Daya Publishing House® A Division of Astral International Pvt. Ltd. New Delhi – 110 002
Abstract
Not AvailablePlants are exposed to various environmental stresses throughout their life cycle. Plants possess
physical barriers, such as the cuticle, the cell wall and a number of biological and molecular mechanisms
to counteract the effect of these stresses, which also includes the synthesis of ROS, namely the oxidative
burst. ROS can react with proteins, DNA, and membrane lipids to reduce photosynthesis, increase
electrolyte leakage, and accelerate senescence and cell death. These are under strict control through an
antioxidative system comprising various enzymes and low molecular weight components. ROS are
not only toxic by-products of aerobic metabolism, but are also signalling molecules involved in several
developmental processes. Here, the divergent sources of ROS and antioxidative system that is present
in plant cells are discussed and also reviewed the role of ROS in the cell signalling.Not Availabl
