Paper Details

Influence of drought stress on photosynthetic, radical oxygen, respiration, assimilate partitioning, activities of enzymes, phytohormones and essential oils in crop plants

Mohadese Servani, Hamid Reza Mobasser, Hamid Reza Ganjali

DOI: https://dx.doi.org/10.12692/ijb/5.8.223-236

Int. J. Biosci. 5(8), 223-236. October, 2014. (PDF)

Abstract:

Water-deficit stresses occur in about 70% of arable land around the world and have been shown to have an effect on every aspect of plant growth. Drought is one of the most common environmental stresses that may limit agriculture production worldwide. Many crops have high water requirement and in most countries supplemental irrigation is necessary for successful crop production. Photosynthetic response to drought is a highly complex in plants. Water deficit inhibits photosynthesis by causing stomatal closure and metabolic damage. Stomata of the leaves that are slightly deficient in water opened more slowly in light and close more quickly in the dark. The activities of many enzymes are affected by drought conditions. For example, nitrate reductase activity has been shown to be highly sensitive to water stress, and a significant decrease in nitrate reductase activity was observed in many plant species under drought conditions.  Drought stress also increases the levels of radical oxygen species (ROS) in plant cells, resulting in lipid peroxidation and protein damage.