Write the physiological effects of gibberellins.

Explanation

(i) Physiological effects of gibberellins
(1) Gibberellins promote the production of male flowers in monoecious plants (Cucurbits).
(2) Gibberellins break dormancy of potato tubers.
(3) Gibberellins are efficient in inducing the formation of seedless fruit (Parthenocarpic fruits).
(4) Gibberellins stimulate extraordinary elongation of internode Eg. Corn and pea.
(ii) An enzyme, Hyaluronidase present in the acrosome help the sperm to enter the ovum during fertilization.
(iii) Deforestation is the destruction of large area of forests. It gives rise to ecological problems like floods, drought, soil erosion, loss of wild life, extinction of species, imbalance of biogeochemical cycles, alteration of climatic conditions and deserification. Therefore it is a threat to the economy quality of life and future of the environment.