i “Exploring Physiological Mechanism of Salt Tolerance in Wheat Germplasm” By Muhammad Sohail Saddiq M.Sc. (Hons.) Agronomy 2006-ag-1540 A thesis submitted in partial fulfillment of the requirement for the degree of Doctor of Philosophy in Crop Physiology DEPARTMENT OF AGRONOMY, FACULTY OF AGRICULTURE, UNIVERSITY OF AGRICULTURE, FAISALABAD (PAKISTAN) 2017