JAZ1 attenuates drought resistance by regulating JA and ABA signaling in rice
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PROVIDER: PRJNA420056 | ENA |
REPOSITORIES: ENA
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Project description:Jasmonates (JA) and abscisic acid (ABA) are phytohormones known to 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 OsJAZ1 was strongly responsive to JA treatment, and it was slightly responsive to ABA, salicylic acid, and abiotic stresses including drought, salinity, and cold. The OsJAZ1-overexpression rice plants were more sensitive to drought stress treatment than the wild-type rice Zhonghua 11 (ZH11) at both the seedling and reproductive stages, while the jaz1 T-DNA insertion mutant plants showed increased drought tolerance compared to the wild-type plants. The OsJAZ1-overexpression plants were hyposensitive to MeJA and ABA, whereas the jaz1 mutant plants were hypersensitive to MeJA and ABA. In addition, there were significant differences in shoot and root length between the OsJAZ1 transgenic and wild-type 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 OsJAZ1-overexpression plants and wild-type ZH11 under drought stress treatment. Quantitative real-time PCR confirmed the expression profiles of some of the differentially expressed genes, including OsNCED4, OsLEA3, RAB21, OsbHLH006, OsbHLH148, OsDREB1A, OsDREB1B, SNAC1, and OsCCD1. These results together suggest that OsJAZ1 plays a role in regulating the drought resistance of rice partially via the ABA and JA pathways.
2018-02-28 | GSE107425 | GEO
Project description: Not available
| S-EPMC5733117 | biostudies-literature
Project description:Plant hormones involved in environmental stresses, namely abscisic acid (ABA), salicylic acid (SA), and jasmonic acid (JA), have been shown to interact with each other in a complex manner. To address the network of the hormone interactions, we have investigated the changes in expression under multiple hormone treatments, ABA+SA and ABA+JA. We chose cultured cells to remove the difference in the response to hormones among developmental cells or tissues. The cells were treated for 3hr and 24hr to see the rapid or transient response and steady-state response. The obtained data indicate that ABA and SA affect antagonistically, but these hormones affected many genes collaboratively. Indeed, according to the microarray data, there are many genes that responded only to ABA+SA. In addition, the ABA+SA responsive genes also responded to ABA+JA. These data suggest that hormone crosstalk is more complicated than expected and that more systematic analysis is required to untangle the hormone crosstalk network.
2011-12-01 | GSE28600 | GEO
Project description:Plant hormones involved in environmental stresses, namely abscisic acid (ABA), salicylic acid (SA), and jasmonic acid (JA), have been shown to interact with each other in a complex manner. To address the network of the hormone interactions, we have investigated the changes in expression under multiple hormone treatments, ABA+SA and ABA+JA. We chose cultured cells to remove the difference in the response to hormones among developmental cells or tissues. The cells were treated for 3hr and 24hr to see the rapid or transient response and steady-state response. The obtained data indicate that ABA and SA affect antagonistically, but these hormones affected many genes collaboratively. Indeed, according to the microarray data, there are many genes that responded only to ABA+SA. In addition, the ABA+SA responsive genes also responded to ABA+JA. These data suggest that hormone crosstalk is more complicated than expected and that more systematic analysis is required to untangle the hormone crosstalk network. To investigate the hormonal interactions, Arabidopsis T87 cultured cells were exposed to ABA, SA, or JA alone, or two hormones simultaneously, ABA+SA or ABA+JA, for 3hr and 24 hr. Comparing the data among those treatments, the relationships among these hormones were deduced.
2011-12-01 | E-GEOD-28600 | biostudies-arrayexpress
Project description:Responses to drought in rice are regulated by transcription factor OsbZIP46 via ABA signaling. This work characterizes a protein MODD that negatively regulates OsbZIP46 activity and stability through HDAC-related chromatin remodeling and OsPUB70-mediated ubiquitination, respectively, to fine tune ABA signaling and drought resistance.
2016-09-07 | GSE83075 | GEO
Project description:Responses to drought in rice are regulated by transcription factor OsbZIP46 via ABA signaling. This work characterizes a protein MODD that negatively regulates OsbZIP46 activity and stability through HDAC-related chromatin remodeling and OsPUB70-mediated ubiquitination, respectively, to fine tune ABA signaling and drought resistance. Examination of mRNA levels in modd mutants and wild type plants under normal condition.
