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Vernalization shapes shoot architecture and ensures the maintenance of dormant buds in the perennial Arabis alpina

Vayssieres, Alice and Mishra, Priyanka and Roggen, Adrian and Neumann, Ulla and Ljung, Karin and Albani, Maria C. (2020). Vernalization shapes shoot architecture and ensures the maintenance of dormant buds in the perennial Arabis alpina. New Phytologist. 227 , 99-115
[Research article]

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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.

Authors/Creators:Vayssieres, Alice and Mishra, Priyanka and Roggen, Adrian and Neumann, Ulla and Ljung, Karin and Albani, Maria C.
Title:Vernalization shapes shoot architecture and ensures the maintenance of dormant buds in the perennial Arabis alpina
Series Name/Journal:New Phytologist
Year of publishing :2020
Volume:227
Page range:99-115
Number of Pages:17
Publisher:WILEY
ISSN:0028-646X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Arabis alpina, bud dormancy, dormant bud bank, flowering, perennial, polycarpic, shoot architecture, vernalization
URN:NBN:urn:nbn:se:slu:epsilon-p-111421
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111421
Additional ID:
Type of IDID
DOI10.1111/nph.16470
Web of Science (WoS)000536574500012
ID Code:23263
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:14 Apr 2021 11:43
Metadata Last Modified:14 Apr 2021 11:51

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