文献类型： 外文期刊

作者： Zhao, Y ¹ ; Liu, QZ ² ; Davis, RE ² ;

作者机构： 1.ARS, Mol Plant Pathol Lab, USDA, Beltsville, MD 20705 USA

2.ARS, Mol Plant Pathol Lab, USDA, Beltsville, MD 20705 USA; Shandong Inst Pomol, Tai An 271000, Peoples R China

关键词： strawberry;AtSUC2-promoter;indirect regeneration;phloem-specific expression

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2004 年 23 卷 4 期

页码：

收录情况： SCI

摘要： Strawberry is susceptible to diseases caused by phytoplasmas, mycoplasma-like prokaryotes restricted to sieve elements in the phloem tissue of infected plants. One strategy to improve strawberry resistance to phytoplasmas involves transgenic expression of anti-microbial peptide genes in phloem. For targeted phloem-specific expression, we constructed a binary vector with an expression cassette bearing the beta-glucuronidase (GUS) reporter gene (uidA) under control of the Arabidopsis sucrose-H+ symporter gene (AtSUC2) promoter. Transgenic strawberry lines were generated with high efficiencies by a modified transformation protocol, which combines the adoption of a 3-day pre-selection period following transformation, and the addition of 10-muM thidiazuron to the regeneration medium. Histological GUS activity indicated that the reporter gene was expressed specifically in phloem of leaves, petioles, and roots of transgenic plants. The results suggest that the transformation protocol and the AtSUC2 promoter may be useful for engineering phytoplasma-resistant transgenic strawberries.