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Achene micromorphology and its taxonomic significance in some species in Taraxacum sect. Palustria (Asteraceae)
PhytoKeys ( IF 1.3 ) Pub Date : 2020-10-29 , DOI: 10.3897/phytokeys.166.54271
Agnieszka Rewicz , Jolanta Marciniuk , Paweł Marciniuk

The genus Taraxacum is one of the largest and taxonomically most complicated apomictic genera. Currently, it is considered to consist of over 2800 species placed within 60 sections. Due to the large number of species, and their uniform morphological design and plasticity of leaves, the identification of plants at the species level is challenging even for specialists. This problem significantly hinders the study of their properties and the rational use of these valuable medicinal and nutritional plants. This paper presents the results of research on the morphology and micromorphology of achenes of 28 Taraxacum species of sect. Palustria and for comparison one species per section of: Erythrosperma, Naevosa, Piesis, and Taraxacum. The achenes were measured with a stereoscopic microscope and a biometric program, and micromorphological studies were performed by scanning electron microscopy. It has been shown that traits associated with achene morphology and micromorphology have a high diagnostic value, allowing us to distinguish sections as well as species within the sect. Palustria. Based on the examined achene features, a dichotomous key for determining the studied species was constructed.

中文翻译:

蒲公英属某些物种的瘦果形态学及其分类学意义。ust(菊科)

蒲公英属是最大且分类学上最复杂的无融合生殖属之一。目前,它被认为是放置在60个区域中的2800多个物种。由于种类繁多,并且它们具有统一的形态设计和叶片可塑性,因此即使对于专家而言,在种类级别上识别植物也具有挑战性。这个问题严重阻碍了对它们的特性的研究以及这些有价值的药用和营养植物的合理使用。本文介绍了28种蒲公英属的瘦果形态和微观形态的研究结果。为比较,每片有一种物种:红皮草,内华达州,彼得西斯和蒲公英。用体视显微镜和生物识别程序测量瘦果,通过扫描电子显微镜进行微观形态学研究。已经表明,与瘦果形态和微形态有关的性状具有很高的诊断价值,使我们能够区分该科中的切片和物种。Palustria。基于所检查的瘦果特征,构建了用于确定所研究物种的二分法键。
更新日期:2020-10-30
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