中国锥属(壳斗科)一新记录种——巨盘锥
Castanopsis grandicicatricata N.H.Xia & D.H.Vuong:A newly recorded species of Castanopsis(Fagaceae)from China
林毅喆 1付厚华 1陈世品1
作者信息
- 1. 福建农林大学林学院,福州 350002
- 折叠
摘要
[目的]巨盘锥(Castanopsis grandicicatricata)是原产于越南中、北部的壳斗科锥属植物,现于云南屏边苗族自治县大围山地区发现一零星分布的居群.为确定该种的身份,检验原始文献基于形态学推测的近亲,并展示该种所处的系统地位.[方法]利用细胞核rRNA基因5.8S、26S间隔区ITS2与叶绿体基因rbcL分子标记重建系统树.[结果]形态上,该种壳斗4.5～6.0 cm,刺树状分枝,坚果扁球形,果脐占坚果表面积2/3,与中国已知锥属均不同.分子系统树支持形态学推测,湄公锥(C.mekongensis)是其近缘种之一.[结论]巨盘锥是中国锥属一新记录种,这对于研究中国滇东南与越南北部植物区系有重要的意义.
Abstract
[Objective]Castanopsis grandicicatricata N.H.Xia &D.H.Vuong is a species of Castanop-sis(Fagaceae)originally endemic to central and northern Vietnam,but now a scattered population was discovered in the Dawei Mountain area of the Pingbian Miao Autonomous County,Yunnan Province,Chi-na.This study aims to check its identity,to verify the close relatives from the literatures based on mor-phological speculation,and to show its systematic status.[Methods]Spacer ITS2 of nuclear rRNA genes 5.8S and 26S and chloroplast gene rbcL were used as molecular markers to reconstruct systematic tree.[Results]Morphologically,it could be distinguished from other Castanopsis species known in China by its cupule of 4.5-6.0 cm in diameter and the spine base was connate into tree-like branched bundles with a spheroid nut,where scar covering ca.2/3 of the nut.The morphology-based speculation of the close rela-tives reported in the literatures was validated through phylogenetic tree restruction,C.mekongensis is one of its close relative.[Conclusion]C.grandicicatricata is a newly recorded species of Castanopsis from China.This new record holds significant implication for the study of the flora of southeast Yunnan and northern Vietnam.
关键词
锥属/壳斗科/中国新分布Key words
Castanopsis/Fagaceae/new distribution in China引用本文复制引用
基金项目
福建农林大学林学高峰学科建设项目(72202200205)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据