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Author Vu H.T.T., Manangkil O.E., Mori N., Yoshida S., Nakamura C.
Title Induction and repression of gene expression mediating ethylene biosynthesis and sodium/proton exchange in rice seedlings under submergence stress
Abstract:
Elongation escape mediated by seedling vigor with fast shoot elongation under submergence is considered to be an important strategy for rice particularly in direct seeding cultivation systems. We compared the expression profiles of two key genes in rice for ethylene biosynthesis - 1-aminocyclopropane-1-carboxylate synthase (OsACS) and oxidase (OsACO) genes, and five Na+/H+ exchanger (OsNHX) paralogs under normal and submerged conditions. The amount of transcripts was studied by RT-PCR using seedlings of one japonica and three indica cultivars with different levels of seedling vigor under submergence. In both types, submergence induced marked accumulation of transcripts of all paralogs of OsACS and OsACO except for OsACS1, which showed complete repression under the stress in non-vigorous indica cultivars suggesting its key role in seedling vigor under submergence. OsNHX expression was also enhanced under submergence, and the levels of OsNHX1 and OsNHX5 transcripts agreed well with those of seedling vigor under submergence. The observed mode of OsACS, OsACO and OsNHX expression under submergence suggests that these genes can be potential targets for understanding the mechanism regulating seedling vigor under submergence at the post-germination stage in rice.
Journal Biotechnology and Biotechnological Equipment
Country Japan
Volume 26
Pages 2945-2951
Year 2012
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PubMed Central ID -
DOI -
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Relation
Gene ACO1 ACO2 ACO3 ACO4 ACO5 ACO7 ACS1 ACS2 ACS3 ACS4 ACS5 NHX1 NHX4 NHX5
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
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Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
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