ANATOMICAL ASPECTS OF THE STEM AND LEAF OF SENECIO GRANDIDENTATUS LEDEB. (ASTERACEAE)

Loreley Dana Jianu, Rodica Bercu, Razvan Dan Popoviciu

Abstract


The paper presents anatomical aspects of the stem and leaf of an endengered plant, growing on sandy coastal beaches and loessoid sea-cliffs Senecio grandidentatus Ledeb. It was observed that the root has a secondary structure, due to the phelogen and cambium activity, The stem has a one-layered epidermis, covered by cuticle, a differentiated cortex and a large number of collateral vascular bundles, most of them with xylem secondary structure due to the cambium activity. The leaf has a homogenous mesophyll and is amphistomatic. Long and densly non glandular hairs are present in the stem and leaf. The mechanical tissue is represented by sclerenchymatous fibers and tangential collenchyma in the in the stem and collenchyma tissue in the leaf.


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