Transforming compound leaf patterning by manipulating REVOLUTA in Medicago truncatula.
Medicago
REVOLUTA
HD-ZIPIII gene family
compound leaf patterning
leaf polarity
Journal
The Plant journal : for cell and molecular biology
ISSN: 1365-313X
Titre abrégé: Plant J
Pays: England
ID NLM: 9207397
Informations de publication
Date de publication:
11 2019
11 2019
Historique:
received:
25
02
2019
accepted:
27
06
2019
pubmed:
28
7
2019
medline:
4
8
2020
entrez:
28
7
2019
Statut:
ppublish
Résumé
Leaves are derived from the shoot apical meristem with three distinct axes: dorsoventral, proximodistal and mediolateral. Different regulators are involved in the establishment of leaf polarity. Members of the class III homeodomain-leucine zipper (HD-ZIPIII) gene family are critical players in the determination of leaf adaxial identity mediated by microRNA165/166. However, their roles in compound leaf development are still unclear. By screening of a retrotransposon-tagged mutant population of the model legume plant Medicago truncatula, a mutant line with altered leaflet numbers was isolated and characterized. Mutant leaves partially lost their adaxial identity. Leaflet numbers in the mutant were increased along the proximodistal axis, showing pinnate pentafoliate leaves in most cases, in contrast to the trifoliate leaves of the wild type. Detailed characterization revealed that a lesion in a HD-ZIPIII gene, REVOLUTA (MtREV1), resulted in the defects of the mutant. Overexpression of MtMIR166-insensitive MtREV1 led to adaxialized leaves and ectopic leaflets along the dorsoventral axis. Accompanying the abnormal leaf patterning, the free auxin content was affected. Our results demonstrate that MtREV1 plays a key role in determination of leaf adaxial-abaxial polarity and compound leaf patterning, which is associated with proper auxin homeostasis.
Substances chimiques
Homeodomain Proteins
0
Indoleacetic Acids
0
MicroRNAs
0
Plant Growth Regulators
0
Plant Proteins
0
RNA, Plant
0
Banques de données
GENBANK
['NP_175627', 'NP_195014', 'NP_181018', 'NP_174337', 'NP_200877']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
562-571Informations de copyright
© 2019 The Authors The Plant Journal © 2019 John Wiley & Sons Ltd.
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