Journal of Agricultural Sciences,
 Vol. 6 (2),
079-086, February

ISSN: 2276-7770  

Review Paper

Manuscript Number: 012816024




Abiotic Stress, Antioxidants and Crop
Productivity: The Mitigating Role of Exogenous Substances


Agada, Odu Odo


Department of Crop Science,
Faculty of Agriculture, Unversity Putra, Malaysia,43400, Serdang, Selangor.



A major result of abiotic stress is the excessive production of
Reactive Oxygen Species (ROS) which are capable of damaging all types of
cellular structures. Whereas well – ordered redox homeostasis act under normal
conditions to keep them from accumulating to damaging levels, they are
overwhelmed under sub optimal conditions. This review considers the role of
plants antioxidant defense system in managing oxidative stress and shows
clearly that when confronted with stressful conditions such as drought and salinity
the plants antioxidant defense machinery becomes inadequate and must be
supported to be able to rise up to the stress challenge. The paper discussed
the exogenous application of a variety of substances as a veritable source of
such assistance, showing how their supply ameliorate stress effect and enhance
crop productivity.   


Key words: Oxidative stress,
antioxidants, Compatible osmolites, hormones, exogenous application.

Post-review Rundown

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