The role of Class Ⅱ KNOX family in controlling compound leaf patterning in Medicago truncatula.
KNOTTED-like homeobox
KNOXM
NAM
compound leaf
cytokinin
Journal
Journal of integrative plant biology
ISSN: 1744-7909
Titre abrégé: J Integr Plant Biol
Pays: China (Republic : 1949- )
ID NLM: 101250502
Informations de publication
Date de publication:
Oct 2023
Oct 2023
Historique:
received:
04
04
2023
accepted:
31
07
2023
medline:
27
10
2023
pubmed:
1
8
2023
entrez:
1
8
2023
Statut:
ppublish
Résumé
Compound leaf development requires the coordination of genetic factors, hormones, and other signals. In this study, we explored the functions of Class Ⅱ 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 MtKNOXⅠ-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 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 in M. truncatula.
Substances chimiques
Plant Proteins
0
Homeodomain Proteins
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2279-2291Subventions
Organisme : National Natural Science Foundation of China
ID : 31972958
Organisme : National Natural Science Foundation of China
ID : 32100284
Organisme : National Natural Science Foundation of China
ID : 32170833
Organisme : National Natural Science Foundation of Shandong Province
ID : ZR2020KC018
Organisme : National Natural Science Foundation of Shandong Province
ID : ZR202103010073
Informations de copyright
© 2023 Institute of Botany, Chinese Academy of Sciences.
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