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Indian Journal of Biotechnology (IJBT) >
IJBT Vol.09 [2010] >
IJBT Vol.09(3) [July 2010] >
| Title: | Recent advances in molecular breeding of drought tolerance in rice (Oryza sativa L.) |
| Authors: | Soren, Khela Ram
Ali, Kishwar
Tyagi, Vandana
Tyagi, Aruna |
| Keywords: | Drought stress
osmoprotectent
rice
transcription factor |
| Issue Date: | Jul-2010 |
| Publisher: | CSIR |
| Abstract: | Rice is an ideal plant species for genomic
studies for its relative small genome size (~430 Mb), diploid origin (2x=24)
and close relationship with other important crops. Rice has been grown under
diverse ecological conditions and gets exposed to different environmental
stresses like drought, salinity, cold, etc. Drought is generally avoided in
irrigated rice production system but it is more prone to 63.5 mha of rainfed
rice grown annually in different parts of world. Severe osmotic stress causes
detrimental changes in cellular components. Yet in response to various
environmental stresses, plants have developed different physiological and
biochemical strategies to adapt stress conditions, such as, stress associated
changes in metabolites and amino acids (proline), amines (glycin-betaine and
polyamines), and variety of sugar and sugar alcohols (manitol and trehalose).
There is also activation of cascade of molecular networks involved in stress
perception, signal transduction and the expression of specific stress related
genes. To understand these genetically complex mechanisms of abiotic stress
tolerance, an integrated approach of molecular breeding, classical physiology
and conventional breeding is necessary, and the present review is an effort to
deal these issues. |
| Page(s): | 233-251 |
| ISSN: | 0975-0967 (Online); 0972-5849 (Print) |
| Source: | IJBT Vol.09(3) [July 2010]
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