ISSN:
1570-7458
Keywords:
wheat
;
aphids
;
hydroxamic acids
;
DIMBOA
;
DIMBOA-glucoside
;
EPG
;
electrical penetration graph
;
feeding deterrents
;
antixenosis
;
plant resistance
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Feeding behaviour of five species of cereal aphids in wheat seedlings differing in hydroxamic acid (Hx) levels, was monitored via electrical penetration graphs (EPG). Aphid species could be grouped as sensitive to the feeding deterrent effect of Hx in the seedlings (Rhopalosiphum padi, Schizaphis graminum, Sitobion avenae, andMetopolophium dirhodum) or insensitive to them (Rhopalosiphum maidis). However, when feeding behaviour was studied in artificial diets containing Hx, all species were equally sensitive to Hx. The behavour ofR. maidis was further compared with that ofR. padi through detailed EPG analysis. It was found that the insensitivity ofR. maidis to Hx in seedlings may be due to a feeding strategy avoiding contact with the compounds by decreasing the number of cellular punctures in live tissues other than sieve elements during its way to the phloem.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02383002
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