« Previous Abstract"Simulation of oak early life history and interactions with disturbance via an individual-based model, SOEL"    Next Abstract"Relationship of the occurrence and function of 2,6-dichlorophenol in two species of Amblyomma (Acari: Ixodidae)" »

Theor Appl Genet

Title:		Plant volatile-induced aphid resistance in barley cultivars is related to cultivar age
Author(s):		Kellner M; Brantestam AK; Ahman I; Ninkovic V;
Address:		"Department of Ecology, Swedish University of Agricultural Sciences, Box 7044, 750 07, Uppsala, Sweden"
Journal Title:		Theor Appl Genet
Year:		2010
Volume:		20100624
Issue:		6
Page Number:		1133 - 1139
DOI:		10.1007/s00122-010-1377-7
ISSN/ISBN:		1432-2242 (Electronic) 0040-5752 (Linking)
Abstract:		"Recent studies have shown that volatile chemical interaction between certain barley (Hordeum vulgare) cultivars can cause reduced host plant acceptance by the aphid Rhopalosiphum padi, and that certain cultivars can induce this effect while others can respond. In this study, we tested whether inducing and responding capabilities are linked to year of release in Swedish two-rowed spring barley. Eighteen cultivars released between 1897 and 1992 were tested in randomly selected subsets with pairwise combinations of volatile emitters and receivers. Significantly reduced aphid acceptance as a result of exposure to volatiles from plants of a different cultivar were found in 24% of the cultivar combinations. In general, older cultivars had a higher degree of aphid resistance after barley volatile treatment than did younger cultivars. The inducing effect of the emitter was also related to date of emitter cultivar release but the time relationship was reversed. Combinations with a younger volatile emitter and an older volatile receiver gave the strongest reduction in aphid acceptance of treated plants. Linear relationships between microsatellite diversity of emitting cultivars and their efficiency as inducers indicated that younger cultivars might have a more unique odour, whereas older cultivars may be more sensitive to induction"
Keywords:		Aging/physiology Animals Aphids/genetics/*physiology Hordeum/genetics/growth & development/*parasitology Host-Parasite Interactions/drug effects/*genetics Plant Diseases/genetics/parasitology Plants Seasons Volatile Organic Compounds/pharmacology;
Notes:		"MedlineKellner, Martin Brantestam, Agnese Kolodinska Ahman, Inger Ninkovic, Velemir eng Research Support, Non-U.S. Gov't Germany 2010/06/25 Theor Appl Genet. 2010 Oct; 121(6):1133-9. doi: 10.1007/s00122-010-1377-7. Epub 2010 Jun 24"