Genetic transformation of Tomato with three pathogenesis-related protein genes for increased resistance to Fusarium oxysporum f.sp. lycopersici

Dolatabadi, Behnaz; Ranjbar, Gholamali; Tohidfar, Masoud; Dehestani, Ali

doi:10.22058/jpmb.2014.8424

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	Genetic transformation of Tomato with three pathogenesis-related protein genes for increased resistance to Fusarium oxysporum f.sp. lycopersici
Article 1, Volume 2, Issue 1, Spring and Summer 2014, Page 1-11 PDF (997 K)
Document Type: Research Paper
DOI: 10.22058/jpmb.2014.8424
Authors
Behnaz Dolatabadi¹; Gholamali Ranjbar¹; Masoud Tohidfar²; Ali Dehestani³
¹Department of Agronomy and Plant Breeding, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran.
²Agricultural Biotechnology Research Institute of Iran, Karaj, Iran.
³Genetics and Agricultural Biotechnology Institute of Tabarestan, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran.
Abstract
Fusarium wilt caused by Fusarium oxysporum f.sp. Lycopersici is one of the major obstacles to the production of tomato which causes huge losses in tomato products worldwide. In order to increase the tolerance to this disease, a triple structure containing PR1, chitinase and glucanase genes controlled by 35S promoter was transferred to tomato. Eight days after planting on pre-culture medium, explants were inoculated by Agrobacterium tumefaciens strain LBA4404 containing the aforementioned plasmid. When the regenerated shoots grew to 2-3 cm, they were cut and transferred to rooting medium.The plantlets were then transferred to pots filled with a soil mixture of peat moss and perlite for further acclimatization. The putative transgenic plant lines were analyzed by multiplex PCR and the transcription of the transgenes was confirmed by RT-PCR method using the specific primers. The estimated value for the frequency of the simultaneous transfer of chitinase, glucanase and PR1 genes to tomato was 2.7%. Protein extracts of transgenic plants expressing chitinase, glucanase and PR1 genes inhibited in vitro hyphal growth of F. oxysporum f.sp. lycopersici. Compared with non-transgenic control plants, despite some alterations in chlorophyll content no other morphological changes were observed in transgenic plants. The total content of chlorophyll “a” and “b” in transgenic plants were 31.8 and 36.2 % higher than that of control plants, respectively, which may be attributed to metabolic changes due to simultaneous expression of three transgenes.
Keywords
Chitinase; Fusarium oxysporum; glucanase; PR1; Transgenic Tomato
Main Subjects
Molecular biology and (trans) gene expression technology in plant breeding

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