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May 9, 2023Journal of Experimental Botany

Loss of S -nitrosoglutathione reductase disturbs phytohormone homeostasis and regulates shoot side branching and fruit growth in tomato

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Authors

RZRafael ZuccarelliMRMarta Rodríguez-RuizFSFernanda O. Silva

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Overview

Genetic study reveals reduced fruit size and increased shoot branching in SlGSNOR-deficient tomato, indicating nitric oxide's vital role in yield.

Key Points

  • To investigate the role of endogenous nitric oxide and S-nitrosoglutathione reductase in regulating shoot architecture, fruit set, and fruit development in tomato.
  • Generated and characterized SlGSNOR-silenced, knockout (slgsnor), and overexpressing tomato (Solanum lycopersicum) lines.
  • Assessed protein tyrosine nitration, S-nitrosation levels, and shoot basipetal polar auxin transport.
  • Conducted transcriptional profiling and evaluated phytohormone dynamics, chloroplast development, and carbon metabolism in early-developing fruit ovaries.
  • SlGSNOR silencing and knockout significantly increased shoot side branching and decreased fruit size and yield, whereas overexpression produced negligible phenotypic changes.
  • Deficiency in SlGSNOR elevated protein tyrosine nitration and S-nitrosation while disrupting polar auxin transport and auxin signaling in leaf primordia and ovaries.
  • Loss of SlGSNOR triggered early fruit transcriptional reprogramming that curbed pericarp cell proliferation through suppressed auxin, gibberellin, and cytokinin signaling, alongside impaired chloroplast development.

Cite This Study

Zuccarelli et al. (2023) studied this question.

synapsesocial.com/papers/6a7b8bef24f98b6d3fc28362https://doi.org/10.1093/jxb/erad166
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Nitric oxide enhances <scp>SlSPL10</scp> ‐mediated transcriptional repression of carotenoid synthesis genes to delay tomato fruit carotenoid accumulation2026 · 1 citations
  2. 2Excess nitric oxide alters cellular pH to restrict salicylic acid movement and systemic immunity2026
  3. 3The Central Role of GSNOR: Decoding Nitric Oxide Signaling for Crop Stress Tolerance2025
  4. 4The Crucial Role of SlGSNOR in Regulating Postharvest Tomato Fruit Ripening2024
  5. 5Nitric oxide delays tomato fruit carotenoid accumulation by inhibiting the transcriptional activation of the SlbZIP16-SlPol η module2026