生态学报2017，Vol.37Issue(24)：8526-8536,11.DOI:10.5846/stxb201610132072
亚高寒草甸不同坡向植物光合生理和叶片形态差异
Studies on physiological and leaf morphological traits for photosynthesis on different slopes in a subalpine meadow
摘要
Abstract
The functional traits of plant leaves are considered to have significant effects on the survival,growth,and reproduction of plants.These traits are thus widely used to explain complex ecological processes at different levels.In this study,measurements of leaf morphological traits and photosynthesis taken from plants growing along typical slope aspect gradients in a subalpine meadow of Gannan were utilized to characterize the soil factors of each aspect,differences in plant species (Kobresia humilis,Gueldenstaedtia verna,Taraxacum lugubre,and Potentilla fruticosa),and correlations between the photosynthetic and morphological characteristics and soil factors.The following results were obtained (1) Soil factors were distinctly different on different slopes.Soil water content (SWC),soil total phosphorus (STP),soil total nitrogen (STN),and soil organic carbon (SOC) were generally higher on the northern slope (N) than on the southern slope (S),whereas soil temperature (ST) and light intensity (LI)were apparently greater on S than on N.(2) The specific leaf area (SLA),net photosynthetic rate (Pn),and leaf δ13C value were significantly different among the different plant species.SLA and leaf water content (LWC) were higher on N,where as Po,SPAD,leaf dry matter content (LDMC),and δ13C were higher on S.(3) Redundancy analysis showed a high correlation between leaf traits and soil factors.In particular,SWC showed the most sensitive response to change.This study revealed that the significant differences in plant leaf functional traits at different slope gradients in a subalpine meadow enables species to coexist in the same grassland community.关键词
亚高寒草甸/功能性状/叶片形态/光合生理特征/稳定碳同位素Key words
subalpine meadow/functional traits/leaf morphology/photosynthetic physiological characteristics/stable carbon isotope引用本文复制引用
刘旻霞..亚高寒草甸不同坡向植物光合生理和叶片形态差异[J].生态学报,2017,37(24):8526-8536,11.基金项目
国家自然科学基金项目(31360114) （31360114）
