Silicon-induced changes in plant volatiles reduce attractiveness of wheat to the bird cherry-oat aphid Rhopalosiphum padi and attract the parasitoid Lysiphlebus testaceipes.

摘要: Silicon (Si) supplementation is well-known for enhancing plant resistance to insect pests, however, only recently studies revealed that Si accumulation in the not confers a mechanical barrier feeding, but also primes jasmonic acid-dependent defenses. Here, we examined whether alters wheat volatile emissions influence bird cherry-oat aphid (Rhopalosiphum padi) olfactory preference and parasitoid Lysiphlebus testaceipes. Even though did impact performance, found R. padi preferred constitutive volatiles from-Si over those emitted by +Si plants. In Y-tube olfactometer bioassays, was attracted from uninfested wheat, wheat. and-Si aphid-infested plants released equally attractive blends parasitoid; wasps were unable distinguish odors of treatments. GC-MS analyses increased amounts single compound, geranyl acetone, compared -Si similar By contrast, alter composition aphid-induced volatiles. Our results show changes blend induced mediate non-preference behavior attraction its L. Conversely literature, itself seems work as an elicitor defenses priming agent.