PJB-2023-470
Anatomical characterization of vegetative organs of endangered halophyte Odontarrhaena borzaeana (Nyár.) D.A. German
Loreley Dana Jianu and Dan Răzvan Popoviciu
Abstract
Odontarrhena borzaeana (Nyár.) D. A. German (= Alyssum borzaeanum Nyár.) is an endemic and endangered halophyte of the family Brassicaceae species grows on the sandy shores of the Black Sea. The aim of this research was to assess some anatomical features of vegetative organs of this species.
Roots had a secondary structure with less developed suber and secondary cortex and bundle-like arrangement of the primary xylem towards the centre of the root (alternating with pith tissue). Stem had a primary structure, with differentiated cortex (the innermost 2-3 cell layers having a flattened shape). Flattened blocks of phloem were followed by xylem. Well-developed sclerenchyma layers were found both within and between vascular bundles, forming a continuous ring around the stem. Pith was parenchymatous and abundant.
Leaf blades were amphistomatic and equifacial, with few layers of spongy parenchyma in the middle and well-developed palisade parenchyma towards both sides. Typical collateral bundles were each surrounded by a sheath of parenchymatous cells. Both stem and leaves were covered with massive stellate trichomes (larger on leaves), similarly to the ones reported in several related species.
To Cite this article:
Jianu, L.D. and D.R. Popoviciu. 2025. Anatomical characterization of vegetative organs of endangered halophyte Odontarrhaena borzaeana (Nyár.) D.A. German. Pak. J. Bot., 57(3): DOI: http://dx.doi.org/10.30848/PJB2025-3(27)
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