title: Effects of vehicle exhaust emissions on urban wild plant species.
abstract: Very few investigations have examined the direct impacts of vehicle exhausts on plants and attempted to separate out the key pollutants responsible for observed effects. This paper describes a multi-phase investigation into this topic, using 12 herbaceous species typical of urban areas and representing different functional groups. Fumigations were conducted in solardomes with diesel exhaust pollutants at concentrations designed to simulate those close to a major highway in inner London. A wide range of effects were detected, including growth stimulation and inhibition, changes in gas exchange and premature leaf senescence. This was complemented by controlled fumigations with NO, NO(2) and their mixture, as well as a transect study away from a busy inner London road. All evidence suggested that NO(x) was the key phytotoxic component of exhaust emissions, and highlights the potential for detrimental effects of vehicle emissions on urban ecosystems.
authors: Centre for Environmental Policy, Imperial College London, SW7 2AZ, UK.
authors: J N B
authors: JN
authors: Bell
authors: S L
authors: SL
authors: Honour
authors: S A
authors: SA
authors: Power
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000633:toxicity*; D000397:Air Pollution / Q000706:statistics & numerical data; D044822:Biodiversity; D002947:Cities; D004784:Environmental Monitoring; D009569:Nitric Oxide / Q000032:analysis / Q000633:toxicity; D009585:Nitrogen Dioxide / Q000032:analysis / Q000633:toxicity; D063245:Plant Development; D010944:Plants / Q000145:classification / Q000187:drug effects*; D001335:Vehicle Emissions / Q000032:analysis / Q000633:toxicity*
chemical_list: D000393:Air Pollutants; D001335:Vehicle Emissions; D009569:Nitric Oxide; D009585:Nitrogen Dioxide