Annals of Applied Biology (2017) 171, 155-171

R. Montero, H. El aou ouad, D. Pacifico, C. Marzachi, N. Castillo, E. García, N.F. Del Saz, I. Florez-Sarasa, J. Flexas and J. Bota (2017)
Effects of Grapevine leafroll-associated virus 3 on the physiology in asymptomatic plants of Vitis vinifera
Annals of Applied Biology 171 (2), 155-171
Abstract: Grapevine leafroll disease is one of the most important viral diseases of grapevine (Vitis vinifera) worldwide. Grapevine leafroll-associated virus 3 (GLRaV-3) is the most predominant virus species causing this disease. Therefore, it is important to identify GLRaV-3 effects, especially in plants which do not systematically show visual symptoms. In this study, effects of GLRaV-3 on grapevine physiology were evaluated in asymptomatic plants of Malvasía de Banyalbufar and Cabernet Sauvignon cvs. Absolute virus quantification was performed in order to determine the level of infection of the treatment. The net carbon dioxide (CO₂) assimilation (A_N) and electron transport rate (J_flux) were the main parameters affected by the virus. The A_N reduction in infected plants was attributed to restrictions in CO₂ diffusion caused by anatomical leaf changes and a reduction of Rubisco activity. Those effects were more evident in Malvasia de Banyalbufar plants. The reduction of A_N leads to a decrease in the total oxygen uptake rate by the activity of the cytochrome oxidase pathway, producing slight differences in plant growth. Therefore, even though no symptoms were expressed in the plants, the effects of the virus compromised the plant vital processes, showing the importance of early detection of the virus in order to fight against the infection.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Davide Pacifico, Cristina Marzachi

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Grapevine leafroll-associated virus 3	Grapevine (Vitis)