Quantitative Inoculations of Poplars with Melampsora Larici-populina
Identifieur interne : 001270 ( Main/Exploration ); précédent : 001269; suivant : 001271Quantitative Inoculations of Poplars with Melampsora Larici-populina
Auteurs : M. H. Pei [Royaume-Uni] ; C. Ruiz [Royaume-Uni] ; J. Harris [Royaume-Uni] ; T. Hunter [Royaume-Uni]Source :
- European Journal of Plant Pathology [ 0929-1873 ] ; 2003.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Logiciel.
English descriptors
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Abstract
Abstract: Four poplar clones were inoculated with four isolates of Melampsora larici-populina at seven spore concentrations (inoculum densities up to 680 spores cm−2 using a leaf-disc method. Disease reactions were recorded using a digital camera. The number and size of uredinia were examined using image analysis software and the number of spores produced per leaf disc was counted. The infection efficiency was estimated in a range of 0.008–0.167 and the pustule diameter measured 0.75–0.94 mm. Rust resistance/susceptibility was expressed by the differences in both the number and the size of uredinia. Within a clone/isolate combination, pustule diameter and the number of spores produced per pustule did not differ significantly between different levels of inoculum density. There was a close correlation between the pustule area and spore yield. When Spearman rank correlation was tested between the disease variables, a close correlation was found between pustule number and pustule area per leaf disc (0.98) and between the number of spores produced and the pustule area/number per leaf disc (0.94 and 0.92, respectively). There was significant correlation between the number and the diameter of pustules (0.54, P < 0.001).
Url:
DOI: 10.1023/A:1022822503139
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Disease reactions were recorded using a digital camera. The number and size of uredinia were examined using image analysis software and the number of spores produced per leaf disc was counted. The infection efficiency was estimated in a range of 0.008–0.167 and the pustule diameter measured 0.75–0.94 mm. Rust resistance/susceptibility was expressed by the differences in both the number and the size of uredinia. Within a clone/isolate combination, pustule diameter and the number of spores produced per pustule did not differ significantly between different levels of inoculum density. There was a close correlation between the pustule area and spore yield. When Spearman rank correlation was tested between the disease variables, a close correlation was found between pustule number and pustule area per leaf disc (0.98) and between the number of spores produced and the pustule area/number per leaf disc (0.94 and 0.92, respectively). There was significant correlation between the number and the diameter of pustules (0.54, P < 0.001).</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Pei, M H" sort="Pei, M H" uniqKey="Pei M" first="M. H." last="Pei">M. H. Pei</name></noRegion><name sortKey="Harris, J" sort="Harris, J" uniqKey="Harris J" first="J." last="Harris">J. Harris</name><name sortKey="Hunter, T" sort="Hunter, T" uniqKey="Hunter T" first="T." last="Hunter">T. Hunter</name><name sortKey="Pei, M H" sort="Pei, M H" uniqKey="Pei M" first="M. H." last="Pei">M. H. Pei</name><name sortKey="Ruiz, C" sort="Ruiz, C" uniqKey="Ruiz C" first="C." last="Ruiz">C. Ruiz</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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