Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (5): 60-68. doi: 10.7668/hbnxb.20193992

Special Issue: Cotton Biotechnology

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Cloning and Functional Analysis of GhFUL1 Gene and Its Promoter in Cotton

ZHANG Xiaohong1, XU Peiyang1, YAN Xu1, ZHANG Beibei1, YU Chanchan2   

  1. 1 College of Agronomy,Henan Institute of Science and Technology,Henan Collaborative Innovation Center of Modern Biological Breeding,Xinxiang 453003,China
    2 Advanced Research Institute of Multidisciplinary Sciences,Beijing Institute of Technology,Beijing 100081,China
  • Received:2023-05-01 Published:2023-10-28

Abstract:

To investigate the function of GhFUL1 gene in branching development of cotton,the GhFUL1 gene in the MADS-box family and its promoter were cloned from cotton,and the function and promoter activity of the gene were analyzed.The results indicated that the open reading frame (ORF) of GhFUL1 gene was 726 bp and encoded 241 amino acids.Phylogenetic tree analysis showed that the amino acid sequence of FUL subclade was conserved,and GhFUL1 owned the highest similarity to Cacao TcAGL8-1 except for the homologous proteins in cotton.Subcellular localization result showed that GhFUL1 was localized in nucleus and membrane.The expression level of different cotton tissues was examined,and the result showed that GhFUL1 was highly expressed in shoot apical meristem.Overexpressing GhFUL1 in Arabidopsis thaliana increased the number of lateral branches by decreasing the expression of cytokinin oxidation/dehydrogenase genes AtCTK1 and AtCTK6.Compared with the wild type,transgenic plants did not result in significant changes of the flowering time and floral organ development.The present results suggested that GhFUL1 might affect the number of branches by regulating the cytokinin synthesis pathway.The promoter of GhFUL1 was predicted to include the TATA-box and CAAT-box elements,and cis-acting elements related to light response,auxin response and stress response by PlantCARE website.Then the promoter of GhFUL1 was cloned and constructed into expression vector pBI121 to detect promoter activity.The GUS staining of transgenic Arabidopsis lines showed that GhFUL1 promoter was specifically expressed in shoot apical meristem at seedling stage and flower organ at maturity.This study revealed that the gene and promoter of GhFUL1 played an important role in the Arabidopsis branching development process after transformation.

Key words: Cotton, GhFUL1, Subcellular localization, Function analysis, Promoter activity, GUS staining

Cite this article

ZHANG Xiaohong, XU Peiyang, YAN Xu, ZHANG Beibei, YU Chanchan. Cloning and Functional Analysis of GhFUL1 Gene and Its Promoter in Cotton[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(5): 60-68. doi: 10.7668/hbnxb.20193992.

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