Air pollution impedes plant-to-plant communication by volatiles
Air pollution impedes plant-to-plant communication by volatiles
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DOI：
10.1111/j.1461-0248.2010.01510.x
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发表时间：
2010-09-01
期刊：
影响因子：
8.8
通讯作者：
Li, Tao
中科院分区：
文献类型：
--
作者：
Blande, James D.;Holopainen, Jarmo K.;Li, Tao
受损植物释放的挥发性有机化合物（VOCs）向未受损的邻近植物传递信息，以前的研究表明，这些信号在自然界中短距离有效。臭氧是农村地区最重要的对流层空气污染物，草食性VOCs与臭氧发生反应。我们使用花外花蜜（EFN）分泌作为菜豆植物间交流的表型指标，并表明富含臭氧（80 ppb）的大气减少了信号发生的距离。我们发现臭氧可以降解几种草食性挥发性有机化合物，这可能是减少通信距离的一种机制。直接暴露在80 ppb的臭氧环境下，不会影响月形花挥发性有机化合物的排放。此外，我们证明了高浓度的臭氧（120和160 ppb）会诱导暴露的植物分泌EFN，而较中等的浓度（80和100 ppb）则不会。这表明臭氧可以在月云的间接防御中发挥复杂的作用。
Volatile organic compounds (VOCs) emitted by damaged plants convey information to undamaged neighbouring plants, and previous research has shown that these signals are effective over short distances in nature. Many herbivore-induced VOCs react with ozone, which is the most important tropospheric air pollutant in rural areas. We used extrafloral nectar (EFN) secretion as a phenotypic indicator of between-plant communication in Phaseolus lunatus L. (Lima bean) and show that an ozone-rich (80 ppb) atmosphere reduces the distance over which signalling occurs. We found that ozone degrades several herbivore-induced VOCs, a likely mechanism reducing communication distances. Direct exposure to 80-ppb ozone did not affect the VOC emissions from P. lunatus. In addition, we demonstrated that high ozone concentrations, 120 and 160 ppb, induced EFN secretion in exposed plants, whereas more moderate concentrations, 80 and 100 ppb, did not. This suggests that ozone can play a complex role in the indirect defence of P. lunatus.