{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83706"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83706","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Soybean Responses to Atmospheric Increases in Carbon Dioxide and Ozone","abstract":"Atmospheric concentration of carbon dioxide (CO2) has been increasing steadily since the industrial revolution and is expected to double by the middle of this century. Ozone (O3), a secondary air pollutant, has become an issue in the last decades for its damaging effects on humans as well on animals and plants. The effects of elevated carbon dioxide ([CO 2] = 550 mumol mol-1), ozone ([O3] = 1.2 x ambient) and their combination were evaluated in three soybean cultivars from maturation group (MG) II (Corsoy-79, Dwight and Loda) and three cultivars from MG III (Papa, Pioneer 931315 and Williams), using a FACE (Free Air Concentration Enrichment) facility (www.soyface.uiuc.edu). Elevated [CO2] caused an improvement in final plant height and yield components (number of nodes, pods and seeds per plant; seed volume and seed weight), while elevated [O 3] had an opposite effect. Plants grown under elevated [CO2] alone or in combination with elevated [O3] experienced also a delay in senescence and seeds of Loda and Pana demonstrated seed chlorophyll retention at harvest. No changes in seed N or fatty acid content were found due to treatment; however, variation among the years of evaluation was observed. Seed size was strongly correlated to seed C content but not to seed N. Total seed isoflavone content response to treatments was cultivar-dependent, with elevated [CO2] causing an increase in Dwight and Loda and elevated [O 3] causing a decrease in Corsoy and Loda. Isoflavone concentration also varied among the years of evaluation, indicating that other environmental factors influenced plant responses. A reduction in seed Ca and Zn content due to elevated [CO2] and an increase due to elevated [O3 ] was observed in most cultivars evaluated. Results presented also demonstrate that elevated [CO2] mitigates the damages caused by elevated [O 3].","abstract_html":"Atmospheric concentration of carbon dioxide (CO2) has been increasing steadily since the industrial revolution and is expected to double by the middle of this century. Ozone (O3), a secondary air pollutant, has become an issue in the last decades for its damaging effects on humans as well on animals and plants. The effects of elevated carbon dioxide ([CO 2] = 550 mumol mol-1), ozone ([O3] = 1.2 x ambient) and their combination were evaluated in three soybean cultivars from maturation group (MG) II (Corsoy-79, Dwight and Loda) and three cultivars from MG III (Papa, Pioneer 931315 and Williams), using a FACE (Free Air Concentration Enrichment) facility (www.soyface.uiuc.edu). Elevated [CO2] caused an improvement in final plant height and yield components (number of nodes, pods and seeds per plant; seed volume and seed weight), while elevated [O 3] had an opposite effect. Plants grown under elevated [CO2] alone or in combination with elevated [O3] experienced also a delay in senescence and seeds of Loda and Pana demonstrated seed chlorophyll retention at harvest. No changes in seed N or fatty acid content were found due to treatment; however, variation among the years of evaluation was observed. Seed size was strongly correlated to seed C content but not to seed N. Total seed isoflavone content response to treatments was cultivar-dependent, with elevated [CO2] causing an increase in Dwight and Loda and elevated [O 3] causing a decrease in Corsoy and Loda. Isoflavone concentration also varied among the years of evaluation, indicating that other environmental factors influenced plant responses. A reduction in seed Ca and Zn content due to elevated [CO2] and an increase due to elevated [O3 ] was observed in most cultivars evaluated. Results presented also demonstrate that elevated [CO2] mitigates the damages caused by elevated [O 3].","abstract_has_math":false,"creators":["Bordignon, Jose Renato"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Food Science and Human Nutrition","degree_department":null,"school":null,"contributors":["Engeseth, Nicki J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:10:07Z","date_published":"2015-09-25T21:10:07Z","updated_at":"2026-07-22T22:26:21Z","subjects":["Biology, Plant Physiology"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3269847"],"render_values":[{"text":"(MiAaPQ)AAI3269847","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83706","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Engeseth, Nicki J."]