Effect of salinity on callus induction, growth and proline accumulation in calli of rice genotypes

In vitro studies were conducted to study callus induction, relative callus growth and level of proline accumulation in calli obtained from mature embryos of rice seeds at various salinity levels. Higher salt concentrations delayed callus induction, reduced the relative callus growth and significantly increased proline accumulation in all the genotypes. The study indicated a positive relationship between proline accumulation and salt tolerance of rice genotypes.