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Marchantia polymorpha

ABSTRACT: Transcriptome analysis of Marchantia polymorpha MpBZR3 overexpressing plants

PROVIDER: PRJDB16186 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR491457_1.fastq.gz	Fastqsanger.gz
	DRR491457_2.fastq.gz	Fastqsanger.gz
	DRR491458_1.fastq.gz	Fastqsanger.gz
	DRR491458_2.fastq.gz	Fastqsanger.gz
	DRR491459_1.fastq.gz	Fastqsanger.gz

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Transcriptome changes triggered by the loss of function of gene Mppcs in genome-edited Marchantia polymorpha plants

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DE-ETIOLATED1 has a role in the circadian clock of the liverwort Marchantia polymorpha

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A single JAZ repressor controls the jasmonate pathway in Marchantia polymorpha

Project description:JAZ genes are negative regulators of jasmonate responses with a dual function as repressors of transcription factors and co-receptors, together with COI1, of the hormone jasmonoyl-isoleucine (JA-Ile). This family has been mainly studied in angiosperms, where high gene redundancy hinders the characterization of a complete depletion of JAZ function. Moreover, the recent discovery that JA-Ile is not the sole COI1/JAZ ligand in land plants, as dn-OPDA is the bioactive ligand in Marchantia polymorpha, underscores the importance of studying JAZ co-receptors in bryophytes. Here we exploited the low gene redundancy of the liverwort Marchantia polymorpha to characterize the function of the single MpJAZ in this early-divergent plant lineage. We demonstrate that MpJAZ is the ortholog of AtJAZ and acts as a repressor of dinor-OPDA responses in Marchantia. Mpjaz mutants show a dwarf phenotype and severe developmental defects related to growth inhibition, consistent with a constitutive activation of the dinor-OPDA pathway and the overaccumulation of both dinor-OPDA and its precursor OPDA. The expression of AtJAZ3 in Mpjaz complements MpJAZ repressor function, indicating that JAZ function is conserved across land plants. However, AtJAZ3 is unable to form co-receptor complexes with MpCOI1 and dn-OPDA, which evidences that the Jas domain, and not only COI1, determines ligand specificity.

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