Phosphorus availability drives mycorrhiza induced resistance in tomato
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Títol
Phosphorus availability drives mycorrhiza induced resistance in tomatoAutoria
Data de publicació
2022Editor
Frontiers MediaISSN
1664462XCita bibliogràfica
Dejana L, Ramírez-Serrano B, Rivero J, Gamir J, López-Ráez J.A. and Pozo M. J. (2022) Phosphorus availability drives mycorrhiza induced resistance in tomato. Front. Plant Sci. 13:1060926. doi: 10.3389/fpls.2022.1060926Tipus de document
info:eu-repo/semantics/articleVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Arbuscular mycorrhizal (AM) symbiosis can provide multiple benefits to the host
plant, including improved nutrition and protection against biotic stress. Mycorrhiza
induced resistance (MIR) against pathogens and ... [+]
Arbuscular mycorrhizal (AM) symbiosis can provide multiple benefits to the host
plant, including improved nutrition and protection against biotic stress. Mycorrhiza
induced resistance (MIR) against pathogens and insect herbivores has been
reported in different plant systems, but nutrient availability may influence the
outcome of the interaction. Phosphorus (P) is a key nutrient for plants and insects,
but also a regulatory factor for AM establishment and functioning. However, little is
known about how AM symbiosis and P interact to regulate plant resistance to
pests. Here, using the tomato-Funneliformis mosseae mycorrhizal system, we
analyzed the effect of moderate differences in P fertilization on plant and pest
performance, and on MIR against biotic stressors including the fungal pathogen
Botrytis cinerea and the insect herbivore Spodoperta exigua. P fertilization
impacted plant nutritional value, plant defenses, disease development and
caterpillar survival, but these effects were modulated by the mycorrhizal status
of the plant. Enhanced resistance of F. mosseae-inoculated plants against B.
cinerea and S. exigua depended on P availability, as no protection was observed
under the most P-limiting conditions. MIR was not directly explained by changes in
the plant nutritional status nor to basal differences in defense-related
phytohormones. Analysis of early plant defense responses to the damage
associated molecules oligogalacturonides showed primed transcriptional
activation of plant defenses occurring at intermediate P levels, but not under
severe P limitation. The results show that P influences mycorrhizal priming of plant
defenses and the resulting induced-resistance is dependent on P availability, and
suggest that mycorrhiza fine-tunes the plant growth vs defense prioritization
depending on P availability. Our results highlight how MIR is context dependent,
thus unravel molecular mechanism based on plant defence in will contribute to
improve the efficacy of mycorrhizal inoculants in crop protection. [-]
Publicat a
Frontiers in Plant Science 13:1060926Entitat finançadora
European Union’s Horizon 2020 Research and Innovation program | Spanish Government | CSIC intramural project
Codi del projecte o subvenció
info:eu-repo/grantAgreement/EC/H2020/765290 | RTI2018-094350-B-C31 | RED2018-02407-T | 201440E046
Drets d'accés
info:eu-repo/semantics/openAccess
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