Anatomy of the adventitious roots of Philodendron (Araceae) and its importance for the systematics of the genus

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-02-05 DOI:10.1071/SB18038

Rafaela de Oliveira Ferreira, Ana Cristina Campos Borges, Juan Augusto Rodrigues dos Campos, Artur Manoel Leito Medeiros, C. M. Sakuragui, Ricardo Cardoso Vieira, V. Tenorio

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Abstract

Abstract. The genus Philodendron Schott comprises the following three currently accepted subgenenera: P. subg. Philodendron, P. subg. Pteromischum and P. subg. Meconostigma; however, these lack a well-defined classification. In the present study, we examined anatomically samples of adventitious roots in species of the group, so as to establish aspects relevant for taxonomic purposes. The anatomical analyses emphasised the characteristics of the steles in cross-sections of the root samples from regions near the apex to the most mature zones. A species of a closely related genus Adelonema, namely A. crinipes, was included in the study to clarify the results. Our results indicated notable differences in the species of the subgenus Meconostigma, mainly in terms of the presence (and variations) of a lobed stele, whereas the cylindrical stele stood out among the common characteristics in P. subg. Philodendron, P. subg. Pteromischum and the related species A. crinipes. Moreover, the characteristics shared by P. subg. Philodendron and P. subg. Pteromischum corroborated the phylogenetic hypothesis that these two taxa were more closely related to one another than to P. subg. Meconostigma.

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天南星科飞毛莲不定根的解剖及其对该属分类学的重要性

摘要黄花菜属包括以下三个目前公认的亚属:黄花菜亚属;黄花菜，P. subg。翼龙属和翼龙属。Meconostigma;然而，它们缺乏定义良好的分类。在本研究中，我们检查了不定根的解剖学样本在该组的物种，以便建立有关方面的分类学目的。解剖分析强调了从接近顶端的区域到最成熟区域的根样本横截面上的石柱特征。为了澄清结果，研究中还包括了一种密切相关的阿德龙属，即A. crinipes。我们的研究结果表明，绿柱头亚属的种间存在显著差异，主要表现在叶状柱头的存在(及其变异)上，而柱状柱头在绿柱头亚属的共同特征中较为突出。黄花菜，P. subg。蕨类植物及其近缘种。此外，P. subg。黄花菜和黄花菜。Pteromischum证实了这两个分类群之间的亲缘关系比与P. subg亲缘关系更近的系统发育假说。Meconostigma。

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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.