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HEREDITAS ›› 2009, Vol. 31 ›› Issue (6): 663-667.doi: 10.3724/SP.J.1005.2009.00663

• 研究报告 • Previous Articles     Next Articles

Fruit-specific expression of sweet protein Brazzein in transgenic tomato plants

YIN Tao1;LU Hong-Yu2;ZHANG Shang-Long1;LIU Jing-Mei3;CHEN Da-Ming1, 4   

  1. 1. Department of Horticulture, Zhejiang University, Hangzhou 310029, China;
    2. College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China;
    3. Beijing Vegetable Research Center, Beijing 100089, China;
    4. Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, USA
  • Received:2008-11-27 Revised:2008-12-21 Online:2009-06-10 Published:2009-06-10
  • Contact: ZHANG Shang-Long

Abstract: The AGPL1 (ADP-glucose pyrophosphorylase large subunit 1) promoter from watermelon (Citrullus vulgaris S.) has proved to exhibit fruit-specific expression patterns in tomato (Lycopersicon esculentum L.). A plant expression vec-tor harboring sweet-taste protein, Brazzein, directed by AGPL1 promoter, was constructed and transferred into tomato plants through Agrobacterium-mediated transform methods. Histochemical staining assay, PCR screening, Southern blotting analysis and RT-PCR analysis showed that Brazzein gene was successfully integrated into the genome of transgenic tomato plants with stable expression. Sweet-taste fruits were produced under control of fruit-specific AGPL1 promoter, whereas other parameters of fruit quality were largely unchanged.