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ACTA HORTICULTURAE SINICA ›› 2008, Vol. 35 ›› Issue (4): 487-492.

• 果树 • Previous Articles     Next Articles

Transgene Expression in Pear (Pyrus communis L.) Driven by Phloem-specific Promoter AtSUC2

SUN Qing-rong1* , SUN Hong-yan1 , ZHAO Yan2, HAMMOND Rosemarie2, and DAVIS Robert E.2   

  1. (1Shandong Institute of Pomology, Tai'an, Shandong 271000, China; 2Molecular Plant Pathology Laboratory, USDA-Agriculture Research Service, Beltsville, MD 20705, U.S.A.)
  • Received:2007-12-27 Revised:1900-01-01 Online:2008-04-25 Published:2008-04-25
  • Contact: SUN Qing-rong

Abstract:

Leaves of 'Old Home' Pear (Pyrus communis L.) in vitro were selected as explants. GUS (β-glucuronidase) reporter gene (uidA) under the control of the Arabidopsis sucrose-H+ symporter gene (AtSUC2) promoter which is phloem-specific was introduced into 'Old Home' by Agrobacterium tumefaciens. Optimal conditions were established for efficient transformation from leaf explants of a pear cultivar, 'Old Home'. High transformation efficiency was achieved by an improved induction stage following initial Agrobacterium infection. In the induction stage, Agrobacterium cells and parent leaf explants were co-cultivated on a liquid induction medium, which yielded a five-fold increase of transformation frequency over conventional co-cultivation on a solid medium. The integration was checked by PCR and Southern hybridization. The expression of uidA gene was analyzed by GUS histochemical detection and Western blot analysis.

Key words: pear, promoter, phloem-specific expression, transgene

CLC Number: