1. Genome-wide identification of the mitogen-activated protein kinase (MAPK) family in cotton (Gossypium hirsutum) reveals GhMPK6 involved in fiber elongation
- Author
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Yi-Hao Chen, Xue-Bao Li, Yong Zheng, Jing-Bo Zhang, and Na-Na Wang
- Subjects
0106 biological sciences ,0301 basic medicine ,MAPK/ERK pathway ,Plant Science ,01 natural sciences ,Gene Expression Regulation, Enzymologic ,03 medical and health sciences ,chemistry.chemical_compound ,Exon ,Gene Expression Regulation, Plant ,Genetics ,Gene family ,Brassinosteroid ,Cotton Fiber ,Gene ,Plant Proteins ,Mitogen-Activated Protein Kinase Kinases ,Gossypium ,biology ,Kinase ,General Medicine ,Cell biology ,030104 developmental biology ,chemistry ,Mitogen-activated protein kinase ,biology.protein ,Phosphorylation ,Agronomy and Crop Science ,Genome, Plant ,Genome-Wide Association Study ,010606 plant biology & botany - Abstract
Mitogen-activated protein kinases (MAPKs) are important in regulating plant development as well as stress response. In this study, we genome-widely identified 56 MAPK genes in upland cotton. These MAPK genes unequally distribute on 22 chromosomes of cotton genome, but no MAPK gene is located on At_Chr6, Dt_Chr6, At_Chr13 and Dt_Chr13. The exons and introns in GhMAPK gene family vary widely at the position, number and length. Furthermore, GhMAPK family can be divided into 4 groups (A, B, C and D), and the TEY type of T-loop exists in three groups (A, B and C), but the TDY type of T-loop is only in group D. Further study revealed that some GhMAPK genes (including GhMPK6) are preferentially expressed in elongating fibers. GhMPK6 maintains a high phosphorylation level in elongating fibers, and its phosphorylation was enhanced in fibers by phytohormones brassinosteroid (BR), ethylene and indole-3-acetic acid (IAA). Additionally, GhMPK6 could interact with GhMKK2-2 and GhMKK4, suggesting that GhMKK2-2/4-GhMPK6 module may be involved in phosphorylation of its downstream proteins for regulating fiber elongation of cotton.
- Published
- 2020
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