Genome-Wide Identification of the DOF Gene Family Involved in Fruitlet Abscission in Areca catechu L.
Int J Mol Sci
; 23(19)2022 Oct 04.
Article
de En
| MEDLINE
| ID: mdl-36233072
Fruitlet abscission frequently occurs in Areca catechu L. and causes considerable production loss. However, the inducement mechanism of fruitlet abscission remains mysterious. In this study, we observed that the cell architecture in the abscission zone (AZ) was distinct with surrounding tissues, and varied obviously before and after abscission. Transcriptome analysis of the "about-to-abscise" and "non-abscised" AZs were performed in A. catechu, and the genes encoding the plant-specific DOF (DNA-binding with one finger) transcription factors showed a uniform up-regulation in AZ, suggesting a role of the DOF transcription in A. catechu fruitlet abscission. In total, 36 members of the DOF gene family distributed in 13 chromosomes were identified from the A. catechu genome. The 36 AcDOF genes were classified into nine subgroups based on phylogenic analysis. Six of them showed an AZ-specific expression pattern, and their expression levels varied according to the abscission process. In total, nine types of phytohormone response cis-elements and five types of abiotic stress related cis-elements were identified in the promoter regions of the AcDOF genes. In addition, histochemical staining showed that lignin accumulation of vascular bundles in AZ was significantly lower than that in pedicel and mesocarp, indicating the specific characteristics of the cell architecture in AZ. Our data suggests that the DOF transcription factors might play a role in fruitlet abscission regulation in A. catechu.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Facteur de croissance végétal
/
Régulation de l'expression des gènes végétaux
Type d'étude:
Diagnostic_studies
/
Prognostic_studies
Langue:
En
Journal:
Int J Mol Sci
Année:
2022
Type de document:
Article
Pays d'affiliation:
Chine
Pays de publication:
Suisse