Abstract: Plant volatile organic compounds (VOCs) play important roles in three levels of trophic relationship of plant-herbivore-natural enemy, volatile signaling in plantplant interactions, and changes of plant adaptability. The emission of VOCs has the traits of specificity, systematicness, timedependence, and rhythmicity. VOCs affect the behaviors of herbivores in host-choice, oviposition, and courtship, and help predators or parasitoids to locate feeding herbivores. Four steps characterize the transfer of VOCs signals between plants,i.e., signal release from emitter plant, transport, and absorption and perception by receiver plant. The two methods commonly used for VOCs collection are adsorptionsolvent desorption and adsorptionthermal desorption.

Key words: Soil organic P, Research advance