1 23 Indian Journal of Plant Physiology An International Journal of Plant Physiology ISSN 0019-5502 Volume 21 Number 4 Ind J Plant Physiol. (2016) 21:545-555 DOI 10.1007/s40502-016-0264-x Physiological characterization of gamma- ray induced mutant population of rice to facilitate biomass and yield improvement under salinity stress Rohit Joshi, Rama Prashat, Prabodh C. Sharma, Sneh L. Singla-Pareek & Ashwani Pareek