« Previous AbstractDoes enhanced nutrient availability increase volatile emissions in cranberry?    Next AbstractAdsorption and Quantification of Volatile Organic Compounds (VOCs) by using Hybrid Magnetic Nanoparticles »

J Chem Ecol

Title:		"Genotypic Variation and Phenotypic Plasticity in Gene Expression and Emissions of Herbivore-Induced Volatiles, and their Potential Tritrophic Implications, in Cranberries"
Author(s):		De Lange ES; Salamanca J; Polashock J; Rodriguez-Saona C;
Address:		"Department of Entomology and Nematology, University of California Davis, 1 Shields Avenue, 367 Briggs Hall, Davis, CA, 95616, USA. esdelange@ucdavis.edu. Escuela de Ciencias Agricolas, Pecuarias y de Medio Ambiente (ECAPMA), Universidad Nacional Abierta y a Distancia (UNAD), Bogota, Colombia. Genetic Improvement of Fruits and Vegetables Laboratory, United States Department of Agriculture-Agricultural Research Service, 125A Lake Oswego Road, Chatsworth, NJ, 08019, USA. Department of Entomology, Philip E. Marucci Center for Blueberry and Cranberry Research and Extension, Rutgers University, 125A Lake Oswego Road, Chatsworth, NJ, 08019, USA"
Journal Title:		J Chem Ecol
Year:		2019
Volume:		20190103
Issue:		3
Page Number:		298 - 312
DOI:		10.1007/s10886-018-1043-0
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"Herbivorous insects are important problems in cranberry (Vaccinium macrocarpon Ait.) production. The use of chemical pesticides is common practice, but beneficial insects such as natural enemies of herbivores (e.g. predators and parasitoids) could be affected as well. Therefore, we studied the defensive mechanisms that cranberry plants use to combat pests, focusing on herbivore-induced plant volatiles (HIPVs), which can be used to recruit predators and parasitoids foraging for prey or hosts. Then, we used synthetic HIPVs to test the attraction of natural enemies. In a greenhouse, we assessed nine cranberry genotypes for expression of genes involved in HIPV biosynthesis and/or emission of HIPVs. In an experimental field, we assessed whether baiting traps with individual or combinations of HIPVs increased attractiveness to natural enemies. The results showed that different cranberry genotypes vary in their emission of monoterpenes and sesquiterpenes but not in their expression of two genes associated with terpene biosynthesis, alpha-humulene/beta-caryophyllene synthase and (3S,6E)-nerolidol/R-linalool synthase. Induction with methyl jasmonate or herbivore (gypsy moth, Lymantria dispar L.) feeding increased the expression of these genes and emission of HIPVs. The HIPV methyl salicylate (MeSA), alone or in combination with other HIPVs, increased syrphid attraction by 6-fold in the field, while (Z)-3-hexenyl acetate and MeSA repelled ladybeetles and megaspilids, respectively. Linalool and beta-caryophyllene elicited no behavioral responses of natural enemies. Elucidating the mechanisms of pest resistance, as well as experimentally augmenting plant defenses such as HIPVs, may contribute to the development of more sustainable pest management practices in crops, including cranberries"
Keywords:		*Gene Expression *Genotype *Herbivory *Phenotype Vaccinium macrocarpon/*metabolism Volatile Organic Compounds/*metabolism Gypsy moth Indirect defenses Methyl jasmonate Methyl salicylate Natural enemies Vaccinium macrocarpon;
Notes:		"MedlineDe Lange, Elvira S Salamanca, Jordano Polashock, James Rodriguez-Saona, Cesar eng NJ08192/Hatch Project/ x/New Jersey Blueberry and Cranberry Research Council, Inc., Cranberry Institute, Cape Cod Cranberry Growers Association, Canadian Cranberry Growers Coalition, and Ocean Spray Cranberries, Inc./ 2019/01/05 J Chem Ecol. 2019 Mar; 45(3):298-312. doi: 10.1007/s10886-018-1043-0. Epub 2019 Jan 3"