Divergent molecular and growth responses of young “Cabernet Sauvignon” (Vitis vinifera) plants to simple and mixed infections with Grapevine rupestris stem pitting-associated virus
Year: 2020
Type: article
Abstract: Grapevine rupestris stem pitting associated virus(GRSPaV) is one of the most widely distributed viruses; even so, little is known about its effect onVitis vinifera. To provide new insights, the effects of single and mixed GRSPaV infections on theV. viniferacultivar “Cabernet Sauvignon” were studied by evaluating growth parameters, such as measurements of the total plant length, the number and distance of internodes and the number of leaves per shoot. In addition, parameters relating to gas exchange,i.e., the stomatal conductance, net photosynthetic rate, internal CO2concentration and leaf transpiration, were also assessed. All the measurements were performed in one- and two-year-old plants with a single GRSPaV infection or mixed infections of GRSPaV andGrapevine fanleaf virus(GFLV). The results show that the plant phytosanitary status did not significantly alter the growth and gas exchange parameters in one-year-old plants. However, in two-year-old plants, single GRSPaV infections increased shoot elongation, which was accompanied by the overexpression of genes associated with the gibberellic acid response pathway. The gas exchange parameters of these plants were negatively affected, despite exhibiting higherLHCIIgene expression. Plants with mixed infections did not have modified growth parameters, although they presented a greater reduction in the primary photosynthetic parameters evaluated with no change inLHCIIexpression. The results presented here confirm the co-evolution hypothesis forV. viniferaand GRSPaV during the early stages of plant development, and they provide new evidence about the effects of GRSPaV and GFLV co-infections on the “Cabernet Sauvignon” cultivar.
Source: Horticulture Research
Authors: M. Tobar, N. Fiore, A. G. Pérez-Donoso, R. León, I. M. Rosales, M. Gambardella
Institutions: Pontificia Universidad Católica de Chile, University of Chile
Language: English
Topic: Plant Virus Research Studies
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $2,250
OpenAlex ID: W2998039693