Arabidopsis CPR5 independently regulates seed germination and postgermination arrest of development through LOX pathway and ABA signaling

The phytohormone abscisic acid (ABA) and the lipoxygenases (LOXs) pathway play important roles in seed germination and seedling growth and development. Here, we reported on the functional characterization of Arabidopsis CPR5 in the ABA signaling and LOX pathways. The cpr5 mutant was hypersensitive t...

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Bibliographic Details
Published in:PloS one 2011-04, Vol.6 (4), p.e19406-e19406
Main Authors: Gao, Guilan, Zhang, Shengchun, Wang, Chengfeng, Yang, Xiang, Wang, Yaqin, Su, Xiaojun, Du, Jinju, Yang, Chengwei
Format: Article
Language:English
Subjects:
Abscisic acid
Abscisic Acid - metabolism
Analysis
Arabidopsis
Arabidopsis - embryology
Arabidopsis - genetics
Arabidopsis - physiology
Arabidopsis Proteins - physiology
Arabidopsis thaliana
Barley
Biology
Biosynthesis
Biotechnology
Catalysis
Drought
Drought resistance
Fatty acids
Gene expression
Gene Expression Regulation, Plant
Genetic analysis
Genetic aspects
Genetic engineering
Genetically modified plants
Germination
Granulocytes
Greening
Life sciences
Lipids
Lipoxygenases - metabolism
Liquid oxygen
Membrane Proteins - physiology
Metabolites
Microorganisms
Microscopy, Confocal
Oryza
Pathways
Phosphatase
Physiology
Plant growth
Plant hormones
Polymerase Chain Reaction
Proteins
Seed germination
Seedlings
Seeds
Seeds - physiology
Senescence
Signal Transduction
Signaling
Sustainable living
Transgenic plants
Trends
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Summary:The phytohormone abscisic acid (ABA) and the lipoxygenases (LOXs) pathway play important roles in seed germination and seedling growth and development. Here, we reported on the functional characterization of Arabidopsis CPR5 in the ABA signaling and LOX pathways. The cpr5 mutant was hypersensitive to ABA in the seed germination, cotyledon greening and root growth, whereas transgenic plants overexpressing CPR5 were insensitive. Genetic analysis demonstrated that CPR5 gene may be located downstream of the ABI1 in the ABA signaling pathway. However, the cpr5 mutant showed an ABA independent drought-resistant phenotype. It was also found that the cpr5 mutant was hypersensitive to NDGA and NDGA treatment aggravated the ABA-induced delay in the seed germination and cotyledon greening. Taken together, these results suggest that the CPR5 plays a regulatory role in the regulation of seed germination and early seedling growth through ABA and LOX pathways independently.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0019406