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Title: The role of Class Ⅱ KNOX family in controlling compound leaf patterning in Medicago truncatula
Abstract Compound leaf development requires the coordination of genetic factors, hormones, and other signals. In this study, we explored the functions of Class ⅡKNOTTED‐like homeobox (KNOXII) genes in the model leguminous plantMedicago truncatula. Phenotypic and genetic analyses suggest thatMtKNOX4,5are able to repress leaflet formation, whileMtKNOX3,9,10are not involved in this developmental process. Further investigations have shown that MtKNOX4 represses the CK signal transduction, which is downstream of MtKNOXⅠ‐mediated CK biosynthesis. Additionally, two boundary genes,FUSED COMPOUND LEAF1(orthologue ofArabidopsisClass MKNOX) andNO APICAL MERISTEM(orthologue ofArabidopsis CUP‐SHAPED COTYLEDON), are necessary for MtKNOX4‐mediated compound leaf formation. These findings suggest, that among the members of MtKNOXⅡ, MtKNOX4 plays a crucial role in integrating the CK pathway and boundary regulators, providing new insights into the roles of MtKNOXⅡ in regulating the elaboration of compound leaves inM. truncatula.  more » « less
Award ID(s):
2233714
PAR ID:
10507440
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ; ; ;
Publisher / Repository:
Wiley
Date Published:
Journal Name:
Journal of Integrative Plant Biology
Volume:
65
Issue:
10
ISSN:
1672-9072
Page Range / eLocation ID:
2279 to 2291
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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