Abstract
Plant small peptides, including CLAVATA3/EMBRYO SURROUNDING REGION-RELATED (CLE) and Epidermal Patterning Factor-Like (EPFL) peptides, play pivotal roles in coordinating developmental processes through cell-cell communication. Recent studies have revealed that the phloem-derived CLE peptides, CLE41/44 and CLE42, promote (pro-)cambial cell proliferation and inhibit xylem cell differentiation. The endodermis-derived EPFL peptides, EPFL4 and EPFL6, modulate vascular development in the stem. Further, several other peptide ligands CLE9, CLE10, and CLE45 play crucial roles in regulating vascular development in the root. The peptide signaling pathways interact with each other and crosstalk with plant hormone signals. In this mini-review, we summtarize the recent advances on peptides function in vascular development and discuss future perspectives for the research of the CLE and EPFL peptides.
Highlights
Intercellular communication and interaction are fundamentally important for plants to finetune growth and development in response to ever-changing environmental conditions (Kucukoglu and Nilsson, 2015)
An additional study showed that the GLYCOGEN SYNTHASE KINASE 3 (GSK3) protein BRASSINOSTEROID-INSENSITIVE 2 (BIN2)-LIKE 1 (BIL1) integrates the PHLOEM INTERCALATED WITH XYLEM/TDIF RECEPTOR (PXY/TDR) signaling through phosphorylating the auxin response factor MP/ARF5, which limits the effect of MP/ARF5 on ARR7 and ARR15 expression, enhancing vascular cambial activity (Han et al, 2018)
Significant progress has been made in our understanding of peptide signaling, including the tracheary element differentiation inhibitory factor (TDIF)-PXY/TDR module and the EPIDERMAL PATTERNING FACTOR-LIKE 4 (EPFL4)/6–ER/ER-LIKE 1 (ERL1) module, in regulating vascular development (Fukuda and Hardtke, 2020; Wang, 2020; Wang and Wang, 2020)
Summary
Reviewed by: Yuki Hirakawa, Gakushuin University, Japan Guodong Wang, Shaanxi Normal University, China. Plant small peptides, including CLAVATA3/EMBRYO SURROUNDING REGION-RELATED (CLE) and Epidermal Patterning Factor-Like (EPFL) peptides, play pivotal roles in coordinating developmental processes through cell-cell communication. Recent studies have revealed that the phloem-derived CLE peptides, CLE41/44 and CLE42, promote (pro-)cambial cell proliferation and inhibit xylem cell differentiation. The endodermis-derived EPFL peptides, EPFL4 and EPFL6, modulate vascular development in the stem. Several other peptide ligands CLE9, CLE10, and CLE45 play crucial roles in regulating vascular development in the root. The peptide signaling pathways interact with each other and crosstalk with plant hormone signals. In this mini-review, we summtarize the recent advances on peptides function in vascular development and discuss future perspectives for the research of the CLE and EPFL peptides
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