},{"key":"dc:creator","label":"Author","values":["Bordignon, Jose Renato"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:10:07Z","10000-01-01","2007"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Food Science and Human Nutrition"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology, Plant Physiology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83706","(MiAaPQ)AAI3269847"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Atmospheric concentration of carbon dioxide (CO2) has been increasing steadily since the industrial revolution and is expected to double by the middle of this century. Ozone (O3), a secondary air pollutant, has become an issue in the last decades for its damaging effects on humans as well on animals and plants. The effects of elevated carbon dioxide ([CO 2] = 550 mumol mol-1), ozone ([O3] = 1.2 x ambient) and their combination were evaluated in three soybean cultivars from maturation group (MG) II (Corsoy-79, Dwight and Loda) and three cultivars from MG III (Papa, Pioneer 931315 and Williams), using a FACE (Free Air Concentration Enrichment) facility (www.soyface.uiuc.edu). Elevated [CO2] caused an improvement in final plant height and yield components (number of nodes, pods and seeds per plant; seed volume and seed weight), while elevated [O 3] had an opposite effect. Plants grown under elevated [CO2] alone or in combination with elevated [O3] experienced also a delay in senescence and seeds of Loda and Pana demonstrated seed chlorophyll retention at harvest. No changes in seed N or fatty acid content were found due to treatment; however, variation among the years of evaluation was observed. Seed size was strongly correlated to seed C content but not to seed N. Total seed isoflavone content response to treatments was cultivar-dependent, with elevated [CO2] causing an increase in Dwight and Loda and elevated [O 3] causing a decrease in Corsoy and Loda. Isoflavone concentration also varied among the years of evaluation, indicating that other environmental factors influenced plant responses. A reduction in seed Ca and Zn content due to elevated [CO2] and an increase due to elevated [O3 ] was observed in most cultivars evaluated. Results presented also demonstrate that elevated [CO2] mitigates the damages caused by elevated [O 3].","Made available in DSpace on 2015-09-25T21:10:07Z (GMT). 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Ozone (O3), a secondary air pollutant, has become an issue in the last decades for its damaging effects on humans as well on animals and plants. The effects of elevated carbon dioxide ([CO 2] = 550 mumol mol-1), ozone ([O3] = 1.2 x ambient) and their combination were evaluated in three soybean cultivars from maturation group (MG) II (Corsoy-79, Dwight and Loda) and three cultivars from MG III (Papa, Pioneer 931315 and Williams), using a FACE (Free Air Concentration Enrichment) facility (www.soyface.uiuc.edu). Elevated [CO2] caused an improvement in final plant height and yield components (number of nodes, pods and seeds per plant; seed volume and seed weight), while elevated [O 3] had an opposite effect. Plants grown under elevated [CO2] alone or in combination with elevated [O3] experienced also a delay in senescence and seeds of Loda and Pana demonstrated seed chlorophyll retention at harvest. No changes in seed N or fatty acid content were found due to treatment; however, variation among the years of evaluation was observed. Seed size was strongly correlated to seed C content but not to seed N. Total seed isoflavone content response to treatments was cultivar-dependent, with elevated [CO2] causing an increase in Dwight and Loda and elevated [O 3] causing a decrease in Corsoy and Loda. Isoflavone concentration also varied among the years of evaluation, indicating that other environmental factors influenced plant responses. A reduction in seed Ca and Zn content due to elevated [CO2] and an increase due to elevated [O3 ] was observed in most cultivars evaluated. Results presented also demonstrate that elevated [CO2] mitigates the damages caused by elevated [O 3].","Made available in DSpace on 2015-09-25T21:10:07Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3269847.pdf: 7283204 bytes, checksum: 58a2330bf8aa87397c7f618ad92b4cbb (MD5) Previous issue date: 2007","Embargo set by: Seth Robbins for item 84987 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","213 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007."],"dc:identifier":["http://hdl.handle.net/2142/83706","(MiAaPQ)AAI3269847"],"dc:language":["eng"],"dc:subject":["Biology, Plant Physiology"],"dc:title":["Soybean Responses to Atmospheric Increases in Carbon Dioxide and Ozone"],"dc:type":["text"],"thesis:degree_discipline":["Food Science and Human Nutrition"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:21Z"}