Plant Peptide Hormones: Three Decades of Discovery and Emerging Paradigms
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ID: 329698
2026
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Abstract
Plant peptide hormones have reshaped our understanding of intercellular signaling in plants. Once considered absent in plants, peptide-based signaling pathways emerged as key regulators of plant growth, development, environmental responses and immunity. A paradigm shift occurred with the discoveries of Systemin and Phytosulfokine (PSK) in the 1990s as well as the identifications of receptor-like kinases (RLKs) regulating important biological processes. Over the past three decades, a repertoire of peptide hormone families has been expanded enormously, with deeper understandings of peptide modifications, cleavage, modes of actions, and receptor binding and signal transduction. In this review, I highlight selected peptide hormone families, Systemin, PSK, INFLORESCENCE DEFICIENT IN ABSCISSION (IDA)/IDA-LIKES, CLAVATA3/EMBRYO SURROUNDING REGION (CLE), and EPIDERMAL PATTERNING FACTORs (EPF)/EPF-LIKES, and discuss how individual discoveries of the peptides and their cognate receptors have shaped emerging concepts in plant peptide signaling. Celebrating this Centennial Issue, emphasis will be given on contributions published in Plant Physiology. Finally, I discuss how expanding genomic resources and advanced technologies will accelerate the discovery and engineering of peptide signaling pathways to enhance plant resilience.
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| Authors | Keiko Torii |
| Journal | Plant physiology and biochemistry : PPB |
| Year | 2026 |
| DOI |
10.1093/plphys/kiag699
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| URL | |
| Keywords | Keywords not found |
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