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Article Abstract
Background: Cultivated peanut ( L.) is a major oil and economic crop. Pod size is one of the important agronomic traits of peanut variety, with a direct impact on peanut yield.
Methods: In a previous study, was identified by map-based cloning technology as a candidate gene that regulates peanut pod size.
Results: Overexpression of in transgenic significantly increased plant height, branch number, leaf size, silique size, seed size, and thousand-seed weight. Further examination revealed an increase in the area of silique exocarp cells, and the number and area of endocarp lignified cells. A total of 337 differentially expressed genes, including () , (), and (), were identified by transcriptome analysis of transgenic silique. was found to be expressed explicitly in seeds, and the expression activity of was significantly greater than that of . Exogenous ABA (abscisic acid) and IAA (indole acetic acid) treatment of -transformed tobacco leaves revealed that the promoter was hormone-responsive.
Conclusions: This study sheds light on the function of in regulating plant growth and development. Moreover, characterization of the promoter provides a valuable genetic resource for enhancing peanut yield.
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