biostudies-literatureUnknown11(24)Guarino SThe citrus tristeza virus (CTV) is an agent of devastating epidemics of the citrus plant grafted on <i>Citrus aurantium,</i> one of the main rootstocks still used in the Mediterranean area. Consequently, CTV-tolerant alternative citrus rootstocks are considered necessary to manage this disease and/or its vector; that in Mediterranean countries is the aphid <i>Aphis gossypii</i>. In this study, we analyzed the VOCs emitted from <i>Citrus sinensis</i> plants grafted on the CTV-susceptible <i>C. aurantium</i> and on the CTV-tolerant Volkamer lemon, Forner-Alcaide no. 5, and Carrizo citrange. Furthermore, the aphid preference/avoidance response toward these combinations was evaluated in a semi-field experiment. The VOC profiles recorded on the leaves of <i>C. sinensis</i> grafted on the four rootstocks listed above showed significant differences in the abundances and ratios of the compounds emitted. The behavioral experiments indicated that <i>A. gossypii</i> prefers to orient and establish on the <i>C. sinensis</i> plants grafted on <i>C. aurantium</i> rather than on that grafted on the three CTV-tolerant varieties. The possibility that this avoidance mechanism is triggered by the different profile of the VOC emitted by the different combinations and the consequent susceptibility/tolerance shown toward CTV is discussed.Plants (Basel, Switzerland)3426https://www.ebi.ac.uk/biostudies/studies/S-EPMC9788239biostudies-literatureRootstocks with Different Tolerance Grade to Citrus Tristeza Virus Induce Dissimilar Volatile Profile in <i>Citrus sinensis</i> and Avoidance Response in the Vector <i>Aphis gossypii</i> Glover.PMC9788239Motisi AFatta Del Bosco SGuarino SAbbate LMercati FfalseRootstocks with Different Tolerance Grade to Citrus Tristeza Virus Induce Dissimilar Volatile Profile in <i>Citrus sinensis</i> and Avoidance Response in the Vector <i>Aphis gossypii</i> Glover.The citrus tristeza virus (CTV) is an agent of devastating epidemics of the citrus plant grafted on <i>Citrus aurantium,</i> one of the main rootstocks still used in the Mediterranean area. Consequently, CTV-tolerant alternative citrus rootstocks are considered necessary to manage this disease and/or its vector; that in Mediterranean countries is the aphid <i>Aphis gossypii</i>. In this study, we analyzed the VOCs emitted from <i>Citrus sinensis</i> plants grafted on the CTV-susceptible <i>C. aurantium</i> and on the CTV-tolerant Volkamer lemon, Forner-Alcaide no. 5, and Carrizo citrange. Furthermore, the aphid preference/avoidance response toward these combinations was evaluated in a semi-field experiment. The VOC profiles recorded on the leaves of <i>C. sinensis</i> grafted on the four rootstocks listed above showed significant differences in the abundances and ratios of the compounds emitted. The behavioral experiments indicated that <i>A. gossypii</i> prefers to orient and establish on the <i>C. sinensis</i> plants grafted on <i>C. aurantium</i> rather than on that grafted on the three CTV-tolerant varieties. The possibility that this avoidance mechanism is triggered by the different profile of the VOC emitted by the different combinations and the consequent susceptibility/tolerance shown toward CTV is discussed.2022-01-01T00:00:00Z2022 Dec2025-04-18T16:00:17.073Z2025-04-07T02:58:32.043ZS-EPMC97882393655953810.3390/plants11243426