Morphological, anatomical, palynological and antioxidant properties of verbascum Bombyciferum boiss. (Scrophulariaceae)

In this study, morphological, anatomical, palynological, antioxidant activity and antioxidant capacity of endemic Verbascum bombyciferum Boiss., spread in Bursa, is analyzed. Verbascum bombyciferum Boiss. is a biennial, upright and round stemmed species having dense simple and non-secreting hairs, with ovate or obovate main leaves, bracts varying from ovate to triangular ovate, having 2-brakteolled and yellow flowered. Single layered epiderma, 2-3 layered collenchyma, cortex parenchyma, endoderm, various sized and spread sclerenchyma cells, cambium, phloem, xylem and pith are seen lined from the outer parts to inwards. Stomata are at the same level with epidermis on the leaves. It has simple and non-secreting hairs at both sides of the leaves. The pollen grains type is tricolpate, pollen shape is prolate spheroid and its ornamentation is reticulate. It is determined that seed shape is prismatic-oblong and seed surface pattern is alveolate. As a result of the study on the antioxidant activity and antioxidant capacity, the value for IC50 of methanolic extract was determined as 95,15 ± 5,14 µg/ml for DPPH free radical scavenging activity and 273,56 ± 5,75 µg/ml for ABTS radical scavenging activity. Besides, the species was observed to have a high reducing power. It was determined that the total phenolic substance is 91,30 ± 1,16 mgGA/g and the total antioxidant substance is 1270,80 ± 15 μgTrolox/g.