Ensuring food security for the increasing population is one of the challenges for next decades. As frontiers of crop production, plant physiologists are the most responsible for the improvement of crop production steadily. However, there are several challenges which hindering crop production which includes various abiotic and biotic stresses as loss of soil productivity and natural biodiversity. With the present global climatic change, these abiotic stress factors are taking place more frequently than earlier times leading to the vulnerability of crop productivity, and creating challenges for the farming community to feed the ever-growing population of this universe. Exploring the physiological bases of plant stress tolerance is very important in developing plant stress tolerance. To address this issue researchers are working in understanding the physiological and molecular mechanisms of abiotic stress responses and tolerance. A remarkable progress has also been made in developing crop varieties tolerant to environmental stress. This special issue is indented to bring together a galaxy of eminent experienced scientists to present latest developments in this field.

Potential topics may include, but are not limited to:

· Plant growth regulation

· Plant water relations

· Solute transport in plants

· Ion homeostasis

· Water and nutrient use efficiencies in plants

· Photosynthesis research

· Plant physiological responses to abiotic and biotic stress

· Molecular plant physiology

· Use of exogenous protectants in improving plant physiology