Floral indumentum of Miconia: in search of diagnostic characters for the tribe Miconieae

IF 0.8 4区环境科学与生态学 Q4 BIODIVERSITY CONSERVATION

Revista Mexicana de Biodiversidad Pub Date : 2023-10-31 DOI:10.22201/ib.20078706e.2023.94.5272

Raisa Gonçales, Amanda Aparecida O. do Carmo, Anderson F. dos Santos, Luiz Antonio de Souza

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引用次数: 0

Abstract

The tribe Miconieae was composed of a few genera, such as Miconia, Clidemia, Leandra, and Ossaea, but recent works have recognized Miconia as the only genus of the tribe. The morphological diversity of trichomes in Melastomataceae have been employed for systematic purposes, especially the foliar indumentum. In the present paper, hypanthium trichomes of 24 species of Miconieae were investigated, 8 species of Miconia sensu stricto and 16 species of Leandra, as a contribution to the taxonomy of the tribe. Samples were obtained from herbarium and plant specimens collected in a state park in Paraná, Brazil. The hypanthium indumentum of the samples was analyzed using a scanning electron microscope. Our results revealed that long-peduncle stellate trichomes appear only within Miconias.s., while dendritic eglandular trichomes and glandular trichomes appear only in Leandra. Mixed trichomes with a lateral gland are less frequent and were found in both genera. It is not surprising, therefore, that the hypanthia of the investigated species possess indumentum of potential taxonomic significance. The characters of the indumentum of Miconia s.s., and Leandra may be useful in the infrageneric taxonomy of the new proposal for the tribe Miconieae.

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Miconia的花被:寻找miconiae族的诊断特征

Miconieae由Miconia、Clidemia、Leandra和Ossaea等几个属组成，但最近的研究已经确认Miconia是该部落的唯一属。毛状体的形态多样性已被用于系统研究，尤其是叶面毛被。本文对Miconieae属24种、sensu stricto属8种、Leandra属16种的杯毛进行了研究，为Miconieae属的分类学做出贡献。样本来自于巴西帕拉纳一个州立公园的植物标本室和植物标本。用扫描电镜对样品的托杯绒毛进行了分析。我们的研究结果显示，长柄星状毛状体只出现在miconiass .s.。而枝状腺毛和腺毛只出现在Leandra。具有侧腺的混合毛较少，在两属中都有发现。因此，所调查物种的托杯具有潜在的分类意义并不奇怪。Miconia s.s.和Leandra的文献特征可能对Miconieae部落新建议的属内分类有帮助。

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来源期刊

Revista Mexicana de Biodiversidad 环境科学-生物多样性保护

CiteScore

1.50

自引率

11.10%

发文量

审稿时长

12-24 weeks

期刊介绍： Revista Mexicana de Biodiversidad appears in 4 issues per year and publishes the products of original scientific research regarding biodiversity of the Americas (systematics, biogeography, ecology and evolution), as well as its conservation and management. The journal ensures high standards with a system of external peer review, and is included in the list of excellence of journals of the National Council of Science and Technology (CONACyT, Mexico). It is currently included in ASFA, Biological Abstracts, Biological Sciences, Latindex Periódica, RedALyC, Web of Science (Thomson Reuters), SciELO, SCOPUS, and Zoological Records.