Ni Xinzhi, Quisenberry Sharron S
Crop Genetics and Breeding Research Unit, USDA-ARS, Coastal Plain Experiment Station, Tifton, GA 31793-0748, USA.
J Econ Entomol. 2006 Apr;99(2):551-8. doi: 10.1603/0022-0493-99.2.551.
Interspecific interactions between the symptomatic (chlorosis-eliciting) Russian wheat aphid, Diuraphis noxia (Mordvilko), and the asymptomatic (nonchlorosis-eliciting) bird cherry-oat aphid, Rhopalosiphum padi (L.), on four cereal genotypes were examined by simultaneous infestations. Four cereals (i.e., Diuraphis noxia-susceptible 'Arapahoe' wheat and 'Morex' barley, and D. noxia-resistant 'Halt' wheat and 'Border' oat) and four infestations (i.e., control, D. noxia, R. padi, and D. noxia/R. padi) were used in the research. Whereas D. noxia biomass confirmed D. noxia resistance among the cereals, R. padi biomass indicated that the D. noxia-resistant cereals did not confer R. padi resistance. D. noxia biomass was significantly lower in D. noxia/R. padi infestation than that in D. noxia infestation on all cereals, except Border oat, which indicated an antagonistic effect of R. padi on D. noxia. All aphid infestations caused a significant plant biomass reduction in comparison with the control. In comparison with D. noxia infestation, D. noxia/R. padi caused a significant plant biomass reduction on all cereals, except Morex barley. Although D. noxia biomass in D. noxia/R. padi infestation was significantly less than that in D. noxia infestation, leaf chlorophyll reduction was the same between D. noxia/R. padi and D. noxia infestations, which suggested that the asymptomatic R. padi enhanced the D. noxia-elicited leaf chlorophyll loss. The regression between chlorophyll content and aphid biomass indicated that the asymptomatic R. padi in the D. noxia/R. padi infestation enhanced chlorophyll loss, but interspecific aphid interaction on plant biomass varied among the cereals.
通过同时接种，研究了有症状（引起褪绿）的俄罗斯小麦蚜Diuraphis noxia (Mordvilko)与无症状（不引起褪绿）的鸟害草燕麦蚜Rhopalosiphum padi (L.)在四种谷物基因型上的种间相互作用。研究中使用了四种谷物（即对俄罗斯小麦蚜敏感的“Arapahoe”小麦和“Morex”大麦，以及抗俄罗斯小麦蚜的“Halt”小麦和“Border”燕麦）和四种接种处理（即对照、俄罗斯小麦蚜、鸟害草燕麦蚜，以及俄罗斯小麦蚜/鸟害草燕麦蚜）。俄罗斯小麦蚜的生物量证实了谷物对俄罗斯小麦蚜的抗性，而鸟害草燕麦蚜的生物量表明抗俄罗斯小麦蚜的谷物并不具有抗鸟害草燕麦蚜的特性。在所有谷物上，除了“Border”燕麦外，俄罗斯小麦蚜/鸟害草燕麦蚜接种处理中的俄罗斯小麦蚜生物量显著低于俄罗斯小麦蚜单独接种处理中的生物量，这表明鸟害草燕麦蚜对俄罗斯小麦蚜具有拮抗作用。与对照相比，所有蚜虫接种处理均导致植物生物量显著降低。与俄罗斯小麦蚜接种处理相比，俄罗斯小麦蚜/鸟害草燕麦蚜接种处理在除“Morex”大麦外的所有谷物上均导致植物生物量显著降低。虽然俄罗斯小麦蚜/鸟害草燕麦蚜接种处理中的俄罗斯小麦蚜生物量显著低于俄罗斯小麦蚜单独接种处理中的生物量，但俄罗斯小麦蚜/鸟害草燕麦蚜接种处理和俄罗斯小麦蚜单独接种处理之间的叶片叶绿素减少量相同，这表明无症状的鸟害草燕麦蚜增强了俄罗斯小麦蚜引起的叶片叶绿素损失。叶绿素含量与蚜虫生物量之间的回归分析表明，俄罗斯小麦蚜/鸟害草燕麦蚜接种处理中无症状的鸟害草燕麦蚜增强了叶绿素损失，但蚜虫种间对植物生物量的相互作用在不同谷物间有所不同。
