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Abscisic acid and abiotic stress tolerance - different tiers of regulation.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Mehrotra, Rajesh Bhalothia, Purva Bansal, Prashali Basantani, Mahesh Kumar Bharti, Vandana Mehrotra, Sandhya
Description	Country affiliation: Japan Author Affiliation: Mehrotra R ( Department of Biological Sciences, Birla Institute of Technology & Sciences, Pilani, Rajasthan 333031, India); Bhalothia P ( Department of Biological Sciences, Birla Institute of Technology & Sciences, Pilani, Rajasthan 333031, India.); Bansal P ( Department of Biological Sciences, Birla Institute of Technology & Sciences, Pilani, Rajasthan 333031, India); Basantani MK ( Division of Endocrinology, University of Pittsburgh, 200 Lothrop Street, BST E1140, Pittsburgh, PA 15261, USA.); Bharti V ( Department of Biotechnology, St. Columba's College, Vinoba Bhave University, Hazaribagh, India.); Mehrotra S ( Department of Biological Sciences, Birla Institute of Technology & Sciences, Pilani, Rajasthan 333031, India. Electronic address: sandhyamehrotrabits@gmail.com.)
Abstract	Abiotic stresses affect plant growth, metabolism and sustainability in a significant way and hinder plant productivity. Plants combat these stresses in myriad ways. The analysis of the mechanisms underlying abiotic stress tolerance has led to the identification of a highly complex, yet tightly regulated signal transduction pathway consisting of phosphatases, kinases, transcription factors and other regulatory elements. It is becoming increasingly clear that also epigenetic processes cooperate in a concerted manner with ABA-mediated gene expression in combating stress conditions. Dynamic stress-induced mechanisms, involving changes in the apoplastic pool of ABA, are transmitted by a chain of phosphatases and kinases, resulting in the expression of stress inducible genes. Processes involving DNA methylation and chromatin modification as well as post transcriptional, post translational and epigenetic control mechanisms, forming multiple tiers of regulation, regulate this gene expression. With recent advances in transgenic technology, it has now become possible to engineer plants expressing stress-inducible genes under the control of an inducible promoter, enhancing their ability to withstand adverse conditions. This review briefly discusses the synthesis of ABA, components of the ABA signal transduction pathway and the plants' responses at the genetic and epigenetic levels. It further focuses on the role of RNAs in regulating stress responses and various approaches to develop stress-tolerant transgenic plants.
File Format	HTM / HTML
ISSN	01761617
Issue Number	7
Volume Number	171
e-ISSN	16181328
Journal	Journal of Plant Physiology
Language	English
Publisher	Elsevier
Publisher Date	2014-04-15
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Botany Abscisic Acid Metabolism Epigenesis, Genetic Gene Expression Regulation, Plant Plant Physiological Phenomena Signal Transduction Stress, Physiological Genetics Plant Proteins Plants, Genetically Modified Rna, Plant Journal Article Research Support, Non-u.s. Gov't Review
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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Abiotic stress tolerance.

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Hormone balance and abiotic stress tolerance in crop plants.

Improved drought and salt tolerance of Arabidopsis thaliana by transgenic expression of a novel DREB gene from Leymus chinensis.

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