摘要
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.
The leaves of Quercus liaotungensis Koidz were collected from different altitudes of Kongtong Mountain in Gansu Province. Leaf traits, such as specific leaf area, trichome base density, stomatal length and stomatal density of Q. liaotungensis at different altitudes were determined to explore the physiological adaptation with altitudes of this species and provide a basis for paleoenvironmental reconstruction. The results showed that, along with the increasing altitudes, specific leaf area, stomatal length and stomatal density are fitted with quadric curves, while trichome base density is linear with increasing altitude. All the leaf traits displayed a significant transition at 1 935 m, which indicates that the region near this altitude is best for the growth of Q. liaotungensis in Kongtong Mountain. Above the altitude 1 935 m, low temperature gradually becomes the main environment factor for the growth of Q. liaotungensis.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第1期13-19,30,共8页
Journal of Lanzhou University(Natural Sciences)
基金
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)
关键词
辽东栎
叶表皮
海拔
崆峒山
叶特性
Quercus liaotungensis Koidz
leaf epidermis
altitude
Kongtong Mountain
leaf trait
