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Comparison of petiole anatomy in Flemingia and its potential for delimitation of species
Flora ( IF 1.9 ) Pub Date : 2021-02-17 , DOI: 10.1016/j.flora.2021.151790
Khyati D. Thacker , Sandip K. Gavade , Manoj M. Lekhak , Amit D. Gondaliya , Kishore S. Rajput

Socio-economically, different species of Flemingia are used worldwide for various purposes like food, folk medicine to cure various ailments, as a source of non-timber products (e.g., resin, dye, host for lac insect, toothbrush, etc.). Therefore, species level identification is important even in the absence of reproductive structures as it will help to avoid adulteration. In this context, petiole anatomy may be effectively employed since it is considered to be one of the diagnostic characters for the discrimination of taxa at species level. Thus, in the present study, petiole anatomy of 16 species of Flemingia is investigated to find additional diagnostic features for species level identification. Amongst these 16 species, 13 had trifoliolate leaves whereas three, F. strobilifera, F. chappar and F. paniculata possessed unifoliolate leaves. The petiole was winged except for F. chappar and F. vestita. The wings were much larger in F. nana, F. paraecox and F. sootepensis while in F. paniculata, F. strobilifera and F. wightiana they were just a small outgrowth/projection. The number of vascular bundles in wings varied from 1 to 5. The cortex was composed of palisade and spongy cells which were restricted to the wing region of F. praecox and F. sootepensis. Cortical fibres formed a cap like structure external to the vascular bundle in F. angustifolia, F. nana, F. procumbens, F. sootepensis, F. strobilifera and F. vestita whereas a complete ring was formed in the remaining species. Besides these features, outline of the stem and presence or absence of wing on the dorsal side of the petiole is another important character of taxonomic value. Histological structure and the composition of the petiole of all the species is described in detail and discussed in relation to its diagnostic significance.



中文翻译:

Flemingia中叶柄解剖的比较及其对物种划界的潜力

从社会经济的角度来看,世界范围内不同种类的弗雷明菌被用作各种目的,例如食物,民间药物,以治疗各种疾病,作为非木材产品的来源(例如,树脂,染料,紫胶虫的宿主,牙刷等)。因此,即使没有生殖结构,物种水平的鉴定也很重要,因为它将有助于避免掺假。在这种情况下,叶柄解剖可以被有效地利用,因为它被认为是在物种水平上鉴别分类群的诊断特征之一。因此,在本研究中,对16种Flemingia的叶柄解剖进行了调查,以发现用于物种水平鉴定的其他诊断特征。在这16个物种中,有13个具有三叶形叶子,而三个,F. strobilifera,F。chapparF. paniculata具有单叶的叶子。叶柄被翅除了F. chapparF. vestita。在F. nana,F。paraecoxF. sootepensis中翅膀要大得多,而在F. paniculata,F。strobiliferaF. wightiana中,它们只是很小的突起/突起。翅膀中的维管束数量从1到5不等。皮层由栅栏和海绵状细胞组成,它们局限于F.praecoxF.sootepensis的翅膀区域。皮质纤维在血管束外部形成了帽状结构F. angustifolia,F。nana,F。procumbens,F。sootepensis,F。strobiliferaF.vesita,而完整的环在其余物种中形成。除这些特征外,叶柄背面的茎干轮廓和有无翼是分类学价值的另一个重要特征。详细描述了所有物种的组织结构和叶柄的组成,并对其诊断意义进行了讨论。

更新日期:2021-03-03
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