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Boosting potato defence against late blight

a study from field to molecule

Bengtsson, Therése (2013). Boosting potato defence against late blight. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2013:58
ISBN 978-91-576-7854-6
eISBN 978-91-576-7855-3
[Doctoral thesis]

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Abstract

For more than one century efforts has been made to obtain potato (Solanum tuberosum) cultivars resistant to late blight. However, introduced resistance has repeatedly been overcome by Phytophthora infestans (Mont) de Bary. Today late blight control is dependent on the frequent use of fungicides, but development of fungicide resistance and increasing fungicide restrictions by EU are of major concern. Methods with less fungicide requirement is therefore of crucial importance for a more environmentally sound and sustainable late blight control in the future.

In this study the potential of integrating BABA-induced resistance in existing late blight management with fungicides was investigated in field. The fungicide dose could be lowered with up to 25% when combined with BABA, without any decrease in late blight control or metabolic cost in terms of tuber yield. BABA was shown to directly activate basal defence responses and hormone signaling in potato. The BABA-induced hypersensitive-like lesions and major changes in the amino acid balance indicate that BABA induces resistance by stress imprinting.

Furthermore the potential of using a biosurfactant, produced by Psuedomonas koreensis strain 2.74, to control late blight in greenhouse was demonstrated. The biosurfactant was shown to have a direct effect on zoospores and also to induce PR-1 accumulation in the apoplast of potato leaves. Future experiments will reveal if the biosurfactant induces other defence mechanisms in potato.

This study demonstrated how integration of different control methods could lead to unchanged or even improved late blight control despite the decrease in fungicide dose.

Authors/Creators:Bengtsson, Therése
Title:Boosting potato defence against late blight
Subtitle:a study from field to molecule
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2013
Volume:2013:58
Number of Pages:80
Papers/manuscripts:
NumberReferences
ILiljeroth, E., Bengtsson, T., Wiik, L. & Andreasson, E. (2010). Induced resistance in potato against Phytophthora infestans – effects of BABA in greenhouse and field tests with different potato varieties. European Journal of Plant Pathology 127(2), 171-183.
IIHultberg, M., Bengtsson, T. & Liljeroth, E. (2010). Late blight on potato is suppressed by the biosurfactant-producing strain Pseudomonas koreensis 2.74 and its biosurfactant. Biocontrol 55(4), 543-550.
IIIBengtsson, T., Holefors, A., Witzell, J., Andreasson, E. & Liljeroth, E. (2013). Activation of defense responses to Phytophthora infestans in potato by BABA. Plant Pathology, DOI: 10.1111/ppa.12069.
IVBengtsson, T., Liljeroth, E., Andreasson, E., Holefors, A., Caspersen, S., Alsanius, B. & Hultberg, M. Biosurfactant have the potential to induce defence against Phytophthora infestans in potato. (Manuscript).
VBengtsson, T., Proux-Wéra, E., Levander, F., Resjö, S., Moushib, L., Hedley, P., Liljeroth, E., Alexandersson, E. & Andreasson, E. Proteomics and transcriptomics of BABA-induced resistance response in potato. (Manuscript)
Place of Publication:Alnarp
Publisher:Dept. of Plant Protection Biology, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:Z - SLU - Libray > Odla mera
ISBN for printed version:978-91-576-7854-6
ISBN for electronic version:978-91-576-7855-3
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H20 Plant diseases
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Biochemistry and Molecular Biology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Other Biological Topics
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Agrovoc terms:solanum tuberosum, phytophthora infestans, fungal disease, disease control, field experimentation, pseudomonas, blight
Keywords:BABA, biosurfactant, disease control, field trials, induced resistance, integration, late blight, Phytophthora infestans, Pseudomonas koreensis, Solanum tuberosum
URN:NBN:urn:nbn:se:slu:epsilon-e-1601
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1601
ID Code:10753
Department:(LTJ, LTV) > Department of Plant Protection Biology
External funders:FORMAS and Stiftelsen Lantbruksforskning
Deposited By: Therese Bengtsson
Deposited On:23 Aug 2013 12:10
Metadata Last Modified:22 Mar 2015 15:13

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