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dc.contributor.authorBourgault, Maryse
dc.contributor.authorTausz-Posch, Sabine
dc.contributor.authorGreenwood, Mark
dc.contributor.authorLöw, Markus
dc.contributor.authorHenty, Samuel
dc.contributor.authorArmstrong, Roger D.
dc.contributor.authorO’Leary, Garry L.
dc.contributor.authorFitzgerald, Glenn J.
dc.contributor.authorTausz, Michael
dc.identifier.citationBourgault, M.; Tausz-Posch, S.; Greenwood, M.; Löw, M.; Henty, S.; Armstrong, R.D.; O’Leary, G.L.; Fitzgerald, G.J.; Tausz, M. Does Elevated [CO2] Only Increase Root Growth in the Topsoil? A FACE Study with Lentil in a Semi-Arid Environment. Plants 2021, 10, 612. plants10040612en_US
dc.description© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
dc.description.abstractAtmospheric carbon dioxide concentrations [CO2] are increasing steadily. Some reports have shown that root growth in grain crops is mostly stimulated in the topsoil rather than evenly throughout the soil profile by e[CO2], which is not optimal for crops grown in semi-arid environments with strong reliance on stored water. An experiment was conducted during the 2014 and 2015 growing seasons with two lentil (Lens culinaris) genotypes grown under Free Air CO2 Enrichment (FACE) in which root growth was observed non-destructively with mini-rhizotrons approximately every 2–3 weeks. Root growth was not always statistically increased by e[CO2] and not consistently between depths and genotypes. In 2014, root growth in the top 15 cm of the soil profile (topsoil) was indeed increased by e[CO2], but increases at lower depths (30–45 cm) later in the season were greater than in the topsoil. In 2015, e[CO2] only increased root length in the topsoil for one genotype, potentially reflecting the lack of plant available soil water between 30–60 cm until recharged by irrigation during grain filling. Our limited data to compare responses to e[CO2] showed that root length increases in the topsoil were correlated with a lower yield response to e[CO2]. The increase in yield response was rather correlated with increases in root growth below 30 cm depth.en_US
dc.subjectlens culinarisen_US
dc.subjectclimate change adaptationen_US
dc.subjectroot developmenten_US
dc.subjectroot depth distributionen_US
dc.titleDoes Elevated [CO2] Only Increase Root Growth in the Topsoil? A FACE Study with Lentil in a Semi-Arid Environmenten_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.departmentResearch Centers.en_US
mus.relation.universityMontana State University - Bozemanen_US

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