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Expression of the Cercosporin Transporter, CFP, in Tobacco reduces Frog-eye Lesion Size

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Abstract

The cercosporin Major Facilitator Superfamily (MFS) transporter, CFP, under the control of the CaMV 35S promoter, was introduced into the Xanthi cultivar of tobacco by Agrobacterium-mediated transformation. CFP+ transgenic plants were physically indistinguishable from non-transgenic Xanthi and progressed normally through growth to seed set. Accumulation of CFP in the leaf membrane fraction of CFP+ transgenic plants was associated with decreased cercosporin phytotoxicity. Frog-eye leaf lesions on CFP+ transgenic plants infected with Cercospora nicotianae conidia were smaller but were similar in number to those on non-transgenic plants. We conclude that transgenic expression of CFP may have relevance for a disease control strategy in Cercospora-plant pathosystems where cercosporin is implicated in pathogen virulence.

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Abbreviations

ABC:

adenosine triphosphate binding cassette transporter

CaMV:

35S cauliflower mosaic virus 35S promoter

CFP:

cercosporin facilitator protein

FAD:

flavin adenine dinucleotide

GUS:

β-glucuronidase gene

MF:

major facilitator

MFS:

major facilitator superfamily

NT:

non transgenic plant

PCR:

polymerase chain reaction

PDX:

pyridoxine

PR:

pathogenicity related

R 0 :

original plant transformants

R 1 :

first generation plants resulting from selfing

T11, T17, T24, T25:

CFP R1 transgenic plants 11, 17, 24, 25

UV:

ultraviolet

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Upchurch, R.G., Rose, M.S., Eweida, M. et al. Expression of the Cercosporin Transporter, CFP, in Tobacco reduces Frog-eye Lesion Size. Biotechnol Lett 27, 1543–1550 (2005). https://doi.org/10.1007/s10529-005-1780-3

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  • DOI: https://doi.org/10.1007/s10529-005-1780-3

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