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Arabis alpina flowering behavior

ABSTRACT: Geographically structured variation in flowering behavior among European populations of perennial Arabis alpina

PROVIDER: PRJEB50293 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	ERR8137520_1.fastq.gz	Fastqsanger.gz
	ERR8137520_2.fastq.gz	Fastqsanger.gz
	ERR8137530_1.fastq.gz	Fastqsanger.gz
	ERR8137530_2.fastq.gz	Fastqsanger.gz

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Arabis alpina

Project description:Mechanisms of age-dependent response to winter temperature in perennial flowering of Arabis alpina.

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Cytokinin-promoted secondary growth and nutrient storage in the perennial stem zone of Arabis alpina

Project description:Perennial plants maintain their life span through several growth seasons. Arabis alpina serves as model Brassicaceae species to study perennial traits. A. alpina lateral stems have a proximal vegetative zone with a dormant bud zone, and a distal senescing seed-producing inflorescence zone. We addressed the questions of how this zonation is distinguished at the anatomical level, whether it is related to nutrient storage, and which signals affect the zonation. We found that the vegetative zone ehxibits secondary growth, which we termed the perennial growth zone (PZ). High-molecular weight carbon compounds accumulate there in cambium and cambium derivatives. Neither vernalization nor flowering were requirements for secondary growth and sequestration of storage compounds. The inflorescence zone with only primary growth, termed annual growth zone (AZ), or roots exhibited different storage characteristics. Following cytokinin application, cambium activity was enhanced and secondary phloem parenchyma was formed in the PZ and also in the AZ. In transcriptome analysis cytokinin-related genes represented enriched gene ontology terms and were expressed at higher level in PZ than AZ. Thus, A. alpina uses primarily the vegetative PZ for nutrient storage, coupled to cytokinin-promoted secondary growth. This finding lays a foundation for future studies addressing signals for perennial growth.

2020-06-14 | GSE152417 | GEO

Regulation of flowering by AaTFL1 in Arabis alpina

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Project description:Arabis alpina genome assembly

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Mechanisms of age-dependent response to winter temperature in perennial flowering of Arabis alpina.

Project description:Transcriptomic profile of Arabis alpina apex enriched material. We compared apices from plants grown for 2 weeks in long days (20°C) (juvenile) with apices from plants grown for 8 weeks in long days (20°C) (adult) and apices from plants grown for 2 weeks and then shifted in vernalization for 4 weeks with apices from plants grown for 8 weeks and than shifted to vernalization for 4 weeks.

2013-05-27 | GSE40455 | GEO

Mechanisms of age-dependent response to winter temperature in perennial flowering of Arabis alpina.

Project description:Transcriptomic profile of Arabis alpina apex enriched material. We compared apices from plants grown for 2 weeks in long days (20M-BM-0C) (juvenile) with apices from plants grown for 8 weeks in long days (20M-BM-0C) (adult) and apices from plants grown for 2 weeks and then shifted in vernalization for 4 weeks with apices from plants grown for 8 weeks and than shifted to vernalization for 4 weeks. 2x2 factorial design. 2 starting ages (2 weeks and 8 weeks) and 2 developmental conditions (before and after vernalization). 4 biological replicates for each condition (16 arrays). Reference: pool of the 16 arrays.

2013-05-27 | E-GEOD-40455 | biostudies-arrayexpress

Arabis alpina fungal microbiome

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Regulation of flowering by TOE2 in Arabidopsis thaliana and Arabis alpina

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RNA-Seq analysis of adventitious rooting zone of Arabis alpina main stem during extended cold exposure.

Project description:Arctic alpine species experience extended periods of cold and unpredictable conditions during flowering. Thus, often, alpine plants use both sexual and asexual means of reproduction to maximise fitness and ensure reproductive success. We used the arctic alpine perennial Arabis alpina to explore the role of prolonged cold exposure on adventitious rooting. We exposed plants to 4 °C for different durations and scored the presence of adventitious roots on the main stem and axillary branches. Our physiological studies demonstrated the presence of adventitious roots after 21 weeks at 4 °C saturating the effect of cold on this process. Notably, adventitious roots on the main stem developingin specific internodes allowed us to identify the gene regulatory network involved in the formation of adventitious roots in cold using transcriptomics. These data and histological studies indicated that adventitious roots in A. alpina stems initiate during cold exposure and emerge after plants experience growth promoting conditions. While the initiation of adventitious root was not associated with changes of DR5 auxin response and free endogenous auxin level in the stems, the emergence of the adventitious root primordia was. Using the transcriptomic data, we discerned the sequential hormone responses occurring in various stages of adventitious root formation and identified supplementary pathways putatively involved in adventitious root emergence, such as glucosinolate metabolism. Together, our results highlight the role of low temperature during clonal growth in alpine plants and provide insights on the molecular mechanisms involved at distinct stages of adventitious rooting.

2024-04-01 | GSE176054 | GEO

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