Abstract
Background and Aims
Various biochars added to soil have been shown to improve plant performance. Moreover, a wood biochar was found to induce tomato and pepper plant systemic resistance to two foliar fungal pathogens. The aim of this study was to explore the ability of wood biochar and greenhouse waste biochar to induce systemic resistance in strawberry plants against Botrytis cinerea, Colletotrichum acutatum and Podosphaera apahanis, and to examine at the molecular level some of their impacts on plant defense mechanisms.
Methods
Disease development tests on plants grown on 1 or 3% biochar-amended potting mixture, and quantification of relative expression of 5 plant defense-related genes (FaPR1, Faolp2, Fra a3, Falox, and FaWRKY1) by real-time PCR were carried out.
Results
Biochar addition to the potting medium of strawberry plants suppressed diseases caused by the three fungi, which have very different infection strategies. This suggests that biochar stimulated a range of general defense pathways, as confirmed by results of qPCR study of defense-related gene expression. Furthermore, primed-state of defense-related gene expression was observed upon infection by B. cinerea and P. aphanis.
Conclusion
The ability of biochar amendment to promote transcriptional changes along different plant defense pathways probably contributes to its broad spectrum capacity for disease suppression.
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Abbreviations
- qPCR:
-
real time quantitative PCR
- RT:
-
reverse transcription
- IR:
-
induced resistance
- ISR:
-
induced systemic resistance
- SAR:
-
systemic acquired resistance
- HR:
-
hypersensitive reaction
- PR:
-
pathogenesis related proteins
- SA:
-
salicylic acid
- PGPR:
-
plant growth-promoting rhizobacteria
- PGPF:
-
plant growth-promoting fungi
- ET:
-
ethylene
- JA:
-
jasmonic acid
- MeJA:
-
methyl jasmonate
- CW:
-
biochar produced from citrus wood
- GHW-450:
-
biochar produced from greenhouse waste at 450°C
- AUDPC:
-
area under the disease progress curve
- Ct:
-
cycle threshold
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Acknowledgements
The authors wish to thank Dr. Nir Dai and Dr. David Ezra for their help with the molecular work. This work was supported by grants from The Autonomous Province of Trento, Call for Proposal Major Projects 2006, Project ENVIROCHANGE and by the Chief Scientist of the Ministry of Agriculture and Rural Development of Israel, project number 301-0693-10. This paper is contribution no. 506/11 of the Agricultural Research Organization, The Volcani Center, Israel.
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Meller Harel, Y., Elad, Y., Rav-David, D. et al. Biochar mediates systemic response of strawberry to foliar fungal pathogens. Plant Soil 357, 245–257 (2012). https://doi.org/10.1007/s11104-012-1129-3
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DOI: https://doi.org/10.1007/s11104-012-1129-3