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

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

PROVIDER: PRJNA639276 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12007900.fastq.gz	Fastqsanger.gz
	SRR12007901.fastq.gz	Fastqsanger.gz
	SRR12007902.fastq.gz	Fastqsanger.gz
	SRR12007903.fastq.gz	Fastqsanger.gz
	SRR12007904.fastq.gz	Fastqsanger.gz

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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

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Project description:Arabis alpina overview

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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

Project description:Arabis alpina genome assembly

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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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Arabis alpina fungal microbiome

Project description:Arabis alpina fungal microbiome

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Keep a distance to be different: axillary bud initiating at a distance to the shoot apical meristem are crucial for the perennial life style of Arabis alpina

Project description:Purpose: In higher plants, perennialism is achieved through axillary buds and side-shoots that stay vegetative. This work aims to analyze the pattern of axillary bud (AB) formation in the perennial model plant Arabis alpina and to study the role of LATERAL SUPPRESSOR (AaLAS) gene in this process. Methods: This study combines stereomicroscopic analysis with RNA sequencing to monitor how patterns of AB formation and gene expression correlate. The role of AaLAS was studied using an RNAi approach. Results: During vegetative development, ABs initiate at a distance to the SAM, whereas after induction of flowering ABs initiate adjacent to the SAM. Dormant buds are established before onset of vernalization. Transcript profiles of ABs initiated at a distance were different from that of the SAM, whereas transcript patterns of buds initiated in close proximity were similar to the corresponding SAM. Knock-down of AaLAS leads to loss of both dormant buds and vegetative side-shoots, strongly compromising perennial life style. Conclusions: AB formation is regulated differently during vegetative and reproductive development. New meristems that show gene expression profiles different from the SAM are established at a distance to the SAM. AaLAS plays an essential role in perennial life cycle modulating the establishment of dormant buds and vegetative side-shoots.

2020-03-03 | GSE140316 | GEO

Arabis alpina flowering behavior

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

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Project description:Whole-genome resequencing of Arabis alpina populations from Swiss Alps.

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