Skip to Main content Skip to Navigation
Journal articles

VERNALIZATION1 controls developmental responses of winter wheat under high ambient temperatures

Abstract : Low temperatures are required to regulate the transition from vegetative to reproductive growth via a pathway called vernalization. In wheat, vernalization predominantly involves the cold upregulation of the floral activator VERNALIZATION1 (VRN1). Here, we have used an extreme vernalization response, identified through studying ambient temperature responses, to reveal the complexity of temperature inputs into VRN-A1, with allelic inter-copy variation at a gene expansion of VRN-A1 modulating these effects. We find that the repressors of the reproductive transition, VERNALIZATION2 (VRN2) and ODDSOC2, are re-activated when plants experience high temperatures during and after vernalization. In addition, this re-activation is regulated by photoperiod for VRN2 but was independent of photoperiod for ODDSOC2. We also find this warm temperature interruption affects flowering time and floret number and is stage specific. This research highlights the important balance between floral activators and repressors in coordinating the response of a plant to temperature, and that the absence of warmth is essential for the completion of vernalization. This knowledge can be used to develop agricultural germplasm with more predictable vernalization responses that will be more resilient to variable growth temperatures.
Document type :
Journal articles
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-02289523
Contributor : Archive Ouverte Prodinra <>
Submitted on : Friday, January 22, 2021 - 9:31:46 PM
Last modification on : Tuesday, February 23, 2021 - 11:06:02 AM

File

Dixon et al_2019_VERNALIZATION...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Laura E. Dixon, Ildiko Karsai, Tibor Kiss, Nikolai M. Adamski, Zhenshan Liu, et al.. VERNALIZATION1 controls developmental responses of winter wheat under high ambient temperatures. Development (Cambridge, England), Company of Biologists, 2019, 146 (3), pp.dev172684. ⟨10.1242/dev.172684⟩. ⟨hal-02289523⟩

Share

Metrics

Record views

189

Files downloads

26