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Mention elaborately the functions of Auxins. |
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Answer» Functions of Auxins: (i) Cell enlargement: Auxins promote elongation and growth of stems and roots enlargement of many fruits by stimulating cell enlargement. The auxins cause cell enlargement by solubilization of carbohydrates, loosening of microfibrils synthesis of more wall materials, increased membrane permeability and respiration. (ii) Cell division in cambium: Auxin is responsible for initiation and promotion of cell division in cambium. The reactivation of cambium in the growing season is apparently triggered by IAA moving from the developing shoot buds. (iii) Cell division and tissue culture: In tissue culture auxins initiate and promote cell division, and result in the formation of callus. (iv) Root growth and root initiation: Auxins promote root growth only at extremely low concentration. At higher concentration, auxin is suitable for shoot elongation. |
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