Comparative Root and Stem Anatomy of Four Rare <i>Onobrychis</i> Mill. (Fabaceae) Taxa Endemic in Turkey

Abstract

Four endemic taxa of Onobrychis Mill. genus, some of them being classified in the endangered threat category, were investigated for root and stem anatomy. Onobrychis quadrijuga, O. argyrea subsp. argyrea, O. tournefortii and O. albiflora were studied in regard to specific anatomy for the first time within the hereby study. Anatomical characters as the size and shape of the periderm, cortex, cambium cells in root and epidermis, collenchyma, cortex, cambium and pith cells in stem belonging to these four Onobrychis taxa were determined in detail. Based on the roots and stems measurements and analysis, specific anatomical differences between species were revealed.

Stem base and root anatomy of four young trees of Legume species from Cerrado

“…A large number of bers was observed in the secondary phloem and xylem, especially in the innermost region, in all species analyzed, except in the secondary phloem at the stem base of S. polyphylla, which was visibly the region that presented fewer bers. The presence of sclerenchymatic brous cells, whether individual or in groups, is common in the cortex, secondary phloem, and secondary xylem in Fabaceae (Tekin and Yilmaz 2015). Silva et al 2013 found, in the stem of Erythrina velutina, groups of bers forming a band over the phloem, as seen in some of the four studied species The presence of lenticels was veri ed in A. niopoides and S. polyphylla at 18 months.…”

Jipsli Habitatlarda Doğal Olarak Yetişen Onobrychis germanicopolitana Hub.-Mor. & Simon (Fabaceae)’nın Ultrayapısal Bulguları ve Uyarlanabilir Yanıtları

“…The vascular cambium was clearly distinguish with as a region of 2-5 layers situated between the pith and cortex. Tekin and Yılmaz (2015) noted that in the cross section of the stems of four rare Onobrychis, the epidermis cell shapes were square, rectangular or rectangular oval, and that the cortex in these species was surrounded by parenhyma cells. Roots were ~1.3 mm in diameter with a uniform periderm (~11 µm) all around the root (Figure 8a,b).…”

“…The protoxylem vessels were smaller than of the metaxylem vessels (Figure 8c). Tekin and Yılmaz (2015) documented that the stems and roots of Onobrychis sp. display a a similar composition.…”