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Stomatal micromorphology in a complex of Mimosa section Mimosa (Fabaceae)
Protoplasma ( IF 2.9 ) Pub Date : 2021-05-05 , DOI: 10.1007/s00709-021-01655-9
Mariana C Grohar 1, 2, 3 , Sonia Rosenfeldt 1 , Matías Morales 2, 3, 4
Affiliation  

The genus Mimosa Linnaeus (Leguminosae) comprises more than 530 species, being one of the most diversified genera in the family. A vast morphologic variability has been described at all infrageneric levels. Considering stomata description, a very low proportion of species have been studied in the genus, and the description was limited to stomata types, but not to variation in the disposition of subsidiary cells. Here we analyze type, length, and distribution of stomatic complexes in 19 taxa of Mimosa subseries Dolentes and subseries Brevipedes, a high variability taxonomic complex, as well as their density on both foliar faces and epidermic pavement cell morphology. We found four different stomatal types, 2 distribution types, and 3 epidermic pavement cell shapes. Some of these features are taxonomically relevant at infraspecific levels, since it adds important information for the separation of the taxa, but also questions supraspecific taxonomic groups of previous proposals of the genus. We also hypothesized about the origin of the variation of some stomata features in relation to ecological and ploidy-level variability in this complex.



中文翻译:

含羞草复合体中的气孔微形态 含羞草(豆科)

含羞草属(豆科)包含 530 多个物种,是该科中最多样化的属之一。已在所有亚属水平上描述了巨大的形态变异性。考虑到气孔描述,该属研究的物种比例非常低,描述仅限于气孔类型,但不包括副细胞分布的变化。在这里,我们分析了含羞草亚系Dolentes和亚系 19 个分类群中气孔复合体的类型、长度和分布,一个高变异性的分类学复合体,以及它们在叶面和表皮路面细胞形态上的密度。我们发现了四种不同的气孔类型、2 种分布类型和 3 种表皮铺面细胞形状。其中一些特征在亚种水平上与分类学相关,因为它为分类群的分离增加了重要信息,但也质疑该属先前提议的超种分类群。我们还假设了一些气孔特征的变异与该复合体中生态和倍性水平变异性相关的起源。

更新日期:2021-05-05
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