Free access
Issue
Agronomie
Volume 15, Number 1, 1995
Page(s) 25 - 29
DOI http://dx.doi.org/10.1051/agro:19950103
Agronomie 15 (1995) 25-29
DOI: 10.1051/agro:19950103

Resistance of Aegilops, maize and wheat genotypes to Pseudomonas syringae pathovars atrofaciens and syringae

V. Vassilev, K. Kolev, M. Zaharieva and V. Sevov

K Malkoff Institute for Plant Genetic Resources, 4122 Sadovo-Plovdiv, Bulgaria

Abstract - The resistance of cereal genotypes to the artificial inoculation of Pseudomonas syringae pathovars atrofaciens (PSA) and syringae (PSS) at third leaf growth stage of development was investigated. The methods of pricking and injecting were used. The injection method produced symptoms similar to natural infection, at level of inoculum at least 107 cfu/ml. At this stage of cereal growth there was a high level of resistance to PSA and PSS. None of the Aegilops species showed the symptoms of susceptible genotypes. Only one Triticum genotype was susceptible to strains V28 and Y4895 of PSA and PSS, respectively, at the highest level of inoculum. The leaves of all Zea mays genotypes were susceptible to PSS A106 at 109 cfu/ml.


Résumé - Résistance des génotypes d'Aegilops, de maïs et de blé à Pseudomonas syringae pathovars (pvs) atrofaciens (PSA) et syringae (PSS). La résistance au PSA et au PSS des génotypes des céréales a été étudiée après inoculation par les méthodes de scarification et d'injection. La dernière méthode permet d'obtenir des symptômes de maladie similaires à ceux obtenus dans la nature au niveau d'inoculum de 107 cfu/ml et plus. Les plantules au stade 3 feuilles ont montré un niveau élevé de résistance à PSA et PSS. Aucune espèce d'Aegilops n'a montré d'infection comme chez les génotypes sensibles. Un seul génotype de Triticum est sensible au plus haut niveau d'inoculation par PSA V28 et PSS Y4895. Les feuilles de tous les génotypes de maïs sont sensibles au PSS A 106 à la concentration de 109 cfu/ml.


Key words: cereals / resistance / Pseudomonas syringae / atrofaciens / syringae

Mots clés : céréales / résistance / Pseudomonas syringae / pathovars atrofaciens / syringae

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