Record ID No. |
4040 |
Author(s) |
Sabine C. Jung, Javier García-Andrade, Adriaan Verhage, Iván M. Fernández, Juan M. García, Concepción Azcón-Aguilar and María J. Pozo , 2012 |
Title |
Arbuscular mycorrhiza induce systemic resistance against gray mold (Botrytis cinerea) in tomato through priming of JA-dependent defense responses |
Source. Vol.(no):Page |
IOBC/WPRS Bulletin, 83: 139-144p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Hormones |
Host |
Botrytis cinerea (Gray mold), Solanum lycopersicum |
Organism |
Arbuscular Mycorrhiza (AM) |
Abstracts |
Arbuscular mycorrhizal fungi (AMF) are soil fungi that form mutualistic symbioses with the roots of about 80% of all terrestrial plants. The association improves plant fitness in terms of nutrition and resistance to biotic and abiotic stresses. We analyzed the susceptibility of mycorrhizal and non-mycorrhizal tomato plants to the necrotrophic fungus Botrytis cinerea,
causal agent of gray mold in tomato leaves. Disease severity was lower in mycorrhizal plants. Moreover, the amount of pathogen in the tissues was significantly reduced in those plants. Similar results were obtained in whole plant and detached-leaf assays, confirming Mycorrhiza Induced Resistance (MIR) to B. cinerea. We have analyzed the possible role of jasmonate regulated defense responses in the enhanced resistance. The induction of jasmonic acid (JA)-dependent marker genes in response to Botrytis inoculation was higher in mycorrhizal plants. Furthermore, mycorrhizal plants displayed a potentiated response to exogenous application of JA. Altogether, our results suggest that systemic resistance to B. cinerea in mycorrhizal plants is associated to priming of JA-dependent responses.
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