甘肃平凉崆峒山不同海拔梯度辽东栎叶特性变化Changes in leaf traits of Quercus liaotungensis Koidz at different altitudes in Kongtong Mountain of Gansu Province
李琪佳,赵振瑞,陈稳兴,王茂江,丁素婷,吴靖宇
摘要(Abstract):
以甘肃崆峒山不同海拔尺度上的辽东栎叶片为实验材料,对其比叶面积、毛基密度、气孔长度和气孔密度进行测定,探索海拔变化对崆峒山辽东栎生理形态的影响以及叶片解剖学特性对海拔梯度的适应性,从而为选择化石植物重建古环境提供依据.结果与分析表明:随海拔升高,比叶面积、气孔长度、气孔密度呈二元曲线关系,而毛基密度则呈一元线性关系;所有叶特征参数均在1 935 m处具显著转变,推测该海拔附近是崆峒山辽东栎的最佳生长区域;海拔1 935 m之上的区域,低温逐渐成为制约辽东栎生长的环境因素.
关键词(KeyWords): 辽东栎;叶表皮;海拔;崆峒山;叶特性
基金项目(Foundation): 国家自然科学基金项目(41302009);; 中国博士后科学基金(2011M500960);; 中国科学院南京地质古生物研究所现代古生物学与地层学国家重点实验室开放基金项目(133102)
作者(Author): 李琪佳,赵振瑞,陈稳兴,王茂江,丁素婷,吴靖宇
DOI: 10.13885/j.issn.0455-2059.2015.01.003
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