PPS 501 Environmental Stress Physiology

Environmental stresses; definitions, sources, types, interactions and effects on plant growth stages (seed germination, vegetative stage, flowering and reproductive stages). Effect of stresses on plant physiological process (water and minerals absorption, photosynthesis, respiration, translocation and partitioning, nitrogen metabolism, nitrogen fixation and hormonal balance). Plant response to stresses (adaptation, hardening, resistance and physiological mechanisms). Factors affecting plant resistance to environmental stress. Plant growth improvement under environmental stress conditions.