Role of Citrus Volatiles in Host Recognition, Germination and Growth of Penicillium Digitatum and Penicillium Italicum S
Available online at www.sciencedirect.com Postharvest Biology and Technology 49 (2008) 386–396 Role of citrus volatiles in host recognition, germination and growth of Penicillium digitatum and Penicillium italicum S. Droby a,∗, A. Eick a, D. Macarisin a,e, L. Cohen a, G. Rafael a, R. Stange b, G. McColum b, N. Dudai c, A. Nasser d, M. Wisniewski e, R. Shapira f a Department of Postharvest Science, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel b United States Department of Agriculture-Agricultural Research Service (USDA-ARS), U.S. Horticultural Research Laboratory, 2001 South Rock Road, Fort Pierce, FL 34945, USA c Department of Vegetable Crops, Newe Yaar Research Center, ARO, Ramat Yishay 30095, Israel d Institute of Soil, Water and Environmental Sciences, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 5250, Israel e United States Department of Agriculture-Agricultural Research Service (USDA-ARS),Appalachian Fruit Research Station, 2217 Wiltshire Road, Kearneysville, WV 25430, USA f Institute of Biochemistry, Food Science and Nutrition, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot 76100, Israel Received 4 September 2007; accepted 21 January 2008 Abstract Volatiles emitted from wounded peel tissue of various citrus cultivars had a pronounced stimulatory effect on germination and germ tube elongation of both Penicillium digitatum and P. italicum; however, P. digitatum appeared to be more sensitive to the stimulatory action of citrus peel volatiles. When exposed to volatiles from grapefruit peel discs, the percentage of germinated spores of P. digitatum and P. italicum was 75.1% and 37.5%, respectively, whereas germination of controls was 6.8% and 14.7%, respectively.
[Show full text]