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Author Fu J., Wu H., Ma S., Xiang D., Liu R., Xiong L.
Title OsJAZ1 Attenuates Drought Resistance by Regulating JA and ABA Signaling in Rice.
Abstract:
Jasmonates (JAs) and abscisic acid (ABA) are phytohormones known play important roles in plant response and adaptation to various abiotic stresses including salinity, drought, wounding, and cold. JAZ (JASMONATE ZIM-domain) proteins have been reported to play negative roles in JA signaling. However, direct evidence is still lacking that JAZ proteins regulate drought resistance. In this study, OsJAZ1 was investigated for its role in drought resistance in rice. Expression of <i>OsJAZ1</i> was strongly responsive to JA treatment, and it was slightly responsive to ABA, salicylic acid, and abiotic stresses including drought, salinity, and cold. The <i>OsJAZ1</i>-overexpression rice plants were more sensitive to drought stress treatment than the wild-type (WT) rice Zhonghua 11 (ZH11) at both the seedling and reproductive stages, while the <i>jaz1</i> T-DNA insertion mutant plants showed increased drought tolerance compared to the WT plants. The <i>OsJAZ1</i>-overexpression plants were hyposensitive to MeJA and ABA, whereas the <i>jaz1</i> mutant plants were hypersensitive to MeJA and ABA. In addition, there were significant differences in shoot and root length between the OsJAZ1 transgenic and WT plants under the MeJA and ABA treatments. A subcellular localization assay indicated that OsJAZ1 was localized in both the nucleus and cytoplasm. Transcriptome profiling analysis by RNA-seq revealed that the expression levels of many genes in the ABA and JA signaling pathways exhibited significant differences between the <i>OsJAZ1</i>-overexpression plants and WT ZH11 under drought stress treatment. Quantitative real-time PCR confirmed the expression profiles of some of the differentially expressed genes, including <i>OsNCED4, OsLEA3, RAB21, OsbHLH006, OsbHLH148, OsDREB1A, OsDREB1B, SNAC1</i>, and <i>OsCCD1</i>. These results together suggest that OsJAZ1 plays a role in regulating the drought resistance of rice partially via the ABA and JA pathways.
Journal Front Plant Sci
Country China
Volume 8
Pages 2108
Year 2017
PubMed ID 29312378
PubMed Central ID 5733117
DOI 10.3389/fpls.2017.02108
URL -
Relation
Gene DREB1A DREB1B EG2 LEA3-1 NCED3 RAB16A _ _ _ _
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 -
/rice/oryzabase