PJB-2010-80
COMPARATIVE STUDY ON THE EFFECTS OF VARIOUS PLANT GROWTH REGULATORS ON GROWTH, QUALITY AND PHYSIOLOGY OF CAPSICUM ANNUUM L.
GEORGIA OUZOUNIDOU1*, ILIAS ILIAS2, ANASTASIA GIANNAKOULA2 AND PARTHENA PAPADOPOULOU1
Abstract
Pre- and post-harvest physiology and quality responses of green pepper (Capsicum annuum L. cv ‘Standar p.13/0211003-01-Agris’) on exogenous Gibberellic acid-GA3 (100 μM), Prohexadione-Calcium (100 mg l-1), Cycocel (100 mg l-1) and Ethephon (100 mg l-1) applied as foliar sprays, were investigated. Among PGRs, GA3 @ 100μM was effective in promoting flowering and better for vegetative characteristics. Chlorophyll a+b concentration of leaves was markedly inhibited by GA3, Prohexadione-Calcium, Cycocel and Ethephon application while, the maximum quantum yield of primary photochemistry (Fv/Fm) and the ratio Fv/Fo was slightly increased under GA3. The above indices were significantly depressed under Cycocel, Ethephon and Prohexadione-Calcium. CO2 production pattern was negatively related with chlorophyll fluorescence (Fv/Fo) yield and ascorbic acid content. The Brix content and the “maturity index” were depressed after Prohexadione-Calcium, Cycocel and Ethephon application. In general, the best green pepper appearance was found under control and GA3 whereas, pre- and post-harvest physiology and quality characteristics dropped sharply and green peppers were not marketable under the three growth retardants.
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