64% and 56.55% in leaves of Dodonaea viscosa at 2 000m and 1 100m respectively. With the increase of altitude, PEL showed a rising trendeney and LWC showed a decreasing tendency. At 2 000m, the LMA and LDMC were higher than those at 1 100m, the LT was lower than that at 1 100m. The leaves at 1 100m has higher resistance to drought and cold.

关 键 词：车桑子 电解质渗透率 比叶重 叶干物质含量 叶厚度 含水率 

分 类 号：S792.99[农业科学—林木遗传育种]