The role of Class â
¡ KNOX family in controlling compound leaf patterning in Medicago truncatula.
J Integr Plant Biol
; 65(10): 2279-2291, 2023 Oct.
Article
em En
| MEDLINE
| ID: mdl-37526388
ABSTRACT
Compound leaf development requires the coordination of genetic factors, hormones, and other signals. In this study, we explored the functions of Class â
¡ KNOTTED-like homeobox (KNOXII) genes in the model leguminous plant Medicago truncatula. Phenotypic and genetic analyses suggest that MtKNOX4, 5 are able to repress leaflet formation, while MtKNOX3, 9, 10 are not involved in this developmental process. Further investigations have shown that MtKNOX4 represses the CK signal transduction, which is downstream of MtKNOXâ
-mediated CK biosynthesis. Additionally, two boundary genes, FUSED COMPOUND LEAF1 (orthologue of Arabidopsis Class M KNOX) and NO APICAL MERISTEM (orthologue of Arabidopsis CUP-SHAPED COTYLEDON), are necessary for MtKNOX4-mediated compound leaf formation. These findings suggest, that among the members of MtKNOXâ
¡, MtKNOX4 plays a crucial role in integrating the CK pathway and boundary regulators, providing new insights into the roles of MtKNOXâ
¡ in regulating the elaboration of compound leaves in M. truncatula.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Arabidopsis
/
Medicago truncatula
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article