文章基本信息

标题：Physiological Effects of Smoke Exposure on Deciduous and Conifer Tree Species
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作者：W. John Calder ; Greg Lifferth ; Max A. Moritz 等
期刊名称：International Journal of Forestry Research
印刷版ISSN：1687-9368
电子版ISSN：1687-9376
出版年度：2010
卷号：2010
DOI：10.1155/2010/438930
出版社：Hindawi Publishing Corporation
摘要：Smoke from forest fires can persist in the environment for weeks and while there is a substantial amount of literature examining the effects of smoke exposure on seed germination, the effects of smoke on leaf function are nearly uninvestigated. The objective of this study was to compare growth and primary and secondary metabolic responses of deciduous angiosperm and evergreen conifer tree species to short smoke exposure. Twenty minutes of smoke exposure resulted in a greater than 50% reduction in photosynthetic capacity in five of the six species we examined. Impairment of photosynthesis in response to smoke was a function of reductions in stomatal conductance and biochemical limitations. In general, deciduous angiosperm species showed a greater sensitivity than evergreen conifers. While there were significant decreases in photosynthesis and stomatal conductance, smoke had no significant effect on growth or secondary defense compound production in any of the tree species examined.