Genome-Wide Transcriptome Analysis Reveals That Upregulated Expression of Aux/IAA Genes Is Associated with Defective Leaf Growth of the slf Mutant in Eggplant

Leaf size is a crucial trait in eggplant breeding, as it influences photosynthesis, plant biomass and management. However, little is known about the molecular mechanism regulating leaf size in eggplant. This study reports a small leaf mutant (slf) generated with the mutagen ethyl methane sulfonate (...

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Published in:Agronomy (Basel) 2022-11, Vol.12 (11), p.2647
Main Authors: Du, Wenchao, Lu, Yang, Luo, Shuangxia, Yu, Ping, Shen, Jiajia, Wang, Xing, Xuan, Shuxin, Wang, Yanhua, Zhao, Jianjun, Li, Na, Chen, Xueping, Shen, Shuxing
Format: Article
Language:English
Subjects:
Aux/IAA
auxinole
Auxins
Cell growth
Cell proliferation
eggplant
Gene expression
Genes
Genomes
Genotype & phenotype
leaf size
Leaves
Mutants
Photosynthesis
Plant biomass
Plant breeding
Population
Proteins
Seeds
Signaling
Solanum melongena
Statistical analysis
transcriptome analysis
Transcriptomes
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Summary:Leaf size is a crucial trait in eggplant breeding, as it influences photosynthesis, plant biomass and management. However, little is known about the molecular mechanism regulating leaf size in eggplant. This study reports a small leaf mutant (slf) generated with the mutagen ethyl methane sulfonate (EMS). The slf mutant showed restricted cell proliferation and an increased content of auxin. Transcriptome analysis revealed that several genes involved in auxin signaling are upregulated in slf. Exogenous application of auxinole, an auxin antagonist of TIR1/AFB receptors, repressed the expression of these genes and restored leaf growth of slf, suggesting that the small leaf size of slf is likely associated with auxin signaling. This study provides essential clues to unveil the molecular mechanism of leaf size regulation in eggplant.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy12112647