Taxonomy of the Australian Nicotiana benthamiana complex (Nicotiana section Suaveolentes; Solanaceae): five species, four newly described, with distinct ranges and morphologies

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-09-29 DOI:10.1071/SB22009

Mark W. Chase, L. A. Cauz-Santos, S. Dodsworth, M. Christenhusz

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引用次数: 3

Abstract

ABSTRACT Although some authors previously questioned the circumscription of Nicotiana benthamiana, it has never been treated taxonomically as more than a single widespread, variable species. A recent study employing phylogenetic and population genetic analyses has demonstrated that N. benthamiana comprises five species that are geographically and morphologically distinct. Here, we describe four new species in the N. benthamiana complex, namely, N. bilybara M.W.Chase & Christenh., N. candelabra M.W.Chase & Christenh., N. rupestris M.W.Chase & Christenh. and N. scopulorum M.W.Chase & Christenh., and illustrate all five. We provide descriptions, a diagnostic key and a table of morphological characters distinguishing these closely related species. The major morphological feature that distinguishes N. benthamiana from the other four species is its petiolate leaves that become sessile only near the apex of the inflorescence; N. candelabra is distinct in its bifacial branching, N. bilybara in its commonly winged petiole with an auriculate base, N. rupestris in the leafy apices of its calyx lobes, and N. scopulorum is the least morphologically divergent species, conforming most closely to the general description of the N. benthamiana species complex.

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澳大利亚烟属benthamiana复合体(Nicotiana section Suaveolentes)的分类;茄科):五种，四种新描述，具有不同的范围和形态

虽然一些作者以前质疑本烟属的界限，但它从未在分类学上被视为不止一种广泛分布的可变物种。最近一项采用系统发育和种群遗传分析的研究表明，benthamiana由地理上和形态上不同的五个物种组成。在这里，我们描述了四个新物种在N. benthamiana复合体，即N. bilybara M.W.Chase & Christenh。m.w.蔡斯&克里斯登。N. rupestris M.W.Chase & Christenh。N. scopulorum M.W.Chase & Christenh。，并举例说明这五个方面。我们提供了描述，诊断关键字和形态学特征表区分这些密切相关的物种。benthamiana与其他四种植物的主要形态学特征是它的叶柄只有在花序顶端附近才变成无柄;烛台奈米在其双面分支上是独特的，胆bara在其通常有翅的叶柄上有耳状基部，rupestris在其花萼裂片的叶尖上，而scopulorum是形态上分歧最小的物种，最接近于benthamiana物种复合体的一般描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.