The aim of study was to gain a deeper knowledge about local and systemic changes in photosynthetic processes and sugar production of pepper infected by Obuda pepper virus (ObPV) and Pepper mild mottle virus (PMMoV). PSII efficiency, reflectance, and gas exchange were measured 48 and/or 72 h after inoculation (hpi). Sugar accumulation was checked 72 hpi and 20 d after inoculation (as a systemic response). Inoculation of leaves with ObPV led to appearance of hypersensitive necrotic lesions (incompatible interaction), while PMMoV caused no visible symptoms (compatible interaction). ObPV (but not PMMoV) lowered Fv/Fm (from 0.827 to 0.148 at 72 hpi). Net photosynthesis decreased in ObPV-infected leaves. In ObPV-inoculated leaves, the accumulation of glucose, fructose, and glucose-6-phosphate was accompanied with lowered sucrose, maltoheptose, nystose, and trehalose contents. PMMoV inoculation increased the contents of glucose, maltose, and raffinose in the inoculated leaves, while glucose-6-phosphate accummulated in upper leaves.
days after inoculation
electron transport chain
hours after inoculation
Obuda pepper virus
Pepper mild mottle virus
physiological reflectance index
reactive oxygen species
relative water content
structure insensitive pigment index
water band index
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Acknowledgment: We thank Dr. Lajos Zatykó (Research Institute of Vegetable Crops, Budatétény, Hungary) for kindly providing the pepper seeds. The experiments were conducted within a bilateral cooperation project between the Polish and Hungarian Academy of Sciences during 2013–2016. The financial support of the Hungarian Scientific Research Fund (OTKA K83615) is gratefully acknowledged.
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Janeczko, A., Dziurka, M., Gullner, G. et al. Comparative studies of compatible and incompatible pepper–Tobamovirus interactions and the evaluation of effects of 24-epibrassinolide. Photosynthetica 56, 763–775 (2018). https://doi.org/10.1007/s11099-017-0725-0
Additional key words
- CO2 assimilation
- systemic virus response
- water band index
- xanthophyll cycle