Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season

dc.contributor.authorPatankar, Rajit
dc.contributor.authorMortazavi, Behzad
dc.contributor.authorOberbauer, Steven F.
dc.contributor.authorStarr, Gregory
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherDauphin Island Sea Lab
dc.contributor.otherFlorida International University
dc.date.accessioned2023-10-02T15:18:14Z
dc.date.available2023-10-02T15:18:14Z
dc.date.issued2013
dc.description.abstractArctic tundra plant communities are subject to a short growing season that is the primary period in which carbon is sequestered for growth and survival. This period is often characterized by 24-h photoperiods for several months a year. To compensate for the short growing season tundra plants may extend their carbon uptake capacity on a diurnal basis, but whether this is true remains unknown. Here, we examined in situ diurnal patterns of physiological activity and foliar metabolites during the early, mid, and late growing season in seven arctic species under light-saturated conditions. We found clear diurnal patterns in photosynthesis and respiration, with midday peaks and midnight lulls indicative of circadian regulation. Diurnal patterns in foliar metabolite concentrations were less distinct between the species and across seasons, suggesting that metabolic pools are likely governed by proximate external factors. This understanding of diurnal physiology will also enhance the parameterization of process-based models, which will aid in better predicting future carbon dynamics for the tundra. This becomes even more critical considering the rapid changes that are occurring circumpolarly that are altering plant community structure, function, and ultimately regional and global carbon budgets.en_US
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.citationPatankar, R., Mortazavi, B., Oberbauer, S. F., & Starr, G. (2013). Diurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing season. In Ecology and Evolution (Vol. 3, Issue 2, pp. 375–388). Wiley. https://doi.org/10.1002/ece3.467
dc.identifier.doi10.1002/ece3.467
dc.identifier.orcidhttps://orcid.org/0000-0002-1912-1940
dc.identifier.orcidhttps://orcid.org/0000-0002-1912-1940
dc.identifier.urihttps://ir.ua.edu/handle/123456789/12616
dc.languageEnglish
dc.language.isoen_US
dc.publisherWiley
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAlaska
dc.subjectcircadian clock
dc.subjectphotoperiod
dc.subjectphotosynthesis
dc.subjectrespiration
dc.subjectsugars
dc.subjecttotal nonstructural carbohydrates
dc.subjecttussock tundra
dc.subjectCLIMATE-CHANGE
dc.subjectSTOMATAL CONDUCTANCE
dc.subjectCIRCADIAN-RHYTHMS
dc.subjectLEAF SENESCENCE
dc.subjectCARBON
dc.subjectPHOTOSYNTHESIS
dc.subjectGROWTH
dc.subjectALASKA
dc.subjectEVERGREENS
dc.subjectFRACTIONS
dc.subjectEcology
dc.subjectEvolutionary Biology
dc.titleDiurnal patterns of gas-exchange and metabolic pools in tundra plants during three phases of the arctic growing seasonen_US
dc.typeArticle
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