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- Title
Effects of elevated atmospheric CO<sub>2</sub> on two southern forest diseases.
- Authors
Runion, G. B.; Prior, S. A.; Rogers, H. H.; Mitchell, R. J.
- Abstract
Research into the effects of rising atmospheric carbon dioxide (CO2) on plant diseases remains limited despite the economic importance of this subject. Loblolly pine (Pinus taeda) seedlings were exposed to ambient and twice ambient levels of atmospheric CO2 prior to inoculation with the fusiform rust fungus (the obligate pathogen Cronartium quercuum f.sp. fusiforme, CQF) or the pitch canker fungus (the facultative pathogen Fusarium circinatum, FC). Additionally, northern red oak seedlings (Quercus rubra; an alternate host of CQF) were exposed to ambient or elevated levels of atmospheric CO2 prior to inoculation with CQF. In all cases, disease incidence (percent of plants infected) and disease severity (proportion of each plant affected) were determined; with the oak seedlings, the latent period (time to sporulation) was also monitored. In general, disease incidence was decreased by exposure to elevated CO2. This exposure also increased the latent period for CQF on oak seedlings. In no instance did exposure to elevated CO2 affect disease severity. This research demonstrated that plants may benefit from exposure to the increasing concentration of CO2 in the atmosphere through decreases in fungal disease incidence.
- Subjects
EFFECT of atmospheric carbon dioxide on plants; PINE fusiform rust; CRONARTIUM quercuum; LOBLOLLY pine; RED oak; ATMOSPHERIC carbon dioxide; PLANT-atmosphere relationships
- Publication
New Forests, 2010, Vol 39, Issue 3, p275
- ISSN
0169-4286
- Publication type
Article
- DOI
10.1007/s11056-009-9170-7