Intraspecific, ecotypic and home climate variation in photosynthetic traits of the widespread invasive grass Johnsongrass

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dc.contributor.authorKelly, Shannenen
dc.contributor.authorFletcher, Rebecca A.en
dc.contributor.authorBarney, Jacoben
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessioned2020-08-21T14:15:32Zen
dc.date.available2020-08-21T14:15:32Zen
dc.date.issued2020-05-05en
dc.description.abstractDespite their near ubiquity across global ecosystems, the underlying mechanisms contributing to the success of invasive plants remain largely unknown. In particular, ecophysiological traits, which are fundamental to plants' performance and response to their environment, are poorly understood with respect to geographic and climate space. We evaluated photosynthetic trait variation among populations, ecotypes and home climates (i.e. the climates from the locations they were collected) of the widespread and expanding invader Johnsongrass (Sorghum halepense). We found that populations vary in the maximum net photosynthetic flux and the light-saturated net photosynthetic rate, and that agricultural and non-agricultural ecotypes vary in apparent quantum yield and water-use efficiency (WUE). We also found that populations from warmer home climates had lower dark respiration rates, light compensation points and WUEs. As Johnsongrass expands across the USA the abiotic and biotic environments are driving variation in its genetics, phenotypes and its underlying physiology. Our study demonstrates the importance of evaluating physiological traits in invasive plants, especially as they relate to home climates.en
dc.description.notesWe thank the John Jachetta Undergraduate Research Award from the Weed Science Society of America to S.K., Virginia Tech College of Agriculture and Life Sciences and NIFA Global Food Security Coordinated Agricultural Projects (2015-68004-23492) for partial support.en
dc.description.sponsorshipWeed Science Society of America; NIFA Global Food Security Coordinated Agricultural Projects [2015-68004-23492]; Virginia Tech College of Agriculture and Life Sciencesen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1093/aobpla/plaa015en
dc.identifier.issn2041-2851en
dc.identifier.issue3en
dc.identifier.otherplaa015en
dc.identifier.pmid32549973en
dc.identifier.urihttp://hdl.handle.net/10919/99800en
dc.identifier.volume12en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectFunctional traitsen
dc.subjectinvasive speciesen
dc.subjectJohnsongrassen
dc.subjectSorghum halepenseen
dc.titleIntraspecific, ecotypic and home climate variation in photosynthetic traits of the widespread invasive grass Johnsongrassen
dc.title.serialAoB Plantsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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