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DaStaAlpi

ABSTRACT: Stachys alpina

PROVIDER: PRJEB85036 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
		Other
	ERR14224626_1.fastq.gz	Fastqsanger.gz
	ERR14224626_2.fastq.gz	Fastqsanger.gz
	ERR14209146.fastq.gz	Fastqsanger.gz
	ERR14209147.fastq.gz	Fastqsanger.gz

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Project description:Polycarpic perennials maintain vegetative growth after ﬂowering. PERPETUAL FLOWERING 1 (PEP1), the orthologue of FLOWERING LOCUS C (FLC) inArabis alpina regulates ﬂowering and contributes to polycarpy in a vernalisation-dependent pathway. pep1 mutants do not require vernalisation to ﬂower and have reduced return to vegetative growth as all of their axillary branches become reproductive. To identify additional genes that regulate ﬂowering and contribute to perennial traits we performed an enhancer screen of pep1. Using mapping-by-sequencing, we cloned a mutant (enhancer of pep1-055, eop055), performed transcriptome analysis and physiologically characterised the role it plays on perennial traits in an introgression line carrying the eop055 mutation and a functional PEP1 wild-type allele. eop055 ﬂowers earlier than pep1 and carries a lesion in the A. alpina orthologue of the APETALA2 (AP2)-like gene, TARGET OF EAT2 (AaTOE2). AaTOE2 is a ﬂoral repressor and acts upstream of SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE 5 (AaSPL5). In the wild-type background, which requires cold treatment to ﬂower, AaTOE2 regulates the age-dependent response to vernalisation. In addition, AaTOE2 ensures the maintenance of vegetative growth by delaying axillary meristem initiation and repressing ﬂowering of axillary buds before and during cold exposure. We conclude that AaTOE2 is instrumental in ﬁne tuning different developmental traits in the perennial life cycle of A. alpina.

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