Molecular Cloning and Expression Analysis of a MADS-Box Gene (<i>GbMADS2</i>) from <i>Ginkgo biloba

  • Xiaohui WANG College of Horticulture and Gardening, Yangtze University, Jingzhou, 434023
  • Junhuan CHENG College of Horticulture and Gardening, Yangtze University, Jingzhou, 434023
  • Feng XU College of Horticulture and Gardening, Yangtze University, Jingzhou, 434023
  • Xingxiang LI Medical School, Yangtze University, Jingzhou, 434023
  • Weiwei ZHANG College of Horticulture and Gardening, Yangtze University, Jingzhou, 434023
  • Yongling LIAO College of Forestry, Nanjing Forest University, Nanjing, 210037
  • Shuiyuan CHENG Wuhan Polytechnic University, Wuhan 430023
  • Xianbin LI Jingzhou Soil and Fertilizer Station, Jingzhou 434025

Abstract

As a kind of transcription factors gene family, MADS-box genes play an important role in plant development processes. To find genes involved in the floral transition of Ginkgo biloba, a MADS-box gene, designated as GbMADS2, was cloned from G. biloba based on EST sequences by RT-PCR. Sequence analysis results showed that the cDNA sequence of GbMADS2 contained a 663 bp length ORF encoding 221 amino acids protein, which displayed typical structure of plant MADS-box protein including MADS, I, and K domains and C terminus. The sequence of GbMADS2 protein was highly homologous to those of MADS-box proteins from other plant species with the highest homologous to AGAMOUS (CyAG) from Cycas revoluta. The phylogenetic tree analysis revealed that GbMADS2 belonged to AGAMOUS clade genes. Real-time PCR analysis indicated that expression levels of GbMADS2 gene in female and male flower were significantly higher than those in root, stem, and leaves, and that GbMADS2 expression level increased along with time of flower development. The spatial and time-course expression profile of GbMADS2 implied that GbMADS2 might be involved in development of reproductive organs. The isolation and expression analysis of GbMADS2 provided basis for further studying the molecular mechanism of flower development in G. biloba.

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Published
2015-05-17
How to Cite
WANG, X., CHENG, J., XU, F., LI, X., ZHANG, W., LIAO, Y., CHENG, S., & LI, X. (2015). Molecular Cloning and Expression Analysis of a MADS-Box Gene (<i>GbMADS2</i>) from <i&gt;Ginkgo biloba. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 43(1), 19-24. https://doi.org/10.15835/nbha4319760
Section
Research Articles