Expression of Human Lactoferrin cDNA Confers Resistance to Ralstonia solanacearum in Transgenic Tobacco Plants | Zendy

Zhanyuan Zhang | Zendy; Dermot P. Coyne | Zendy; Anne K. Vidaver | Zendy; Amitava Mitra | Zendy

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Expression of Human Lactoferrin cDNA Confers Resistance to Ralstonia solanacearum in Transgenic Tobacco Plants

Author(s) -

Zhanyuan Zhang,

Dermot P. Coyne,

Anne K. Vidaver,

Amitava Mitra

Publication year - 1998

Publication title -

phytopathology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.264

H-Index - 131

eISSN - 1943-7684

pISSN - 0031-949X

DOI - 10.1094/phyto.1998.88.7.730

Subject(s) - ralstonia solanacearum , biology , lactoferrin , bacterial wilt , nicotiana tabacum , complementary dna , transgene , genetically modified crops , microbiology and biotechnology , gene , plant disease resistance , agrobacterium , pathogen , genetics

ABSTRACT A construct containing a human lactoferrin cDNA was used to transform tobacco (Nicotiana tabacum) using an Agrobacterium-mediated DNA-transfer system to express this human protein in transgenic plants. Transformants were analyzed by Southern, Northern, and Western blots to determine integration of the cDNA into the plant genome and lactoferrin gene expression levels. Most transgenic plants demonstrated significant delays of bacterial wilt symptoms when inoculated with the bacterial pathogen Ralstonia solanacearum. Quantification of the expressed lactoferrin protein by enzyme-linked immunosorbent assay in transgenic plants indicated a significant positive relationship between lactoferrin gene expression levels and levels of disease resistance. Incorporation of the lactoferrin gene into crop plants may enhance resistance to other phytopathogenic bacteria as well.

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