Application of volatile organic compounds, a method with potential for protecting potatoes during postharvest

Many plant-derived volatile organic compounds are known for their antifungal?properties. However, they have limited use because they diffuse rapidly after coming?in contact with air. Several in vitro studies were performed in order to understand the?relationship between the volatile compounds acetaldehyde and 2E-hexenal and their?potential to control potato postharvest diseases. 2E-hexenal was determined to be?the most effective of the two compounds in inhibiting the growth of Pectobacterium?atrosepticum, Colletotrichum coccodes, Helminthosporium solani, Phytophthora?erythroseptica, Pythium ultimum, Phytophthora infestans, Fusarium sambucinum,?and Alternaria solani at a headspace concentration of 7.5 ?L/L in vitro. Cytological?studies showed that 2E-hexenal prevented germination as well as hyphal elongation?of the two fungal blemish pathogens C. coccodes and H. solani in vitro at a minimum?treatment volume of 2.5 ?L/L. In vivo trials using inoculated single potatoes were?carried out which showed that 2E-hexenal was capable of inhibiting the growth of H.?solani in vivo at a minimum treatment volume of 5 ?L/L, but unable to control P.?atrosepticum, C. coccodes, P. erythroseptica, or P. ultimum at a treatment volume of?50 ?L/L under experimental conditions. This method of control has many potential?uses for protecting potatoes from postharvest potato pathogens, such as in storage?fumigation, controlled atmosphere storage, and fresh pack packaging of potatoes.SourcesTHE USE OF VOLATILE ORGANIC COMPOUNDS TO CONTROL?POSTHARVEST POTATO PATHOGENSWharton, PS1, Wood, EM1pwharton@uidaho.edu1University of Idaho, Aberdeen, Idaho, USAIHC 2014, International Horticulture Congress, 17-22 August 2014, Brisbane,?http://www.ihc2014.org/ Picture by www.omafra.gov.on.ca Key wordsPatata potato Perske ??????? ?? terpomo pomme de terre ?????? ??? aardappel ziemniak batata ????????? patates ??? ? Poscosecha postcosecha postharvest na-oes ?? ??? ?????? ?? post-r?colte ???? ?? ????????? na-oogst post-raccolta Obr?bka po p?s-colheita ?????????????? hasat sonras? Ernte ?????????????? ???? ??????????? postcollita poskliz?ov? ?? ?? ? nakon branja pozberov? obdelovanje zemlje po post-colleita ????? ????? pascapanen ?il?onn postharvest ???? p?c ra?as derliaus apdirbimas po lepas tuai ?? ?? ?????? post-recoltare ?????? ????? ????????????????? ??????????? ??????????????? sau thu ho?ch ??????????????? zangemva kwenkathi yokuvuna