The response of 12 clones of eastern white pine (Pinus strobus L.) to ozone and nitrogen dioxide

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dc.contributor.authorNicholson, Christopher Robinen
dc.contributor.departmentPlant Pathologyen
dc.date.accessioned2014-03-14T21:38:21Zen
dc.date.adate2010-06-12en
dc.date.available2014-03-14T21:38:21Zen
dc.date.issued1977en
dc.date.rdate2010-06-12en
dc.date.sdate2010-06-12en
dc.description.abstractGrafts were made using 2-0 rootstock and scion from 12 ortets of eastern white pine (Pinus strobus L.) growing at the Radford Army Ammunition Plant (RAAP). The 12 ortets represented 4 symptom severity classes (3 ortets/class) ranging from trees with > 25% of their crowns exhibiting necrotic tipburn (Class I) to those with healthy crowns (Class IV). Grafts were made in spring 1976 and ramets were grown in a greenhouse drawing charcoal filtered air. Each treatment was performed twice, on separate days for a total of 10 ramets/clone/ treatment. Five ramets/clone were used in each 6 hour treatment. The current years growth was 7-10 weeks old when treated. The treatments were as follows: 1) 0₃-10 pphm, 2) 0₃-30 pphm, 3) NO₂-10 pphm, 4) NO₂-30 pphm, 5) 0₃-10+NO₂ -10 pphm, 6) 0₃-10+NO₂ -30 pphm, 7) no pollutant. The fumigation chamber was a modified open-top field chamber located indoors. Environmental conditions during the 14 treatments averaged: 26 C, 64% RH, and 16 Klux. The ramets were evaluated prior to fumigation and then 2, 7, and 14 days thereafter for visible symptoms. The overall injury was generally light with only 11% of the clone treatment combinations exhibiting injury on > 25% of the needle fascicles. Clones I-1 and I-2 were the most sensitive clones while clones III-1, IV-2 and to a lesser degree clones III-3 and IV-1 were tolerant. These results agree with field ratings of eastern white pine sensitivity at the RAAP and provide the first step in the development of an air pollution bioindicator system at the installation.en
dc.description.degreeMaster of Scienceen
dc.format.extent141 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06122010-020322en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06122010-020322/en
dc.identifier.urihttp://hdl.handle.net/10919/43251en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1977.N525.pdfen
dc.relation.isformatofOCLC# 07218077en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1977.N525en
dc.subject.lcshPlants -- Effect of air pollution onen
dc.subject.lcshPlants -- Effect of ozone onen
dc.subject.lcshWhite pineen
dc.titleThe response of 12 clones of eastern white pine (Pinus strobus L.) to ozone and nitrogen dioxideen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplinePlant Pathologyen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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