title: Cotton GASL genes encoding putative gibberellin-regulated proteins are involved in response to GA signaling in fiber development.
abstract: GAST (GA-stimulated transcript)-like genes have been reported as targets of GA regulation in some plant species. In this study, we isolated seven GAST-like cDNAs from cotton (Gossypium hirsutum) cDNA libraries (designated as GhGASL1-GhGASL7). Meanwhile, the genomic DNA clones corresponding to the seven GhGASL genes were isolated by using PCR amplification technique. Analysis of gene structure revealed that four genes (GhGASL1/3/5/6) contain two exons and one intron, while the rest have four exons and three introns. All of the deduced GhGASL proteins contain a putative signal peptide in the N-terminus and a conservative cysteine-rich C-terminal domain. Quantitative RT-PCR analysis indicated that the seven GhGASL genes are differentially expressed in cotton tissues. Among them, GhGASL1/4/7 were predominantly expressed in cotyledons, while the transcripts of GhGASL2/5 were preferentially accumulated at hypocotyls. GhGASL3 mRNA was largely accumulated in fibers, while GhGASL6 transcripts were mainly detected in ovules. Furthermore, GhGASL2/3/5 displayed a relatively high expression levels during early fiber elongation stages, and were regulated by GA. These data suggested that GhGASL genes may be involved in fiber elongation and in response to GA signaling during fiber development.
authors: Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Central China Normal University, Wuhan, 430079, China.
authors: Zhi-Hao
authors: ZH
authors: Liu
authors: Li
authors: L
authors: Zhu
authors: Hai-Yan
authors: HY
authors: Shi
authors: Yun
authors: Y
authors: Chen
authors: Jian-Min
authors: JM
authors: Zhang
authors: Yong
authors: Y
authors: Zheng
authors: Xue-Bao
authors: XB
authors: Li
mesh_terms: D000595:Amino Acid Sequence; D003001:Cloning, Molecular; D032561:Cotton Fiber; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D023061:Gene Order; D005875:Gibberellins / Q000378:metabolism* / Q000494:pharmacology; D003368:Gossypium / Q000235:genetics* / Q000378:metabolism*; D008969:Molecular Sequence Data; D009928:Organ Specificity / Q000235:genetics; D056771:Ovule / Q000235:genetics / Q000378:metabolism; D010802:Phylogeny; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D020033:Protein Isoforms; D016415:Sequence Alignment; D015398:Signal Transduction; D059467:Transcriptome
chemical_list: D018076:DNA, Complementary; D005875:Gibberellins; D010940:Plant Proteins; D020033:Protein Isoforms
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