Leaf phenolics of three willow clones differing in resistance to Melampsora rust infection
Identifieur interne : 001532 ( Main/Exploration ); précédent : 001531; suivant : 001533Leaf phenolics of three willow clones differing in resistance to Melampsora rust infection
Auteurs : Johanna Hakulinen [Finlande] ; Sanja Sorjonen [Finlande] ; Riitta Julkunen-Tiitto [Finlande]Source :
- Physiologia Plantarum [ 0031-9317 ] ; 1999-04.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Leaf phenolic composition in three Salix myrsinifolia Salisb. clones (V8, V45, and V43), inoculated with Melampsora rust, was analyzed to detect local rust‐induced alterations during different stages of infection (2, 7, and 21 days after inoculation [DAI]). Phenolic levels and percentage of uredial area varied significantly between clones. In the most resistant clone,V8, the levels of some phenolic compounds were lower in rust‐infected plants than in control plants at the initial stages of rust infection, suggesting a rapid response of phenolic metabolism to rust attack. Moreover, the clone V8 contained the highest constitutive (+)‐catechin level. In clone V45, rust infection caused the most pronounced increase in the levels of individual phenolics at 7 DAI. This increase may have been effective in retarding the subsequent spread and development of rust. In the most susceptible clone V43, rust‐induced phenolic responses were less pronounced and delayed. The results suggest that in specific willow‐rust interactions, constitutive levels of phenolics, as well as induced phenolic responses, may contribute to the expression of rust resistance. In general, rust‐induced alterations in willow phenolic levels are highly specific to genotype and compound and vary depending on the stage of rust development.
Url:
DOI: 10.1034/j.1399-3054.1999.105410.x
Affiliations:
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unit="page-count">8</biblScope><publisher>Munksgaard International Publishers</publisher><pubPlace>Copenhagen</pubPlace><date type="published" when="1999-04">1999-04</date></imprint><idno type="ISSN">0031-9317</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0031-9317</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical composition</term><term>Clone</term><term>Disease resistance</term><term>Genetic variability</term><term>Host agent relation</term><term>Intraspecific comparison</term><term>Melampsora</term><term>Phenols</term><term>Plant leaf</term><term>Sensitivity resistance</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Clone</term><term>Comparaison intraspécifique</term><term>Composition chimique</term><term>Feuille végétal</term><term>Melampsora</term><term>Phénols</term><term>Relation hôte agent</term><term>Résistance aux maladies</term><term>Salix myrsinifolia</term><term>Sensibilité résistance</term><term>Variabilité génétique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Leaf phenolic composition in three Salix myrsinifolia Salisb. clones (V8, V45, and V43), inoculated with Melampsora rust, was analyzed to detect local rust‐induced alterations during different stages of infection (2, 7, and 21 days after inoculation [DAI]). Phenolic levels and percentage of uredial area varied significantly between clones. In the most resistant clone,V8, the levels of some phenolic compounds were lower in rust‐infected plants than in control plants at the initial stages of rust infection, suggesting a rapid response of phenolic metabolism to rust attack. Moreover, the clone V8 contained the highest constitutive (+)‐catechin level. In clone V45, rust infection caused the most pronounced increase in the levels of individual phenolics at 7 DAI. This increase may have been effective in retarding the subsequent spread and development of rust. In the most susceptible clone V43, rust‐induced phenolic responses were less pronounced and delayed. The results suggest that in specific willow‐rust interactions, constitutive levels of phenolics, as well as induced phenolic responses, may contribute to the expression of rust resistance. In general, rust‐induced alterations in willow phenolic levels are highly specific to genotype and compound and vary depending on the stage of rust development.</div></front></TEI><affiliations><list><country><li>Finlande</li></country></list><tree><country name="Finlande"><noRegion><name sortKey="Hakulinen, Johanna" sort="Hakulinen, Johanna" uniqKey="Hakulinen J" first="Johanna" last="Hakulinen">Johanna Hakulinen</name></noRegion><name sortKey="Julkunen Iitto, Riitta" sort="Julkunen Iitto, Riitta" uniqKey="Julkunen Iitto R" first="Riitta" last="Julkunen-Tiitto">Riitta Julkunen-Tiitto</name><name sortKey="Sorjonen, Sanja" sort="Sorjonen, Sanja" uniqKey="Sorjonen S" first="Sanja" last="Sorjonen">Sanja Sorjonen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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