Journal
PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
Volume 23, Issue 4, Pages 731-744Publisher
SPRINGER
DOI: 10.1007/s12298-017-0462-7
Keywords
ROS; Antioxidants; Osmolytes; Polyphenols; Potassium; Stress amelioration
Categories
Funding
- Jiwaji University, Gwalior
- MPCST, Bhopal
- Jiwaji University [F/DEV/2013-14/33]
- MPCST, Bhopal [1466/CST/RD(BS)/2015]
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Plants are confronted with a variety of environmenmtal stresses resulting in enhanced production of ROS. Plants require a threshold level of ROS for vital functions and any change in their concentration alters the entire physiology of plant. Delicate balance of ROS is maintained by an efficient functioning of intriguing indigenous defence system called antioxidant system comprising enzymatic and non enzymatic components. Down regulation of antioxidant system leads to ROS induced oxidative stress causing damage to important cellular structures and hence anomalies in metabolism. Proper mineral nutrition, in addition to other agricultural practices, forms an important part for growth and hence the yield. Potassium (K) is a key macro-element regulating growth and development through alterations in physiological and biochemical attributes. K has been reported to result into accumulation of osmolytes and augmentation of antioxidant components in the plants exposed to water and salt stress. In the present review an effort has been made to revisit the old findings and the current advances in research regarding the role of optimal, suboptimal and deficient K soil status on growth under normal and stressful conditions. Effect of K deficiency and sufficiency is discussed and the information about the K mediated antioxidant regulation and plant response is highlighted.
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