2016-09-07 | E-GEOD-83075 | biostudies-arrayexpress
Project description:The OsbZIP23 transcription factor has been characterized for its essential role in drought resistance in rice, but the mechanism is unknown. Here, we performed genome-wide identification of OsbZIP23 targets by immunoprecipitation sequencing (ChIP-seq) and RNA Sequencing (RNA-Seq) analyses in the OsbZIP23-overexpression, osbzip23 mutant, and wild-type rice under normal and drought stress conditions. OsbZIP23 directly regulates a large number of reported genes that function in stress response, hormone signaling, and developmental processes. Among these targets, we found that OsbZIP23 could positively regulate OsPP2C49, and overexpression of OsPP2C49 in rice resulted in significantly decreased sensitivity of the ABA response and rapid dehydration. Moreover, OsNCED4 (9-cis-epoxycarotenoid dioxygenase 4), a key gene in ABA biosynthesis, was also positively regulated by OsbZIP23. Together, our results suggest that OsbZIP23 acts as a central regulator in ABA signaling and biosynthesis, and drought resistance in rice.
2016-08-13 | GSE81462 | GEO
Project description:ABA INSENSITIVE 5 (ABI5) is a basic leucine zipper (bZIP) transcription factor which acts in the abscisic acid (ABA) signaling and is activated in response to abiotic stresses. It was shown that ABI5 binds ABA RESPONSIVE ELEMENTs (ABRE cis-elements) present in the promoters of regulated genes and activates or represses their transcription in response to stress. However, the precise role of barley (Hordeum vulgare) ABI5 in ABA signaling is still not well understood. We have identified a hvabi5.d mutant using barley TILLING (Targeted Induced Local Lesions IN Genomes) platform. hvabi5.d showed drought tolerant phenotype. To identify molecular mechanisms responsible for hvabi5.d response to drought, we perform drought-related gene expression analysis in barley in two genotypes: the wild-type (WT) barley cultivar 'Sebastian’ and hvabi5.d mutant; in two time points: (1) optimal water conditions, and (2) after 10 days of drought stress in the second leaf; analyses were performed in three biological replicates. Global transcriptome analysis (Agilent Barley Microarray) of the mutant and parent cultivar ‘Sebastian’ exposed to drought enabled to identify genes in hvabi5.d which were associated with better response of the mutant to drought. These data increase our understanding of HvABI5-dependent modulation of plant response to the drought stress.
2020-07-22 | E-MTAB-9072 | biostudies-arrayexpress
Project description:Histone H2B monoubiquitination (H2Bub1) has been implicated in several important physiological and developmental processes, but its role in the regulation of stress responses remains elusive. Here, we report that H2Bub1 is crucially involved in abscisic acid (ABA) signaling and drought response in rice. We found the rice (Oryza sativa) HISTONE MONOUBIQUITINATION2 (OsHUB2), an E3 ligase for H2Bub1, interacted with OsbZIP46, a key transcription factor regulating ABA signaling and drought response in rice. Genetic analyses suggest that OsHUB2, induced by drought and ABA, positively modulates ABA sensitivity and drought resistance. The H2Bub1 levels were increased in the promoters of OsbZIP46 target genes under the drought stress and ABA treatments, and the increased H2Bub1 levels were positively correlated to the increased expression levels of the target genes. Interestingly, MODD, a reported suppressor of ABA signaling and drought resistance through mediation of OsbZIP46 deactivation and degradation, can repress the H2Bub1 level in the promoters of OsbZIP46 target genes by recruiting a putative deubiquitinase OsOTLD1. Suppression of OsOTLD1 in vivo resulted in increased H2Bub1 levels and expression of drought-responsive genes targeted by OsbZIP46. These findings established an elaborate mechanism of histone monoubiquitination in the fine-turning of ABA signaling and drought response via balancing H2Bub1 deposition and removal.
2019-02-09 | GSE117047 | GEO
Project description:We applied the tiling arrays to study the Arabidopsis whole-genome transcriptome under drought, cold, high-salinity and ABA treatment conditions and idenfied many stress- or ABA- responsive putative functional RNAs and fully-overlapping sense-antisense transcripts in Arabidopsis genome. Keywords: stress response
2008-11-19 | GSE9646 | GEO