Vayssieres, Alice, Mishra, Priyanka ORCID: 0000-0003-1798-2306, Roggen, Adrian, Neumann, Ulla, Ljung, Karin ORCID: 0000-0003-2901-189X and Albani, Maria C. (2020). Vernalization shapes shoot architecture and ensures the maintenance of dormant buds in the perennial Arabis alpina. New Phytol., 227 (1). S. 99 - 116. HOBOKEN: WILEY. ISSN 1469-8137

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Abstract

Perennials have a complex shoot architecture with axillary meristems organized in zones of differential bud activity and fate. This includes zones of buds maintained dormant for multiple seasons and used as reservoirs for potential growth in case of damage. The shoot of Arabis alpina, a perennial relative of Arabidopsis thaliana, consists of a zone of dormant buds placed between subapical vegetative and basal flowering branches. This shoot architecture is shaped after exposure to prolonged cold, required for flowering. To understand how vernalization ensures the maintenance of dormant buds, we performed physiological and transcriptome studies, followed the spatiotemporal changes of auxin, and generated transgenic plants. Our results demonstrate that the complex shoot architecture in A. alpina is shaped by its flowering behavior, specifically the initiation of inflorescences during cold treatment and rapid flowering after subsequent exposure to growth-promoting conditions. Dormant buds are already formed before cold treatment. However, dormancy in these buds is enhanced during, and stably maintained after, vernalization by a BRC1-dependent mechanism. Post-vernalization, stable maintenance of dormant buds is correlated with increased auxin response, transport, and endogenous indole-3-acetic acid levels in the stem. Here, we provide a functional link between flowering and the maintenance of dormant buds in perennials.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Vayssieres, AliceUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mishra, PriyankaUNSPECIFIEDorcid.org/0000-0003-1798-2306UNSPECIFIED
Roggen, AdrianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Neumann, UllaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ljung, KarinUNSPECIFIEDorcid.org/0000-0003-2901-189XUNSPECIFIED
Albani, Maria C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-328651
DOI: 10.1111/nph.16470
Journal or Publication Title: New Phytol.
Volume: 227
Number: 1
Page Range: S. 99 - 116
Date: 2020
Publisher: WILEY
Place of Publication: HOBOKEN
ISSN: 1469-8137
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
UNDERGROUND ADVENTITIOUS BUDS; AUXIN TRANSPORT; PLANT-GROWTH; ARABIDOPSIS; EXPRESSION; STRIGOLACTONES; REQUIREMENT; OUTGROWTH; RESPONSES; SIGNALSMultiple languages
Plant SciencesMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/32865

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