Effect of growth regulators on photosynthetic metabolites in cotton under water stress
2002
Pandey, D.M. | Kumar, B. | Jain, S. (Haryana Agricultural Univ., Hisar (India). Depertment of Botany and Plant Physiology) | Goswami, C.L.
The contents of several photosynthetic metabolites - 3-phosphoglyceric acid (3-PGA), pyruvate, nicotinamide adenine dinucleotide phosphate (NADP) and adenosine triphosphate (ATP) - were determined in leaves of cotton plants (Gossypium hirsutum cv. H-777) subjected to waterlogging at vegetative stage, and/or drought at the reproductive stage. In controls, soil moisture contents was kept at field capacity. One day prior to stress, the plant shoots were sprayed with 5 microM aqueous solution of indole-3-acetic acid (IAA), gibberellic acid (GA3), benzylaminopurine (BAP), abscisic acid, and ethrel. In control plants, various growth regulators reduced contents of 3-PGA and ATP while increased contents of NADP and pyruvate. During waterlogging IAA promoted 3-PGA content, and BAP enhanced pyruvate content. During drouaht, GA; enhanced ATP and 3-PGA contents, while IAA enhanced pyruvate content.
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