Preformed expression of defense is a hallmark of partial resistance to rice blast fungal pathogen Magnaporthe oryzae |
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| Authors: | Emilie Vergne Xavier Grand Elsa Ballini Véronique Chalvon P Saindrenan D Tharreau J-L Nottéghem J-B Morel |
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| Affiliation: | 1.INRA, UMR BGPI INRA/CIRAD/SupAgro,Campus International de Baillarguet,France;2.Montpellier SUPAGRO, UMR BGPI INRA/CIRAD/SupAgro,Campus International de Baillarguet,France;3.CNRS-Université Paris-Sud, Institut de Biotechnologie des Plantes,Physiopathologie Moléculaire Végétale,Batiment 630,France;4.CIRAD, UMR BGPI INRA/CIRAD/SupAgro,Campus International de Baillarguet,France |
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| Abstract: | Background Partial resistance to plant pathogens is extensively used in breeding programs since it could contribute to resistance durability. Partial resistance often builds up during plant development and confers quantitative and usually broad-spectrum resistance. However, very little is known on the mechanisms underlying partial resistance. Partial resistance is often explained by poorly effective induction of plant defense systems. By exploring rice natural diversity, we asked whether expression of defense systems before infection could explain partial resistance towards the major fungal pathogen Magnaporthe oryzae. The constitutive expression of 21 defense-related genes belonging to the defense system was monitored in 23 randomly sampled rice cultivars for which partial resistance was measured. |
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