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<p>Photosynthesis and translation are targets of metabolic control and development in plants, yet how stress signals coordinately regulate these opposing energy-producing and consuming processes remains enigmatic. Here, we unravel a growth control circuit that ties photosynthesis to translational control in response to biotic and abiotic signals. Our findings reveal that the L10-INTERACTING MYB DOMAIN-CONTAINING PROTEIN (LIMYB), a key player of the NUCLEAR SHUTTLE PROTEIN-INTERACTING KINASE 1 (NIK1)/ RIBOSOMAL PROTEIN L10 (RPL10) antiviral signaling pathway, not only downregulates translation genes, but also represses photosynthesis-related genes and photosynthesis itself. LIMYB repressor activity, regulated by phosphorylation, is crucial for the decline in photosynthesis under stress. NIK1 activation by PAMPs or the phosphomimetic NIK1-T474D represses photosynthesis-related genes and photosynthesis in control but not in <i>limyb</i> lines. Furthermore, heat and osmotic stress also activate the NIK1/RPL10/LIMYB signaling circuit in wild type. These stresses induce NIK1 phosphorylation, but not marker gene repression, in <i>limyb</i>, indicating that LIMYB connects NIK1 activation to stress-mediated downregulation of translation- and photosynthesis-related genes. This coordinated repression via the NIK1/RPL10/LIMYB module may help plants adapt to changing environments.</p>

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The immune NIK1/RPL10/LIMYB signaling module regulates photosynthesis and translation under biotic and abiotic stresses.

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月13日

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  • Marco Aurélio Ferreira,
  • Ruan M. Teixeira,
  • Otávio J. B. Brustolini,
  • Thainá F. F. Saia,
  • James Jean-Baptiste,
  • Nathalia G. A. Ribeiro,
  • Sâmera S. Breves,
  • Fellipe R. Sampaio,
  • Eulálio G. D. Santos,
  • Borys A. Leon,
  • Celio C. Oliveira,
  • Christiane E. M. Duarte,
  • Lucas L. Lima,
  • Leandro L. Oliveira,
  • Humberto J. O. Ramos,
  • Pedro A. B. Reis,
  • Elizabeth P. B. Fontes

摘要

Photosynthesis and translation are targets of metabolic control and development in plants, yet how stress signals coordinately regulate these opposing energy-producing and consuming processes remains enigmatic. Here, we unravel a growth control circuit that ties photosynthesis to translational control in response to biotic and abiotic signals. Our findings reveal that the L10-INTERACTING MYB DOMAIN-CONTAINING PROTEIN (LIMYB), a key player of the NUCLEAR SHUTTLE PROTEIN-INTERACTING KINASE 1 (NIK1)/ RIBOSOMAL PROTEIN L10 (RPL10) antiviral signaling pathway, not only downregulates translation genes, but also represses photosynthesis-related genes and photosynthesis itself. LIMYB repressor activity, regulated by phosphorylation, is crucial for the decline in photosynthesis under stress. NIK1 activation by PAMPs or the phosphomimetic NIK1-T474D represses photosynthesis-related genes and photosynthesis in control but not in limyb lines. Furthermore, heat and osmotic stress also activate the NIK1/RPL10/LIMYB signaling circuit in wild type. These stresses induce NIK1 phosphorylation, but not marker gene repression, in limyb, indicating that LIMYB connects NIK1 activation to stress-mediated downregulation of translation- and photosynthesis-related genes. This coordinated repression via the NIK1/RPL10/LIMYB module may help plants adapt to changing environments.