Ranford Jonathan, Reiling Kevin
Applied Sciences, Faculty of Health and Sciences, Staffordshire University, College Road, Stoke-on-Trent, Staffordshire ST4 2DE, UK.
Environ Pollut. 2007 Jan;145(1):355-64. doi: 10.1016/j.envpol.2006.02.032. Epub 2006 May 19.
European Holly (Ilex aquifolium L.) was used to study the impact of one short (28 day) ozone fumigation episode on leaf production, leaf loss and stomatal conductance (g(s)), in order to explore potential longer term effects over 3 growing seasons. Young I. aquifolium plants received an episode of either charcoal-filtered air or charcoal-filtered air with 70 nl l(-1) O(3) added for 7 h d(-1) over a 28 day period from June 15th 1996, then placed into ambient environment, Stoke-on-Trent, U.K. Data were collected per leaf cohort over the next three growing seasons. Ozone exposure significantly increased leaf loss and stomatal conductance and reduced leaf production over all subsequent seasons. Impact of the initial ozone stress was still detected in leaves that had no direct experimental ozone exposure. This study has shown the potential of ozone to introduce long-term phenological perturbations into ecosystems by influencing productivity over a number of seasons.
欧洲冬青（枸骨叶冬青）被用于研究一次短期（28天）的臭氧熏蒸事件对叶片产生、叶片损失和气孔导度（gs）的影响，以探索在3个生长季节内潜在的长期影响。从1996年6月15日起的28天内，年轻的枸骨叶冬青植株每天接受7小时的木炭过滤空气或添加了70 nl l(-1) O(3)的木炭过滤空气处理，之后放置于英国特伦特河畔斯托克的自然环境中。在接下来的三个生长季节里，对每个叶片群组收集数据。臭氧暴露显著增加了叶片损失和气孔导度，并在所有后续季节减少了叶片产生。在没有直接进行实验性臭氧暴露的叶片中仍能检测到初始臭氧胁迫的影响。这项研究表明，臭氧有可能通过影响多个季节的生产力，给生态系统引入长期的物候扰动。
