Persistent stimulation of CO2 assimilation and stomatal conductance by summer ozone fumigation in Norway spruce

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Show simple item record Eamus, D Barnes, JD Mortensen, L Ro-Poulsen, H Davison, AW 2011-02-07T06:20:32Z 1990
dc.identifier.citation Environmental Pollution, 1990, 63 (4), pp. 365 - 379
dc.identifier.issn 0269-7491
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract CO2 assimilation rate, stomatal conductance and chlorophyll content of current and previous years' needles of Norway spruce were measured in May 1988, 205 days after the cessation of ozone fumigation during the summer of 1987. Rates of assimilation were consistently higher for both needle year age classes for ozone fumigated trees in comparison to control trees, although only statistically significant for part of the day for current year's needles. A 26% and 48% stimulation, overall, in mean daily rates of assimilation for current and previous years' needles of ozone fumigated trees was observed. This was due to an enhanced apparent quantum yield and light saturated rate of assimilation of ozone fumigated trees. The temperature response regression of assimilation versus temperature was also greater, such that at any given temperature, assimilation was higher for ozone treated trees than control trees. Stomatal conductance was greater for ozone fumigated trees than the controls, but this was only marginally statistically significant. Moreover, there was a consistent increase in chlorophyll content in both year classes in ozone-treated trees. These results are discussed in relation to a possible long term effect of ozone fumigation upon the processes of conifer winter hardening and spring de-hardening. © 1990.
dc.language eng
dc.relation.isbasedon 10.1016/0269-7491(90)90141-X
dc.title Persistent stimulation of CO2 assimilation and stomatal conductance by summer ozone fumigation in Norway spruce
dc.type Journal Article
dc.parent Environmental Pollution
dc.journal.volume 4
dc.journal.volume 63
dc.journal.number 4 en_US
dc.publocation Oxford en_US
dc.identifier.startpage 365 en_US
dc.identifier.endpage 379 en_US SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 0602 Ecology
dc.personcode 000006
dc.percentage 100 en_US Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc false
utslib.collection.history Closed (ID: 3)
utslib.collection.history School of the Environment (ID: 344)

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