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Phosphorus supply, arbuscular mycorrhizal fungal species, and plant genotype impact on the protective efficacy of mycorrhizal inoculation against wheat powdery mildew.
Mycorrhiza. 2016 Oct; 26(7):685-97.M

Abstract

A potential alternative strategy to chemical control of plant diseases could be the stimulation of plant defense by arbuscular mycorrhizal fungi (AMF). In the present study, the influence of three parameters (phosphorus supply, mycorrhizal inoculation, and wheat cultivar) on AMF protective efficiency against Blumeria graminis f. sp. tritici, responsible for powdery mildew, was investigated under controlled conditions. A 5-fold reduction (P/5) in the level of phosphorus supply commonly recommended for wheat in France improved Funneliformis mosseae colonization and promoted protection against B. graminis f. sp. tritici in a more susceptible wheat cultivar. However, a further decrease in P affected plant growth, even under mycorrhizal conditions. Two commercially available AMF inocula (F. mosseae, Solrize®) and one laboratory inoculum (Rhizophagus irregularis) were tested for mycorrhizal development and protection against B. graminis f. sp. tritici of two moderately susceptible and resistant wheat cultivars at P/5. Mycorrhizal levels were the highest with F. mosseae (38 %), followed by R. irregularis (19 %) and Solrize® (SZE, 8 %). On the other hand, the highest protection level against B. graminis f. sp. tritici was obtained with F. mosseae (74 %), followed by SZE (58 %) and R. irregularis (34 %), suggesting that inoculum type rather than mycorrhizal levels determines the protection level of wheat against B. graminis f. sp. tritici. The mycorrhizal protective effect was associated with a reduction in the number of conidia with haustorium and with an accumulation of polyphenolic compounds at B. graminis f. sp. tritici infection sites. Both the moderately susceptible and the most resistant wheat cultivar were protected against B. graminis f. sp. tritici infection by F. mosseae inoculation at P/5, although the underlying mechanisms appear rather different between the two cultivars. This study emphasizes the importance of taking into account the considered parameters when considering the use of AMF as biocontrol agents.

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Authors+Show Affiliations

Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, 50, Rue Ferdinand Buisson, 62228, Calais Cedex, France.

Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, 50, Rue Ferdinand Buisson, 62228, Calais Cedex, France.

Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, 50, Rue Ferdinand Buisson, 62228, Calais Cedex, France.

Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, 50, Rue Ferdinand Buisson, 62228, Calais Cedex, France.

Magnin-Robert M

Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, 50, Rue Ferdinand Buisson, 62228, Calais Cedex, France.

Lounès-Hadj Sahraoui A

Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, 50, Rue Ferdinand Buisson, 62228, Calais Cedex, France. lounes@univ-littoral.fr.

Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale, SFR Condorcet FR CNRS 3417, 50, Rue Ferdinand Buisson, 62228, Calais Cedex, France.

MeSH

Agricultural InoculantsGenotypeMycorrhizaePest Control, BiologicalPhosphorusPlant DiseasesPlant LeavesPlant RootsSeedlingsTriticum

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27130314

Citation

Mustafa, G, et al. "Phosphorus Supply, Arbuscular Mycorrhizal Fungal Species, and Plant Genotype Impact On the Protective Efficacy of Mycorrhizal Inoculation Against Wheat Powdery Mildew." Mycorrhiza, vol. 26, no. 7, 2016, pp. 685-97.

Mustafa G, Randoux B, Tisserant B, et al. Phosphorus supply, arbuscular mycorrhizal fungal species, and plant genotype impact on the protective efficacy of mycorrhizal inoculation against wheat powdery mildew. Mycorrhiza. 2016;26(7):685-97.

Mustafa, G., Randoux, B., Tisserant, B., Fontaine, J., Magnin-Robert, M., Lounès-Hadj Sahraoui, A., & Reignault, P. (2016). Phosphorus supply, arbuscular mycorrhizal fungal species, and plant genotype impact on the protective efficacy of mycorrhizal inoculation against wheat powdery mildew. Mycorrhiza, 26(7), 685-97. https://doi.org/10.1007/s00572-016-0698-z

Mustafa G, et al. Phosphorus Supply, Arbuscular Mycorrhizal Fungal Species, and Plant Genotype Impact On the Protective Efficacy of Mycorrhizal Inoculation Against Wheat Powdery Mildew. Mycorrhiza. 2016;26(7):685-97. PubMed PMID: 27130314.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Phosphorus supply, arbuscular mycorrhizal fungal species, and plant genotype impact on the protective efficacy of mycorrhizal inoculation against wheat powdery mildew. AU - Mustafa,G, AU - Randoux,B, AU - Tisserant,B, AU - Fontaine,J, AU - Magnin-Robert,M, AU - Lounès-Hadj Sahraoui,A, AU - Reignault,Ph, Y1 - 2016/04/29/ PY - 2015/09/01/received PY - 2016/04/06/accepted PY - 2016/5/1/entrez PY - 2016/5/1/pubmed PY - 2017/2/23/medline KW - Arbuscular mycorrhizal fungi KW - Biocontrol KW - Phosphorus KW - Powdery mildew KW - Wheat genotype SP - 685 EP - 97 JF - Mycorrhiza JO - Mycorrhiza VL - 26 IS - 7 N2 - A potential alternative strategy to chemical control of plant diseases could be the stimulation of plant defense by arbuscular mycorrhizal fungi (AMF). In the present study, the influence of three parameters (phosphorus supply, mycorrhizal inoculation, and wheat cultivar) on AMF protective efficiency against Blumeria graminis f. sp. tritici, responsible for powdery mildew, was investigated under controlled conditions. A 5-fold reduction (P/5) in the level of phosphorus supply commonly recommended for wheat in France improved Funneliformis mosseae colonization and promoted protection against B. graminis f. sp. tritici in a more susceptible wheat cultivar. However, a further decrease in P affected plant growth, even under mycorrhizal conditions. Two commercially available AMF inocula (F. mosseae, Solrize®) and one laboratory inoculum (Rhizophagus irregularis) were tested for mycorrhizal development and protection against B. graminis f. sp. tritici of two moderately susceptible and resistant wheat cultivars at P/5. Mycorrhizal levels were the highest with F. mosseae (38 %), followed by R. irregularis (19 %) and Solrize® (SZE, 8 %). On the other hand, the highest protection level against B. graminis f. sp. tritici was obtained with F. mosseae (74 %), followed by SZE (58 %) and R. irregularis (34 %), suggesting that inoculum type rather than mycorrhizal levels determines the protection level of wheat against B. graminis f. sp. tritici. The mycorrhizal protective effect was associated with a reduction in the number of conidia with haustorium and with an accumulation of polyphenolic compounds at B. graminis f. sp. tritici infection sites. Both the moderately susceptible and the most resistant wheat cultivar were protected against B. graminis f. sp. tritici infection by F. mosseae inoculation at P/5, although the underlying mechanisms appear rather different between the two cultivars. This study emphasizes the importance of taking into account the considered parameters when considering the use of AMF as biocontrol agents. SN - 1432-1890 UR - https://www.unboundmedicine.com/medline/citation/27130314/Phosphorus_supply_arbuscular_mycorrhizal_fungal_species_and_plant_genotype_impact_on_the_protective_efficacy_of_mycorrhizal_inoculation_against_wheat_powdery_mildew_ DB - PRIME DP - Unbound Medicine ER -