High temperature effects on hypersensitive resistance to Tomato Spotted wilt Tospovirus (TSWV) in pepper (Capsicum chinense Jacq.)

The tomato spotted wilt virus resistance in pepper conferred by the Tsw gene is less stable at 32 °C continuous temperature. Continuous high temperatures for at least nine days lead to systemic spread and necrotic symptoms in plants that are totally resistant at a lower temperature (22 °C). We show...

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Bibliographic Details
Published in:European journal of plant pathology 1998-07, Vol.104 (5), p.489-498
Main Authors: Moury, B. (Unite de Genetique et Amelioration des Fruits et Legumes INRA, Montfavet (France).), Selassie, K.G, Marchoux, G, Daubeze, A.M, Palloix, A
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
CAPSICUM CHINENSE
Cultivars
DISEASE RESISTANCE
Fundamental and applied biological sciences. Psychology
GENETIC RESISTANCE
Genetics and breeding of economic plants
High temperature
HYPERSENSITIVITY
Life Sciences
Low temperature
Other
Pest resistance
Phytopathology and phytopharmacy
Plant pathogens
REACCIONES ALERGICAS
REACTION ALLERGIQUE
RESISTANCE AUX MALADIES
RESISTANCE GENETIQUE
RESISTENCIA A LA ENFERMEDAD
RESISTENCIA GENETICA
Seedlings
TEMPERATURA
TEMPERATURE
Temperature effects
TOMATO SPOTTED WILT VIRUS
Tomatoes
Varietal selection. Specialized plant breeding, plant breeding aims
Vegetal Biology
VIRUS DEL BRONCEADO DEL TOMATE
VIRUS MALADIE BRONZEE TOMATE
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Summary:The tomato spotted wilt virus resistance in pepper conferred by the Tsw gene is less stable at 32 °C continuous temperature. Continuous high temperatures for at least nine days lead to systemic spread and necrotic symptoms in plants that are totally resistant at a lower temperature (22 °C). We show that continuous high temperatures destabilize this resistance in young plants, but older inoculated plants rarely develop systemic symptoms. Populations segregating for the Tsw gene showed that heterozygosity at the Tsw locus increased the chance of inoculated seedlings to develop systemic necrotic symptoms. Genetic background was less significantly involved in the thermosensitivity of the resistant response. As a consequence, it would be preferable to grow cultivars homozygous at the Tsw locus in high temperature conditions.[PUBLICATION ABSTRACT]
ISSN:0929-1873
1573-8469
DOI:10.1023/A:1008618022144