摘要
以广西桂林、安徽合肥及辽宁沈阳等三地的银杏材料为基础,通过对叶片及叶柄微观形态特征的对比研究,探讨银杏对不同气候带气候条件的响应。结果显示部分微观特征随气候带的变化而发生较为明显的变化。其中,气孔器长度和保卫细胞长宽比随纬度增加而减小,垂周壁宽度、普通表皮细胞长宽比及保卫细胞宽度随纬度增加有不同程度的增大。这些特征与其所生长环境中的湿度和降水因素可能有较大关系,并为地史时期银杏化石的相关古气候研究提供参考资料。
Based on Ginkgo materials from Guilin of Guangxi,Hefei of Anhui and Shenyang of Liaoning,the authors studied the response of Ginkgo to climatic condition in different climatic zones through the contrast of microscopic morphological characters of Ginkgo leaves and petioles.The results show that some microscopic characters varied greatly in different climatic zones.The stomatal length and the ratio of length to width of guard cells decreased with the increase of latitude,and the anticlinal wall width,the ratio of length to width of ordinary epidermal cells and the width of guard cells increased with the increase of latitude.These characteristics changes may respond to the variations of temperature and precipitation of their living environment,which benefits the study of paleoclimate indicated by fossil Ginkgo through the geological time.
出处
《世界地质》
CAS
CSCD
2010年第4期543-547,共5页
World Geology
基金
高等学校博士学科点专项科研基金(200801831115)
现代古生物学和地层学国家重点实验室开放基金(103107)联合资助
关键词
银杏叶
角质层
微观特征
气候带
古气候
Ginkgo leaf
cuticle
microscopic characters
climatic zone
paleoclimate