Year: 2004
Type: dissertation
Abstract: The objective of this study was to analyse the effect of thrips ( F. occidentalis ) resistance in pepper ( Capsicum ) on the spread of Tomato spotted wilt virus (TSWV). Results demonstrate that the rate of primary TSWV-infection is effectively limited in a thrips-resistant (TR) pepper crop compared to a thrips-susceptible (TS) crop, and that this is based on a decreased preference of thrips for TR plants. Secondary TSWV-infections were effectively restricted in the TR pepper crop and this is based on a greatly reduced thrips population built-up.The effect of thrips resistance on the spread of TSWV was also analysed in a virus-resistant genotype. TSWV-resistant plants respond with a hypersensitive reaction after infection with TSWV, resulting in necrotic local lesions on leaves and fruits. Under the same infection pressure, fewer local lesions were found in the thrips-resistant accession PI 152225 than in the thrips-susceptible PI 159236 accession, indicating a synergistic effect of thrips- and virus resistance.Studies presented in the last part of the thesis show mutual benefits for F. occidentalis and TSWV from the attraction to virus-infected plants. Attraction resulted in more offspring on these plants and thereby enhancing the chance for virus transmission. Besides, thrips developed significantly faster on TSWV-infected plants than on non-infected plants. It was demonstrated that volatiles released from TSWV-infected plants may be involved in the attraction of thrips to TSWV-infected plants.
DOI: 10.18174/121538
Author: P.C. Maris
Institution: Wageningen University & Research
Language: English
Topic: Plant Virus Research Studies
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W164639174