Journal of Phytopathology - Phytopathologische Zeitschrift (1996) 144, 33-36

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K. Engström and A. Strömberg (1996)
Changes in sugar content during induction of systemic acquired resistance to late blight caused by Phytophthora infestans (Mont.) de Bary in potato
Journal of Phytopathology - Phytopathologische Zeitschrift 144 (1), 33-36
Abstract: Resistance of plants to their pathogens may be systemically enhanced by a localized induction treatment, a characteristic named systemic acquired resistance (SAR). Changes in amounts and proportions of sucrose, glucose and fructose were examined in induced and non-induced potato plants (Solanum tuberosum L. cv. Matilda) before, and 1-9 days after challenge inoculation. The potato plants were induced and challenged with Phytophthora infestans (Mont.) de Bary. Plants which were non-induced and non-challenged were also tested (referred to as non-treated). The sugars were analysed using high-performance anion exchange chromatography with pulsed electrochemical detection, HPAE-PED (Dionex system). The amounts as well as the proportions of sucrose, glucose and fructose were similar throughout the experimental period in the non-treated plants. In induced plants, before challenge inoculation, the amount of sucrose was 44% lower than in non-treated plants. One day after challenge inoculation, the amount of sucrose had decreased by 79% in non-induced plants compared with non-treated plants, while the induced plants were much less affected. The total amount of all sugars were approximately the same 1 day before and 9 days after the challenge inoculation in all treatments. However, 1 day after challenge inoculation, a 65% decrease in total amount was observed in the non-induced plants compared with the smaller reduction of 37% in the induced plants. The large differences in sugar amounts and proportions between the different treatments are discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website


Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Phytophthora infestans Potato (Solanum tuberosum)
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