Differential expression of salt overly sensitive pathway genes determines salinity stress tolerance in Brassica genotypes
Copyright © 2011 Elsevier Masson SAS. All rights reserved.
| Veröffentlicht in: | Plant physiology and biochemistry : PPB. - 1991. - 51(2012) vom: 01. Feb., Seite 90-101 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2012
|
| Zugriff auf das übergeordnete Werk: | Plant physiology and biochemistry : PPB |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't DNA, Complementary Sodium-Hydrogen Exchangers Water 059QF0KO0R Chlorophyll 1406-65-1 Sodium Chloride 451W47IQ8X mehr... |
| Zusammenfassung: | Copyright © 2011 Elsevier Masson SAS. All rights reserved. The objective of the present study was to examine the role of SOS pathway in salinity stress tolerance in Brassica spp. An experiment was conducted in pot culture with 4 Brassica genotypes, i.e., CS 52 and CS 54, Varuna and T 9 subjected to two levels of salinity treatments along with a control, viz., 1.65 (S(0)), 4.50 (S(1)) and 6.76 (S(2)) dS m(-1). Salinity treatment significantly decreased relative water content (RWC), membrane stability index (MSI) and chlorophyll (Chl) content in leaves and potassium (K) content in leaf, stem and root of all the genotypes. The decline in RWC, MSI, Chl and K content was significantly less in CS 52 and CS 54 as compared to Varuna and T 9. In contrast, the sodium (Na) content increased under salinity stress in all the plant parts in all the genotypes, however, the increase was less in CS 52 and CS 54, which also showed higher K/Na ratio, and thus more favourable cellular environment. Gene expression studies revealed the existence of a more efficient salt overly sensitive pathway composed of SOS1, SOS2, SOS3 and vacuolar Na(+)/H(+) antiporter in CS 52 and CS 54 compared to Varuna and T 9. Sequence analyses of partial cDNAs showed the conserved nature of these genes, and their intra and intergenic relatedness. It is thus concluded that existence of an efficient SOS pathway, resulting in higher K/Na ratio, could be one of the major factor determining salinity stress tolerance of Brassica juncea genotypes CS 52 and CS 54 |
|---|---|
| Beschreibung: | Date Completed 16.04.2012 Date Revised 30.09.2020 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2690 |
| DOI: | 10.1016/j.plaphy.2011.10.001 |