三除一:修订了蕨类植物Gymnosphaera salletii (Cyatheaceae)的种界,特别提到了叶面蜜腺

IF 2.3 2区 生物学 Q2 PLANT SCIENCES
Shu-Han Li, Zheng-Yu Zuo, Cheng-Wei Chen, Van The Pham, Hong Truong Luu, Shi-Yong Dong
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引用次数: 0

摘要

本文从分子和形态学的角度证明了越南鳞片树蕨类植物Gymnosphaera salletii是三个不同种的组合,并首次报道了在Gymnosphaera中存在叶面蜜腺。根据叶柄上存在的突起腺体,真正的沙莱草在形态上是独特的。Gymnosphaera phankelocii sp. 11和gymnosphaeravanicensis sp. 11被认定为新种;其特征是其远的两排梭状叶,越南G.的特征是其近三羽状叶。我们的系统发育分析表明,平氏革氏菌是一个相对孤立的物种,而越南革氏菌与南氏革氏菌、沙氏革氏菌和沙氏革氏菌是沙氏革氏菌分支的成员。这两个新种及其分支成员均为本地特有物种,为了解鳞片蕨类植物中常见的本地特有物种及其进化提供了很好的例证。我们为这些物种提供了诊断钥匙。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Three out of one: revising the species delimitation of the tree fern Gymnosphaera salletii (Cyatheaceae), with particular reference to the foliar nectary
Abstract In Indochina the species diversity of Cyatheaceae remains insufficiently known. Here we demonstrate the scaly tree fern Gymnosphaera salletii in Vietnam to be an assemblage of three distinct species based on molecular and morphological data, and report for the first time the occurrence of foliar nectaries in Gymnosphaera. The true G. salletii is morphologically unique based on the protuberant glands present on the petiole. Gymnosphaera phankelocii sp. nov. and Gymnosphaeravietnamensis sp. nov. are recognized as new species; G. phankelocii is characterized by its distant two-rowed sori and G. vietnamensis by the sub-tripinnate fronds. Our phylogenetic analyses indicated that G. phankelocii is a relatively isolated species, while G. vietnamensis is a member of the G. salletii clade along with G. austroyunnanensis, G. salletii, and G. saxicola. The two new species and members of the G. salletii clade are all local endemics, and provide good examples to understand the frequent local endemics and their evolution in scaly tree ferns. Eleven species of Gymnosphaera are now known from Indochina; we provide a diagnostic key to these species.
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来源期刊
CiteScore
5.70
自引率
8.30%
发文量
54
审稿时长
3.5 months
期刊介绍: The Botanical Journal of the Linnean Society publishes original papers on systematic and evolutionary botany and comparative studies of both living and fossil plants. Review papers are also welcomed which integrate fields such as cytology, morphogenesis, palynology and phytochemistry into a taxonomic framework. The Journal will only publish new taxa in exceptional circumstances or as part of larger monographic or phylogenetic revisions.
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