Responses of Legume Versus Nonlegume Tropical Tree Seedlings to Elevated CO 2 Concentration

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dc.contributor.authorCernusak, Lucas
dc.contributor.authorWinter, Klaus
dc.contributor.authorMartinez, Carlos
dc.contributor.authorCorrea, Edwin
dc.contributor.authorAranda , Jorge
dc.contributor.authorGarcia, Milton
dc.contributor.authorJaramillo, Carlos
dc.contributor.authorTurner, Benjamin L
dc.date.accessioned2015-12-10T21:57:36Z
dc.date.issued2011
dc.date.updated2016-02-24T11:27:03Z
dc.description.abstractWe investigated responses of growth, leaf gas exchange Carbon-isotope discrimination, and whole-plant water-use efficiency (WP) to elevated CO2 concentration ([CO2]) in seedlings of five leguminous and five nonleguminous tropical tree species. Plants were grown at CO2 partial pressures of 40 and 70 Pa. As a group, legumes did not differ from nonlegumes in growth response to elevated CO2]. The mean ratio of final plant dry mass at elevated to ambient [CO2] (ME/MA) was 1.32 and 1.24 for legumes and nonlegumes, respectively. However, there was large variation in ME/MA among legume species (0.92-2.35), whereas nonlegumes varied much less (1.21-1.29). Variation among legume species in ME/MA was closely correlated with their capacity for nodule formation, as expressed by nodule mass ratio, the dry mass of nodules for a given plant dry mass. WP increased markedly in response to elevated [CO2] in all species. The ratio of intercellular to ambient CO2 partial pressures during photosynthesis remained approximately constant at ambient and elevated [CO2], as did carbon isotope discrimination, suggesting that WP should increase proportionally for a given increase in atmospheric [CO2]. These results suggest that tree legumes with a strong capacity for nodule formation could have a competitive advantage in tropical forests as atmospheric [CO2] rises and that the water-use efficiency of tropical tree species will increase under elevated [CO2].
dc.identifier.issn0032-0889
dc.identifier.urihttp://hdl.handle.net/1885/39851
dc.publisherAmerican Society of Plant Biologists
dc.sourcePlant Physiology
dc.subjectKeywords: carbon dioxide; nitrogen; article; comparative study; Fabaceae; growth, development and aging; metabolism; nitrogen fixation; physiology; tree; Carbon Dioxide; Fabaceae; Nitrogen; Nitrogen Fixation; Trees
dc.titleResponses of Legume Versus Nonlegume Tropical Tree Seedlings to Elevated CO 2 Concentration
dc.typeJournal article
local.bibliographicCitation.lastpage385
local.bibliographicCitation.startpage372
local.contributor.affiliationCernusak, Lucas, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationWinter, Klaus, Smithsonian Tropical Research Institute
local.contributor.affiliationMartinez, Carlos, Smithsonian Tropical Research Institute Balboa
local.contributor.affiliationCorrea, Edwin , Smithsonian Tropical Research Institute
local.contributor.affiliationAranda , Jorge, Smithsonian Tropical Research Institute
local.contributor.affiliationGarcia, Milton, Smithsonian Tropical Research Institute
local.contributor.affiliationJaramillo, Carlos, Smithsonian Tropical Research Institute Balboa
local.contributor.affiliationTurner, Benjamin L , Smithsonian Tropical Research Institute
local.contributor.authoremailrepository.admin@anu.edu.au
local.contributor.authoruidCernusak, Lucas, u4001780
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor060705 - Plant Physiology
local.identifier.absfor060203 - Ecological Physiology
local.identifier.absseo960806 - Forest and Woodlands Flora, Fauna and Biodiversity
local.identifier.absseo960305 - Ecosystem Adaptation to Climate Change
local.identifier.ariespublicationu4956746xPUB184
local.identifier.citationvolume157
local.identifier.doi10.1104/pp.111.182436
local.identifier.scopusID2-s2.0-80052406943
local.identifier.uidSubmittedByu4956746
local.type.statusPublished Version

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