Elevated O3 enhances the attraction of whitefly-infested tomato plants to Encarsia formosa
Elevated O3 enhances the attraction of whitefly-infested tomato plants to Encarsia formosa
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升高的 O3 增强了受粉虱侵染的番茄植株对 Encarsia Formosa 的吸引力
DOI：
10.1038/srep05350
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发表时间：
2014-06-18
影响因子：
4.6
通讯作者：
Ge, Feng
中科院分区：
文献类型：
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作者：
Cui, Hongying;Su, Jianwei;Ge, Feng
我们实验研究了O-3和粉虱草食性对番茄挥发物的影响，粉虱的取食和产卵偏好以及恩蚜小蜂福尔摩沙对两种番茄基因型，野生型（Wt）和茉莉酸（JA）防御增强基因型（JA-OE，35 S）的这些排放的行为反应。O-3水平和粉虱取食显著增加了番茄植株产生的挥发性有机化合物（VOCs）、单萜、绿色叶挥发物（GLVs）和醛类挥发物的总量。O-3+处理下，35 S植株挥发性有机物和单萜类挥发物的释放量高于Wt植株。取食和产卵的生物测定表明，对照植物是首选的成年粉虱，而35 S植物是不喜欢粉虱。在Y管试验中，O-3+处理基因型是E.福尔摩沙。35 S植株是E. O-3、草食动物和O-3+草食动物处理下的福尔摩沙。我们的研究结果表明，O3浓度升高和粉虱取食显著增加番茄挥发物，这吸引了E。福尔摩沙和减少粉虱取食。35 S植株对B的抗性较高。烟粉虱比植株Wt.这种变化表明，抗源基因型（如35 S）的直接和间接防御能力随着大气O-3浓度的增加而增强。
We experimentally examined the effects of elevated O-3 and whitefly herbivory on tomato volatiles, feeding and oviposition preferences of whiteflies and behavioural responses of Encarsia formosa to these emissions on two tomato genotypes, a wild-type (Wt) and a jasmonic acid (JA) defence-enhanced genotype (JA-OE, 35S). The O-3 level and whitefly herbivory significantly increased the total amount of volatile organic compounds (VOCs), monoterpenes, green leaf volatiles (GLVs), and aldehyde volatiles produced by tomato plants. The 35S plants released higher amount of total VOCs and monoterpene volatiles than Wt plants under O-3+herbivory treatments. The feeding and oviposition bioassays showed that control plants were preferred by adult whiteflies whereas the 35S plants were not preferred by whiteflies. In the Y-tube tests, O-3+herbivory treatment genotypes were preferred by adult E. Formosa. The 35S plants were preferred by adult E. formosa under O-3, herbivory and O-3+herbivory treatments. Our results demonstrated that elevated O3 and whitefly herbivory significantly increased tomato volatiles, which attracted E. formosa and reduced whitefly feeding. The 35S plants had a higher resistance to B. tabaci than Wt plant. Such changes suggest that the direct and indirect defences of resistant genotypes, such as 35S, could strengthen as the atmospheric O-3 concentration increases.