Abstract
Brassinosteroids are now considered as the sixth group of hormones in plants. As brassinosteroids influence varied growth and development processes such as growth, germination of seeds, rhizogenesis, flowering, senescence and abscission, they are considered as plant hormones with pleiotropic effects. The effect of 28-homobrassinolide and 24-epibrassinolide on ripening of tomato pericarp discs was studied. Application of brassinosteroids to pericarp discs resulted in elevated levels of lycopene and lowered chlorophyll levels. In addition brassinosteroid-treated pericarp discs exhibited decreased ascorbic acid and increased carbohydrate contents. Fruit ripening as induced by brassinosteroids was associated with increase in ethylene production. The study revealed the ability of brassinosteroids in accelerating fruit-senescence.
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