2. Academic Validation
  3. A regulatory module mediating temperature control of cell-cell communication facilitates tree bud dormancy release

A regulatory module mediating temperature control of cell-cell communication facilitates tree bud dormancy release

  • EMBO J. 2024 Oct 3. doi: 10.1038/s44318-024-00256-5.
Shashank K Pandey # 1,  Jay Prakash Maurya # 1 2,  Bibek Aryal # 1,  Kamil Drynda # 3,  Aswin Nair 1,  Pal Miskolczi 1,  Rajesh Kumar Singh 1 4,  Xiaobin Wang 1 5,  Yujiao Ma 1 6,  Tatiana de Souza Moraes 7,  Emmanuelle M Bayer 7,  Etienne Farcot 3,  George W Bassel 8,  Leah R Band 3 9,  Rishikesh P Bhalerao 10
Affiliations

Affiliations

  • 1 Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 87, Umeå, Sweden.
  • 2 Plant Development and Molecular Biology Lab, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India.
  • 3 Centre for Mathematical Medicine and Biology, School of Mathematical Sciences, University of Nottingham, Nottingham, NG7 2RD, UK.
  • 4 Biotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, 176061, India.
  • 5 College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang, 310058, P. R. China.
  • 6 Shandong Academy of Grape, Jinan, Shandong, 250100, P. R. China.
  • 7 Laboratoire de Biogenèse Membranaire, UMR5200, CNRS, Université de Bordeaux, Villenave d'Ornon, France.
  • 8 School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK.
  • 9 Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK.
  • 10 Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 87, Umeå, Sweden. Rishi.Bhalerao@slu.se.
  • # Contributed equally.
PMID: 39363036 DOI: 10.1038/s44318-024-00256-5
Abstract

The control of cell-cell communication via plasmodesmata (PD) plays a key role in plant development. In tree buds, low-temperature conditions (LT) induce a switch in plasmodesmata from a closed to an open state, which restores cell-to-cell communication in the shoot apex and releases dormancy. Using genetic and cell-biological approaches, we have identified a previously uncharacterized transcription factor, Low-temperature-Induced MADS-box 1 (LIM1), as an LT-induced, direct upstream activator of the gibberellic acid (GA) pathway. The LIM1-GA module mediates low temperature-induced plasmodesmata opening, by negatively regulating callose accumulation to promote dormancy release. LIM1 also activates expression of FT1 (FLOWERING LOCUS T), another LT-induced factor, with LIM1-FT1 forming a coherent feedforward loop converging on low-temperature regulation of gibberellin signaling in dormancy release. Mathematical modeling and experimental validation suggest that negative feedback regulation of LIM1 by gibberellin could play a crucial role in maintaining the robust temporal regulation of bud responses to low temperature. These results reveal genetic factors linking temperature control of cell-cell communication with regulation of seasonally-aligned growth crucial for adaptation of trees.

Keywords

Callose; Dormancy; Gibberellins; Plasmodesmata; Temperature.

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