ArticleBMC genomics2024
Characterization and expression analysis of the B3 gene family during seed development in Akebia trifoliata.
Article in BMC genomics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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5 authors.
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Abstract
backgroundB3 genes encode transcription factors that play key roles in plant growth and development. However, the specific B3 genes involved in the seed development of Akebia trifoliata remain unexplored.
resultsA total of 72 AktB3 genes were identified and classified into five subfamilies (ARF, LAV, RAV, HSI, and REM) based on phylogenetic analysis. These 72 AktB3 genes were unevenly distributed across 16 chromosomes. Collinear analysis indicated that segmental duplication has played a significant role in the evolution of AktB3 genes, and underwent purification selection. Expression profiling across seed development stages revealed that seven AktB3 genes, particularly from the LAV subfamily (AktABI3, AktFUS3, AktLEC2), were up-regulated at 70 days after flowering (DAF). Notably, the expression of oleosin exhibited a strong positive correlation with LAV subfamily genes, highlighting their potential roles as hub genes in lipid metabolism and seed development. Yeast two-hybrid (Y2H) and yeast one-hybrid (Y1H) experiments confirmed that AktFUS3-1, AktFUS3-2, and AktLEC2 form protein complexes and individually bind to the AktOLE1 promoter, thereby regulating downstream gene expression. These results provide direct evidence of the cooperative role these transcription factors play in controlling lipid metabolism, particularly related to oleosin proteins. Additionally, miRNA sequencing across three seed developmental stages identified 591 miRNAs and 1,673 target gene pairs. A total of 23 AktB3 genes were predicted to be targets of 20 miRNAs, with 11 miRNAs specifically targeting the ARF subfamily genes. Particularly, miR160-x, miR160-z, and miR167-z were predicted to target ARF subfamily genes, potentially influencing seed development. Moreover, the miRNA-B3 regulatory modules, especially involving ARF genes and miR160/167, require further study to clarify their roles in seed development.
conclusionsThese findings contribute valuable resources for future functional studies of the molecular regulatory networks governing seed development in A. trifoliata.
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