A detached-leaf method to evaluate late blight resistance in potato and tomato View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1997-09

AUTHORS

R. W. Goth, J. Keane

ABSTRACT

We developed a detached leaf method for evaluating potato (Solanum tuberosum L.) and tomato (Lycopersicon esculentum Mill.) germplasm for reactions toPhytophthora infestans, the causal organism of late blight. Primary leaves from the third to the sixth node of potato plants, and the fourth to sixth node of tomato plants were excised at the stem. Their petioles were inserted into 14 mm × 100 mm floral aqua tubes containing 9 ml of sterilized distilled water. The leaves in the aqua tubes were placed with abaxial sides down on galvanized metal hardware cloth (12.5 × 12.5 mm mesh). A 12.5 mm sensi-disc containing 50μl of 2 × 104 zoospores was placed in the centers of the terminal leaflet and the second leaflet pair of the potato leaf. A single disc was placed on the center of the tomato leaf. The supporting hardware cloth was placed 2.5 cm above distilled water (2.5 cm deep) in 31 cm × 17 cm × 8 cm clear plastic boxes with tight fitting lids. Leaves on intact tomato and potato plants were inoculated in a similar manner and placed in a mist chamber. Lesion growth was determined 4, 5, and 6 days following inoculation. There were no significant differences in reactions to isolates ofP. infestans on detached and intact leaves of potato cultivars Green Mountain and Kennebec and the tomato cultivar Bonnie Best. More... »

PAGES

347-352

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02851579

DOI

http://dx.doi.org/10.1007/bf02851579

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1016514773


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