草业学报2012，Vol.21Issue(6)：42-50,9.
青藏高原东部4科植物种子大小和比叶面积随海拔和生境的变异
Variation of seed mass and SLA of 63 plant species in different habitats at various altitudes on the eastern Qinghai-Tibet Plateau
摘要
Abstract
Seed mass and specific leaf area (SLA) are two representative parameters of plant reproductive traits and vegetative traits, both of which are important parts of plant life-histories. We measured the seed mass and SLA of 63 plant species from four families (Saxifragaceae, Gentianaceae, Ranunculaceae and, Caryophyllaceae) on the eastern Qinghai-Tibet Plateau and studied how altitude and habitat influenced them. 1) The relationship between seed mass and SLA -was marginally significantly negative (P = 0. 066). 2) Seed mass was not correlated with altitude (P>0. 05) in the four families as a whole and in Ranunculaceae and Gentianaceae, but was significantly negatively correlated with altitude in the other two families. The habitats had no effect on seed mass when considered alone, but had significant effects when combined with altitude. 3) SLA significantly decreased with altitude in all four families and in Ranunculaceae and Gentianaceae but not in other two families. 4) Moreover, SLA was biggest in the meadow and least in the forest. SLA significantly decreased with altitude in the meadow, but not in other habitats. The variation of the two traits showed an active response or adaptation of the plant to the harsh environment on the eastern Qinghai-Tibet Plateau.关键词
海拔/生境/青藏高原/种子大小/比叶面积Key words
seed mass/ SLA/ altitude/ habitat/ Qinghai-Tibet Plateau分类
农业科技引用本文复制引用
齐威,郭淑青,崔现亮,阳敏,张永东,杜国祯,卜海燕..青藏高原东部4科植物种子大小和比叶面积随海拔和生境的变异[J].草业学报,2012,21(6):42-50,9.基金项目
兰州大学中央级公益性科研院所基本科研业务专项资金(lzujbky-2011-38),国家自然科学基金重点项目(40930533)和国家自然科学基金面上项目(41171046)资助. （lzujbky-2011-38）
