NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Biotechnology (IJBT) >
IJBT Vol.02 [2003] >
IJBT Vol.02(1) [January 2003] >


Title: Molecular Strategies for Developing Salt Tolerant Crops
Authors: Jain, Rajinder Kumar
Saini, Navinder
Jain, Sunita
Singh, Randhir
Keywords: Salt-tolerance
Stress genomics
Genetic engineering
Transformation
Molecular markers
Marker-assisted selection
Issue Date: Jan-2003
Publisher: NISCAIR-CSIR, India
Abstract: Salinity is one of the most important abiotic stresses for agricultural crops. High concentrations of salts cause hyperosmotic and ionic stresses, which, in turn, may generate secondary stresses such as oxidative stress, etc. The complexity and polygenic nature of salt tolerance trait has seriously limited the efforts to develop salt-tolerant crop varieties. This paper reviews new molecular strategies that have been or can be used for the molecular dissection of plant responses to salt stress, discovery of novel structural and regulatory genes involved in stress adaptation, and transgenic and molecular marker strategies used for engineering salt tolerance in plants. Application of novel techniques such as genome sequencing, high-throughput analysis of genomic-scale expressed sequence tags (ESTs), DNA chips/cDNA microarray analyses, targeted or random mutagenesis, knockouts, molecular mapping and gain-of-function or mutant complementation, is expected to accelerate the discovery of the new genes involved in stress adaptation as well as improve understanding of stress biology. A number of stress-related genes have been characterized including the ones that encode for important enzymes or a biochemical pathway, participate in signaling pathways or act as transcriptional regulators for coordinated regulation of stress related genes. Some of these genes have been successfully transferred in model plant species including Arabidopsis, rice and tobacco, and a marginal to significant improvement in salt-tolerance has been reported. In addition, molecular markers can be used for linkage mapping of genes/QTLs for salinity tolerance trait, marker-assisted transfer and pyramiding of such QTLs into agronomically desirable genotypes and/or for map-based cloning of genes. Application of transgenic and molecular marker research coupled with rapid gene discovery via functional genomic research in plants shall provide effective means for designing salt-tolerant crops.
Page(s): 121-137
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Source:IJBT Vol.02(1) [January 2003]

Files in This Item:

File Description SizeFormat
IJBT 2(1) 121-137.pdf3.72 MBAdobe PDFView/Open
 Current Page Visits: 489 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 555809 since 06-Feb-2009  Last updated on 15-Jul-2014Webmaster: nopr@niscair.res.in