Systematic Analysis of Gibberellin Pathway Components in Medicago truncatula Reveals the Potential Application of Gibberellin in Biomass Improvement

Gibberellins (GAs), a class of phytohormones, act as an essential natural regulator of plant growth and development. Many studies have shown that GA is related to rhizobial infection and nodule organogenesis in legume species. However, thus far, GA metabolism and signaling components are largely unk...

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Published in:International journal of molecular sciences 2020-10, Vol.21 (19), p.7180
Main Authors: Wang, Hongfeng, Jiang, Hongjiao, Xu, Yiteng, Wang, Yan, Zhu, Lin, Yu, Xiaolin, Kong, Fanjiang, Zhou, Chuanen, Han, Lu
Format: Article
Language:English
Subjects:
Beans
Biomass
Biosynthesis
Chromosomes
Dwarfism
Ectopic expression
expression analysis
forage improvement
Gene expression
Gene Expression Regulation, Plant
Gene regulation
Genes
Genetic aspects
Genomes
Genotype & phenotype
Gibberellins
Gibberellins - metabolism
Legumes
Medicago truncatula
Medicago truncatula - genetics
Medicago truncatula - growth & development
Medicago truncatula - metabolism
Metabolic Networks and Pathways - genetics
Metabolism
Mimosaceae
Mutation
Nodules
Observations
Organogenesis
Phylogenetics
Plant Development - genetics
Plant Growth Regulators - genetics
Plant Growth Regulators - metabolism
Plant Proteins
Proteins
Rhizobium - genetics
Rhizobium - growth & development
Root Nodules, Plant - genetics
Root Nodules, Plant - growth & development
Signal transduction
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Summary:Gibberellins (GAs), a class of phytohormones, act as an essential natural regulator of plant growth and development. Many studies have shown that GA is related to rhizobial infection and nodule organogenesis in legume species. However, thus far, GA metabolism and signaling components are largely unknown in the model legume . In this study, a genome-wide analysis of GA metabolism and signaling genes was carried out. In total 29 components, including 8 genes, 2 genes, 13 genes, 3 genes, and 3 genes were identified in genome. Expression profiles revealed that most members of , , and showed tissue-specific expression patterns. In addition, the GA biosynthesis and deactivation genes displayed a feedback regulation on GA treatment, respectively. Yeast two-hybrid assays showed that all the three MtGID1s interacted with MtDELLA1 and MtDELLA2, suggesting that the MtGID1s are functional GA receptors. More importantly, exhibited increased plant height and biomass by ectopic expression of the , suggesting that enhanced GA response has the potential for forage improvement.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms21197180