Plant–plant–plant communications, mediated by ( E )-β-ocimene emitted from transgenic tobacco plants, prime indirect defense responses of lima beans

[摘要] Some volatile organic chemicals (VOCs), such as terpenes, are responsible for communication between plants. We assessed the priming ofdefense responses in lima bean by exposing the plants to transgenic-plant-volatiles [(E)-b-ocimene] emitted from transgenic tobacco plants (NtOS2). As it was previously shown that the first receiver lima bean plants, which were infested with spider mites after having been exposed to (E)-b-ocimene from NtOS2, were highly induced to emit VOCs, we analyzed the VOCs emitted from a second set of receiver plants (second receiver plants) exposed to the infested, first receiver plants. In response to feeding by spider mites, two homoterpenes [(E)-4,8-dimethyl-1,3,7-nonatriene and (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene] were more highly emitted from the second receiver plants in response to spider mite attack, in comparison to the levels emitted from plants that had been placed near infested, wild-type (WT)-volatile-exposed plants. These data suggest that transgenic-plant-volatile-mediated, multiple-plant communication can function in plant defenses.

[学科分类] 纳米科学和纳米技术

[关键词] indirect defense;plant-plant-plant communication;priming;spider mite;volatile organicchemicals (VOCs)