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Published on: May 21, 2019
Microarray-based screening of jasmonate-responsive genes in Arabidopsis thaliana
Choonkyun Jung1, Seoung Hyun Lyou, SongYion Yeu
1School of Agricultural Biotechnology and Center for Agricultural Biomaterials, Seoul National University, Seoul 151-921, Korea.
Plant Cell Reports
|February 14, 2007
Summary
Plant hormones called jasmonates regulate gene expression. Methyl jasmonate treatment altered 137 Arabidopsis genes, impacting defense and photosynthesis, and revealed an antagonism with abscisic acid signaling.
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- Jasmonates are crucial plant hormones regulating development and defense.
- Understanding jasmonate-responsive genes is key to plant stress adaptation.
Purpose of the Study:
- To identify and characterize jasmonate-responsive genes in Arabidopsis using microarray analysis.
- To elucidate the interaction between jasmonate and abscisic acid signaling pathways.
Main Methods:
- Microarray analysis of approximately 8,300 Arabidopsis genes.
- Treatment with methyl jasmonate (100 microM) on rosette leaves.
- Northern blot analysis for validation of gene expression patterns.
Main Results:
- 137 Arabidopsis genes showed significant expression changes (over twofold) after methyl jasmonate treatment.
- Upregulated genes included those in jasmonate biosynthesis, defense, oxidative stress, senescence, and cell wall modification.
- Downregulated genes were involved in chlorophyll synthesis and photosynthesis, and abscisic acid-responsive stress genes were reduced.
Conclusions:
- Jasmonate signaling influences a broad spectrum of plant processes, including defense and stress responses.
- An antagonistic interaction exists between jasmonate and abscisic acid signaling in response to abiotic stress.
- Jasmonate-responsive genes exhibit distinct temporal expression patterns, suggesting a hierarchical regulatory cascade.
