Hypothesis of durable resistance in sunflower plants against Plasmopara halstedii |
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| Authors: | Nachaat Sakr |
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| Institution: | 1. Department of Agriculture , Syrian Atomic Energy Commission , Damascus , P.O. Box 6091 , Syria snachaat@hotmail.com snachaat@gmail.com |
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| Abstract: | Sunflower downy mildew is considered as one of the most serious diseases. Therefore, vertical resistance has been used intensively, but with the appearance of many races since 2000, research on more durable resistance has been undertaken. In this review, we present new results concerning the evolution of pathogenicity under artificial conditions in order to underline a mixture model assuming durable resistance against Plasmopara halstedii. Examples of host–parasite interactions including the influence of plant mixture against pathogens and durable resistance are presented to integrate in our couple P. halstedii/Helianthus annuus. |
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| Keywords: | aggressiveness horizontal resistance Pl gene super race vertical resistance virulence |
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