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Impacts of Chronic SO 2 , O 3 , and SO 2 +O 3 Exposures on Photosynthesis of Pinus strobus Clones 1
Author(s) -
Boyer J. N.,
Houston D. B.,
Jensen K. F.
Publication year - 1986
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1986.tb00194.x
Subject(s) - photosynthesis , pinus <genus> , botany , ozone , fumigation , biology , clone (java method) , horticulture , chemistry , gene , genetics , organic chemistry
Grafts of sensitive and tolerant eastern white pine ( Pinus strobus L.) clones were exposed to extended (week‐long) low levels (5 pphm) of sulfur dioxide (S 2 O), ozone (O 3 ), and their combination in order to observe effects on photosynthesis. Consistent but statistically non‐significant increases in photosynthesis over the week were noted in all tolerant clones and in all but one sensitive clone when fumigated with SO 2 or SO 2 +O 3 . Likewise, O 3 consistently depressed photosynthesis in both tolerant and sensitive clones. There were significant differences in response between tolerant and sensitive clones fumigated with O 3 , and in the response of tolerant clones fumigated with O 3 versus those in SO 2 +O 3 .