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- W3134057771 abstract "Abstract Background Cotton fiber is a model system for studying plant cell development. At present, the functions of many transcription factors in cotton fiber development have been elucidated, however, the roles of auxin response factor (ARF) genes in cotton fiber development need be further explored. Results Here, we identify auxin response factor (ARF) genes in three cotton species: the tetraploid upland cotton G. hirsutum , which has 73 ARF genes, and its putative extent parental diploids G. arboreum and G. raimondii , which have 36 and 35 ARFs, respectively. Ka and Ks analyses revealed that in G. hirsutum ARF genes have undergone asymmetric evolution in the two subgenomes. The cotton ARFs can be classified into four phylogenetic clades and are actively expressed in young tissues. We demonstrate that GhARF2b , a homolog of the Arabidopsis AtARF2 , was preferentially expressed in developing ovules and fibers. Overexpression of GhARF2b by a fiber specific promoter inhibited fiber cell elongation but promoted initiation and, conversely, its downregulation by RNAi resulted in fewer but longer fiber. We show that GhARF2b directly interacts with GhHOX3 and represses the transcriptional activity of GhHOX3 on target genes. Conclusion Our results uncover an important role of the ARF factor in modulating cotton fiber development at the early stage." @default.
- W3134057771 created "2021-03-15" @default.
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- W3134057771 date "2021-03-22" @default.
- W3134057771 modified "2023-10-16" @default.
- W3134057771 title "Characterization of cotton ARF factors and the role of GhARF2b in fiber development" @default.
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- W3134057771 doi "https://doi.org/10.1186/s12864-021-07504-6" @default.
- W3134057771 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7986310" @default.
- W3134057771 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33752589" @default.
- W3134057771 hasPublicationYear "2021" @default.
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