CaltechAUTHORS
Published September 23, 2022 | Version Submitted + Supplemental Material
Discussion Paper Open

The Phosphate Deprivation Response is Mediated by an Interaction between Brassinosteroid Signaling and Zinc in Tomato

Creators

  • 1. ROR icon University of California, Davis
  • 2. ROR icon California Institute of Technology
  • 3. ROR icon Zhejiang University
  • 4. ROR icon Technion – Israel Institute of Technology
  • 5. ROR icon Palacký University, Olomouc

Abstract

Phosphate is a necessary macronutrient for basic biological processes, plant growth, and agriculture. Plants modulate their root system architecture and cellular processes to adapt to phosphate deprivation albeit with a growth penalty. Excess application of phosphate fertilizer, on the other hand, leads to eutrophication and has a negative environmental impact. Moreover, phosphate mined from rock reserves is a finite and non-recyclable resource and its levels are nearing complete depletion. Here, we show that Solanum pennellii, a wild relative of tomato, is partially insensitive to phosphate deprivation. Furthermore, it mounts a constitutive response under phosphate sufficiency. We demonstrate that activated brassinosteroid signaling through a tomato BZR1 ortholog gives rise to the same constitutive phosphate deficiency response, which is dependent on zinc over-accumulation. Collectively, these results reveal an additional strategy by which plants can adapt to phosphate starvation.

Additional Information

The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license. We thank Tsuyoshi Nakagawa for the pGWB402 plasmid. GSD is supported by the Resnick Sustainability Institute Postdoctoral Fellowship. This work was funded by a BARD Research Grant Agreement No. IS4827-15 to SMB and SS-G. Additional support was provided by an HHMI Faculty Scholar and NSF 1856749, 2119820 and 1238243 and SS-G has received funding from the European Union's Horizon 2020 research and innovation program under the Grant Agreement No. [727929] (TOMRES). DT is grateful for financial support from European Regional Development Fund Project, Centre for Experimental Plant Biology No. CZ.02.1.01/0.0/0.0/16_019/0000738. The authors have declared no competing interest.

Attached Files

Submitted - 2022.09.21.508943v1.full.pdf

Supplemental Material - media-1.pdf

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2022.09.21.508943v1.full.pdf

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Additional details

Identifiers

Eprint ID
120325
Resolver ID
CaltechAUTHORS:20230322-366963000.10

Funding

Resnick Sustainability Institute
Binational Agricultural Research & Development Fund (BARD)
IS4827-15
Howard Hughes Medical Institute (HHMI)
NSF
IOS-1856749
NSF
IOS-2119820
NSF
IOS-1238243
European Research Council (ERC)
727929
European Regional Development Fund
CZ.02.1.01/0.0/0.0/16_019/0000738

Dates

Created
2023-03-28
Created from EPrint's datestamp field
Updated
2023-03-28
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Resnick Sustainability Institute