PJB-2023-589
PALYNO-MPRPHOLOGICAL STUDIES OF THE GENUS VERONICA L. FROM WESTERN HIMALAYAS, PAKISTAN
SHAMILA FIRDOUS
Abstract
Abstract
This scientific study was designed in order to investigate, palynologically the genus Veronica L. from Western Himalayas, Pakistan. Various pollen morphology related aspects viz., pollen shape, size, apertures, exine thickness and ornamentation were focused. Pollen grains, belonging to 14 species of Veronica were studied on quantitative as well as qualitative basis, under light microscope (LM) and Scanning Electron Microscope (SEM). Palynology of four species (i.e., V. biloba, V. pusilla, V. undulata and V. stewartii) was investigated for the first time. Pollen grains of the genus were mostly (12 species) medium, rarely (2) small, prolate-spheroidal (5), spheroidal (4), subprolate (2), prolate (1), oblate-spheroidal (1) and oblate (1), generally free, radially symmetrical, isopolar and tricolpate. Tectum generally Striate (6), other tectum types viz., Rugulate-punctate (4), Rugulate (1), Microreticulate-punctate (2) and Striate-punctate (1). Based on exine sculpturing all species are divided into three groups, i-e., Striate sculpturing, Rugulate sculpturing and Micro-reticulate sculpturing. Exine sculpturing proved to be a distinguishing feature particularly at species level.
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