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S.E.M.STUDIES OF TRICHOMES TYPES IN REPRESENTATIVE SPECIES OF THE SECT. POLYACTIUM AND SECT. LIGULARlA IN THE GENUS PELARGONIUM L. HER., (GERANIACEAE)

SYEDA SALEHA TAHIR**, MARIA LIZ-BALCHIN*, S.Z. HUSAIN AND M.T.M. RAJPUT

Abstract: Trichomes from the leaves of 11 species of Pelargonium L' Herit., were examined with the S.E.M. Trichomes observed were of either non-glandular unicellular and uniseriate-type or were glandular, uniserrate stalk of different length, with a unicellular head consisting of spherical or oblong spherical terminal cell. The surface of the trichomes were smooth to granulate-tuberculate. The study revealed that trichomes of the leaf indumentum can be used as an additional aid in the identification and determination of relationship between the species.

School of Plant Sciences, Plant Science Laboratories, University of Reading, Whiteknights, Reading RG6 2AS, U.K.

South Bank University, Department of Biotechnology, Borough Road, London, SEI, OAA, England.
Corresponding Author: Department of Botany, University of Sindh, Jamshoro, Sindh, Pakistan.