PJB-2012-243
COMPARISON OF CYTOGENETIC ANTAGONISM BETWEEN ABSCISIC ACID AND PLANT GROWTH REGULATORS
SELMA TABUR AND SİĞNEM ÖNEY
Abstract
In the present work, antagonistic effect of abscisic acid (ABA) and various plant growth regulators on cytogenetic activity in root meristem cells of barley (Hordeum vulgare L. cv. Bülbül 89) was compared. The seeds germinated in medium with ABA alone (25µM, micromolar), mitotic phases and mitotic aberrations were mounted on an Olympus CX41 microscope and photographed (100X) with a digital camera (Olympus C-5060). The results showed that mitotic index (MI) significantly decreased while chromosomal aberrations increased by approximately 70% as compared to control. However, all of the plant growth regulators (PGRs) studied [gibberellic acid- GA3, Kinetin- KIN, benzyladenine- BA, ethylene- E
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