Plant defences mediate interactions between herbivory and the direct foliar uptake of atmospheric reactive nitrogen.,Nature Communications

当前位置： X-MOL 学术 › Nat. Commun. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Plant defences mediate interactions between herbivory and the direct foliar uptake of atmospheric reactive nitrogen.
Nature Communications ( IF 14.7 ) Pub Date : 2018-11-09 , DOI: 10.1038/s41467-018-07134-9
Stuart A Campbell _{1,

2} , Dena M Vallano _{2,

3}

Affiliation

Reactive nitrogen from human sources (e.g., nitrogen dioxide, NO₂) is taken up by plant roots following deposition to soils, but can also be assimilated by leaves directly from the atmosphere. Leaf uptake should alter plant metabolism and overall nitrogen balance and indirectly influence plant consumers; however, these consequences remain poorly understood. Here we show that direct foliar assimilation of NO₂ increases levels of nitrogen-based defensive metabolites in leaves and reduces herbivore consumption and growth. These results suggest that atmospheric reactive nitrogen could have cascading negative effects on communities of herbivorous insects. We further show that herbivory induces a decrease in foliar uptake, indicating that consumers could limit the ability of vegetation to act as a sink for nitrogen pollutants (e.g., smog from mobile emissions). Our study suggests that the interactions of foliar uptake, plant defence and herbivory could have significant implications for understanding the environmental consequences of reactive nitrogen.

中文翻译：

植物防御介导食草动物与叶面直接吸收大气活性氮之间的相互作用。

来自人类的活性氮（例如二氧化氮、NO ₂）在沉积到土壤后被植物根部吸收，但也可以被叶子直接从大气中吸收。叶子的吸收会改变植物的新陈代谢和整体氮平衡，并间接影响植物的消费者；然而，人们对这些后果仍知之甚少。在这里，我们表明，NO ₂的直接叶同化增加了叶子中氮基防御代谢物的水平，并减少了草食动物的消耗和生长。这些结果表明，大气活性氮可能对草食昆虫群落产生连锁负面影响。我们进一步表明，食草会导致叶面吸收减少，这表明消费者可能会限制植被作为氮污染物（例如，移动排放产生的烟雾）的汇的能力。我们的研究表明，叶面吸收、植物防御和草食之间的相互作用可能对理解活性氮的环境后果具有重要意义。

更新日期：2018-11-09

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南