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General Information

Document type
  • Peer-reviewed journal article
GE organism
  • papaya
GE trait
  • disease resistance
Country
  • USA

Results

Efficacy
  • positive effect

Differential protection against papaya ringspot virus isolates in coat protein gene transgenic papaya and classically cross-protected papapya Open Access

Tennant, PF; Gonsalves, C; Ling, KS; Fitch, M; Mashardt, R; Slightom, JL; Gonsalves, D
Phytopathology. 1994 August. 84(11):1359-1366

Link to full text (open access, freely available)



Abstract

Transgenic papaya expressing the coat protein gene of the mild papaya ringspot virus strain from Hawaii (PRV HA 5-1) showed high levels of resistance against the severe PRV HA isolate from Hawaii. Inoculation with high concentrations of the virus, multiple mechanical inoculations, or graft inoculations failed to break the resistance of transgenic papaya. Virus recovery assays from these inoculated plants suggested that virus replication and movement were impaired. Transgenic papaya also showed high levels of resistance against severe PRV isolates recently collected from Hawaii. Similarly, PRV HA 5-1 cross-protected papaya offered high levels of protection against two of the three isolates from Hawaii. However, neither transgenic nor mild strain-infected papaya showed good levels of protection against PRV isolates from 11 other geographical regions that were serologically related to PRV HA 5-1. A range of reactions was observed: complete resistance; delay in symptom development and symptom attenuation with PRV isolates from the Bahamas, Florida, and Mexico; and, a shorter delay in symptom development but no symptom attenuation with isolates from Brazil or Thailand.

Keywords

virus; resistance; papaya; infection

Funding

Funding source
  • Cornell Biotechnology Program
  • National Science Foundation
  • USDA
  • Jamaica Agricultural Development Program
Funding country
  • United States
Funding type
  • government
  • NGO: same industry aligned

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Cite this study

MLA

Tennant, PF, C Gonsalves, KS Ling, M Fitch, R Mashardt, JL Slightom, D Gonsalves. "Differential protection against papaya ringspot virus isolates in coat protein gene transgenic papaya and classically cross-protected papapya." Phytopathology 84.11 (1994): 1359-1366. Web. 27 Jul. 2017.

APA

Tennant, PF., Gonsalves, C., Ling, KS., Fitch, M., Mashardt, R., Slightom, JL., & Gonsalves, D. (1994). Differential protection against papaya ringspot virus isolates in coat protein gene transgenic papaya and classically cross-protected papapya. Phytopathology, 84(11), 1359-1366.

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