Diurnal photosynthesis, water use efficiency and light use efficiency of wheat under Mediterranean field conditions

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dc.authorscopusid6602148086
dc.authorscopusid55389996900
dc.authorscopusid58349393900
dc.contributor.authorEvrendilek, Fatih
dc.contributor.authorAsher, Jiftah Ben
dc.contributor.authorAydin, Mehmet
dc.date.accessioned2024-09-19T15:48:38Z
dc.date.available2024-09-19T15:48:38Z
dc.date.issued2008
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractPhotosynthesis and transpiration rates of wheat leaves (Triticum aestivum L.) were measured at 30 min intervals under Mediterranean field conditions, using Photosynthesis Monitor system (PM-48M). The dynamics of net photosynthetic rate (PN), transpiration rate (ET), water use efficiency (WUE), light use efficiency (LUE), stomatal conductance (gs), photosynthetically active radiation (PAR), air temperature (T), relative humidity (RH), and atmospheric CO2 concentration (Catm) were quantified at five rainfed wheat sites with the same stages of development (midflowering) along south-to-north and east-to-west transects for eight days in April. Diurnal PN (3.6 to 6.6 ?mol m-2 s -1), PAR (392 to 564 ?mol m-2 sec-1), LUE (0.006 to 0.015) and WUE (0.0001 to 0.011) did not vary significantly across all five wheat sites (p>0.05). PN and ET were strongly coupled and highly correlated with PAR (p<0.001). Best multiple linear regression (MLR) models accounted for 92% of variations in PN as a function of PAR and ET, and 90% in ET as a function of PAR and RH (p<0.001). PN exhibited a peak at mid-morning, and a photosynthetic midday depression under the limiting effects of high evaporative demand. Diurnal variations in WUE and LUE showed a bimodal behavior with the maximum values in early morning and late afternoon. As the impacts of global climate change become increasingly felt, continuous measurements of climate-crop-soil-management interactions under natural conditions play a pivotal role not only in exploring changes in ecophysiological properties of strategic crops for food security such as wheat but also in devising preventive and mitigative management practices to ensure sustained agricultural productivity. © Triveni Enterprises.en_US
dc.identifier.endpage406en_US
dc.identifier.issn0254-8704
dc.identifier.issue3en_US
dc.identifier.pmid18972699en_US
dc.identifier.scopus2-s2.0-45149105195en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage397en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12483/15213
dc.identifier.volume29en_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherTriveni Enterprisesen_US
dc.relation.ispartofJournal of Environmental Biologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectLight use efficiencyen_US
dc.subjectPhotosynthesisen_US
dc.subjectTranspirationen_US
dc.subjectWater use efficiencyen_US
dc.subjectWheaten_US
dc.titleDiurnal photosynthesis, water use efficiency and light use efficiency of wheat under Mediterranean field conditionsen_US
dc.typeArticleen_US

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