Plant Growth Substances as Osmoregulants Under Salt Stress in Callus Cultures of Cowpea

Ameliorating effects of kinetin and indole-3-acetic acid on cowpea callus growth under salt stress were studied Salts supressed the callus growth and caused cellular dehydration, reduction in soluble amino acids and sugars and increase in the proline level. Kinetin (3.0 mg/1) and IAA (3.0 mg/1) supressed the salt induced injuries by lowering the osmotic potential and maintaining the cellular turgidity. Proline, soluble amino acids, sugars, insoluble sugars and proteins were increased by the growth substances, which helped in maintaining the growth processes under salt stress.