Physiological responses of pepper (Capsicum annum) to combined ozone and pathogen stress

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dc.contributor.authorModelski, Collinen
dc.contributor.authorPotnis, Nehaen
dc.contributor.authorSanz-Saez, Alvaroen
dc.contributor.authorLeisner, Courtney P.en
dc.date.accessioned2025-01-16T17:38:02Zen
dc.date.available2025-01-16T17:38:02Zen
dc.date.issued2024-06-24en
dc.description.abstractTropospheric ozone [O3] is a secondary air pollutant formed from the photochemical oxidation of volatile organic compounds in the presence of nitrogen oxides, and it is one of the most damaging air pollutants to crops. O3 entry into the plant generates reactive oxygen species leading to cellular damage and oxidative stress, leading to decreased primary production and yield. Increased O3 exposure has also been shown to have secondary impacts on plants by altering the incidence and response to plant pathogens. We used the Capsicum annum (pepper)-Xanthomonas perforans pathosystem to investigate the impact of elevated O3 (eO3) on plants with and without exposure to Xanthomonas, using a disease-susceptible and disease-resistant pepper cultivar. Gas exchange measurements revealed decreases in diurnal photosynthetic rate (A′) and stomatal conductance ((Formula presented.)), and maximum rate of electron transport (Jmax) in the disease-resistant cultivar, but no decrease in the disease-susceptible cultivar in eO3, regardless of Xanthomonas presence. Maximum rates of carboxylation (Vc,max), midday A and gs rates at the middle canopy, and decreases in aboveground biomass were negatively affected by eO3 in both cultivars. We also observed a decrease in stomatal sluggishness as measured through the Ball–Berry–Woodrow model in all treatments in the disease-resistant cultivar. We hypothesize that the mechanism conferring disease resistance to Xanthomonas in pepper also renders the plant less tolerant to eO3 stress through changes in stomatal responsiveness. Findings from this study help expand our understanding of the trade-off of disease resistance with abiotic stresses imposed by future climate change.en
dc.description.versionSubmitted versionen
dc.format.extentPages 1830-1843en
dc.format.extent14 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1111/tpj.16888en
dc.identifier.eissn1365-313Xen
dc.identifier.issn0960-7412en
dc.identifier.issue4en
dc.identifier.pmid38924220en
dc.identifier.urihttps://hdl.handle.net/10919/124225en
dc.identifier.volume119en
dc.language.isoenen
dc.publisherWileyen
dc.relation.urihttps://www.ncbi.nlm.nih.gov/pubmed/38924220en
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectozoneen
dc.subjectpathogen stressen
dc.subjectphysiologyen
dc.subjectpepperen
dc.subjectstomatal conductanceen
dc.subject.meshXanthomonasen
dc.subject.meshCapsicumen
dc.subject.meshOzoneen
dc.subject.meshPhotosynthesisen
dc.subject.meshPlant Diseasesen
dc.subject.meshStress, Physiologicalen
dc.subject.meshDisease Resistanceen
dc.titlePhysiological responses of pepper (<i>Capsicum annum</i>) to combined ozone and pathogen stressen
dc.title.serialPlant Journalen
dc.typeArticleen
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
dcterms.dateAccepted2024-06-05en
pubs.organisational-groupVirginia Techen
pubs.organisational-groupVirginia Tech/Agriculture & Life Sciencesen
pubs.organisational-groupVirginia Tech/All T&R Facultyen
pubs.organisational-groupVirginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen
pubs.organisational-groupVirginia Tech/Agriculture & Life Sciences/School of Plant and Environmental Sciencesen

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