TY - JOUR
T1 - Modulation of gene expressions and enzyme activities of methionine sulfoxide reductases by cold, ABA or high salt treatments in Arabidopsis
AU - Oh, Jee Eun
AU - Hong, Suk Whan
AU - Lee, Yunsook
AU - Koh, Eun Ji
AU - Kim, Kideok
AU - Yong, Weon Seo
AU - Chung, Namhyun
AU - Jeong, Moonsoo
AU - Cheol, Seong Jang
AU - Lee, Byoungcheon
AU - Kyoung, Heon Kim
AU - Lee, Hojoung
PY - 2005/12
Y1 - 2005/12
N2 - Abiotic stress-responses in plants, which tend to be induced specifically by cold, drought or salinity, are accompanied by complex phenotypic and physiological phenomena. It has been established that such plant cell responses are induced, in part, by the accumulation of reactive oxygen species, which leads to detrimental effects on biomolecules. For example, methionine residues in proteins are oxidized by ROS, resulting in the formation of methionine-S-sulfoxides (Met-S-SO) and methionine-R-sulfoxides (Met-R-SO), which cause the protein to malfunction. Methionine sulfoxide reductase catalyzes the reduction of methionine sulfoxide to methionine, thereby functioning as an antioxidant repair enzyme. Recent reports regarding plant MSRs have revealed that they play an important role in defending against oxidative stresses. Overall, however, the precise cellular roles of these proteins remain largely unknown, especially with regard to plant responses to abiotic stresses, such as cold or high salt. Therefore, the objective of this study was to identify an MSR gene which responds to adverse conditions such as cold, ABA, or high salt, and assess its suitability as a candidate for genetic manipulation for the purpose of increasing plant stress tolerance. We found that the MSR4 gene is induced profoundly by high salt conditions, but not by cold. This observed molecular regulation of the MSR4 gene induction in abiotic stress conditions suggests that this gene might constitute a good candidate for genetic manipulation to improve stress tolerance in crop plants.
AB - Abiotic stress-responses in plants, which tend to be induced specifically by cold, drought or salinity, are accompanied by complex phenotypic and physiological phenomena. It has been established that such plant cell responses are induced, in part, by the accumulation of reactive oxygen species, which leads to detrimental effects on biomolecules. For example, methionine residues in proteins are oxidized by ROS, resulting in the formation of methionine-S-sulfoxides (Met-S-SO) and methionine-R-sulfoxides (Met-R-SO), which cause the protein to malfunction. Methionine sulfoxide reductase catalyzes the reduction of methionine sulfoxide to methionine, thereby functioning as an antioxidant repair enzyme. Recent reports regarding plant MSRs have revealed that they play an important role in defending against oxidative stresses. Overall, however, the precise cellular roles of these proteins remain largely unknown, especially with regard to plant responses to abiotic stresses, such as cold or high salt. Therefore, the objective of this study was to identify an MSR gene which responds to adverse conditions such as cold, ABA, or high salt, and assess its suitability as a candidate for genetic manipulation for the purpose of increasing plant stress tolerance. We found that the MSR4 gene is induced profoundly by high salt conditions, but not by cold. This observed molecular regulation of the MSR4 gene induction in abiotic stress conditions suggests that this gene might constitute a good candidate for genetic manipulation to improve stress tolerance in crop plants.
KW - Abiotic-stress response
KW - Arabidopsis
KW - Methionine sulfoxide reductase
KW - Reactive oxygen species
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U2 - 10.1016/j.plantsci.2005.05.033
DO - 10.1016/j.plantsci.2005.05.033
M3 - Article
AN - SCOPUS:26444606326
VL - 169
SP - 1030
EP - 1036
JO - Plant Science
JF - Plant Science
SN - 0168-9452
IS - 6
ER -