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E-MEXP-1863

ABSTRACT: Transcription profiling of Arabidopsis wild type and abi1td mutant plants stressed by ozone or drought to better understand ABA signalling

PROVIDER: E-MEXP-1863 | ExpressionAtlas | 2015-10-22

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-MEXP-1863-analysis-methods.tsv	Tabular
	E-MEXP-1863-atlasExperimentSummary.Rdata	Rdata
	E-MEXP-1863-configuration.xml	Xml
	E-MEXP-1863-percentile-ranks.tsv	Tabular
	E-MEXP-1863.condensed-sdrf.tsv	Tabular

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Transcription profiling of Arabidopsis wild type and abi1td mutant plants stressed by ozone or drought to better understand ABA signalling

Project description:Ozone at an elevated level is an important environmental stress factor that limits plant growth and development. To test how O3-induced ROS signalling interacts with the ABA pathway we present a global characterization of O3-responsive genes in the abi1td mutant. To understand better ABA signalling and the interactions between stress-response pathways we also performed a microarray analysis of drought-treated abi1td and WT plants. Since ABA signalling is well known to mediate defined responses based on the WT and different mutants analysis in drought stress conditions, the comparison of the O3 and drought stress response in abi1td enabled the identification of new processes depending on ABA-related pathways in O3-treated plants. Altogether, our findings indicate that ABI1 plays the role of a general signal transducer linking diferrent hormone signalling pathways to O3 stress tolerance.<br><br><br><br>Key words: ROS signalling; ABA signalling; ozone stress; drought stress; environmental stress; gene knockout;

2009-08-27 | E-MEXP-1863 | biostudies-arrayexpress

E-MEXP-1967

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2015-10-22 | E-MEXP-1967 | ExpressionAtlas

E-GEOD-11175

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JAZ1 attenuates drought resistance by regulating JA and ABA signaling in rice

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.

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E-GEOD-54466

Project description:Transcription profiling by array of drought-stress response in wild type and mutant rice

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Project description:Transcription profiling of pistils from Arabidopsis wild type, ant-4 mutant and ino-1mutant plants at different developmental stages

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Project description:Transcription profiling by array of Arabidopsis wild type and AMP1 mutant seeds

2014-07-03 | E-MEXP-3181 | ExpressionAtlas

Comparative transcriptome analysis between wild-type and gpa1 mutant in response to ABA

Project description:Mutations in the heterotrimeric G-protein a-subunit of Arabidopsis, GPA1, leads to deficiency in ABA-induced stomatal closure (Wang et al., 2001). To further investigate whether GPA1 is involved in the regulation of gene expression in response to ABA, we examined the induction of known ABA-inducible genes in the gpa1 mutant and compared it to wild-type. We found significant differences in levels of ABA-induced expression between wild-type and gpa1 mutant. In order to systematically investigate GPA1 involvement in ABA signalling leading to gene expression, we are requesting the transcriptome analysis of the gpa1 mutant in response to ABA.In detail, 2 week old wild-type and gpa1 plants grown in the 16/8 hrs light and dark cycle will be treated with either ABA or with a control solution for 3 hours. 10 plants will be used per sample to produce RNA, to give 4 samples, one for each chip: gpa1-1 mutant in the presence (chip1) or absence of ABA (chip2) and wild-type (WS2) in the presence (chip3) or absence of ABA (chip4). Keywords: strain_or_line_design

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