Balancing trade-offs: Enhanced carbon assimilation and productivity with reduced nutritional value in a well-watered C4 pasture under a warmer CO2-enriched atmosphere

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorGoiano Institute Federal (IF Goiano) at Rio Verde-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidad de O'Higgins-
Autor(es): dc.creatorHabermann, Eduardo-
Autor(es): dc.creatorDias de Oliveira, Eduardo Augusto-
Autor(es): dc.creatorBianconi, Matheus Enrique-
Autor(es): dc.creatorContin, Daniele Ribeiro-
Autor(es): dc.creatorLemos, Maria Teresa Oliverio-
Autor(es): dc.creatorCosta, João Vitor Campos Pinho-
Autor(es): dc.creatorOliveira, Kamilla Silva-
Autor(es): dc.creatorRiul, Beatriz Neroni-
Autor(es): dc.creatorBonifácio-Anacleto, Fernando-
Autor(es): dc.creatorViciedo, Dilier Olivera-
Autor(es): dc.creatorApprobato, Andressa Uehara-
Autor(es): dc.creatorAlzate-Marin, Ana Lilia-
Autor(es): dc.creatorPrado, Renato de Mello-
Autor(es): dc.creatorCosta, Katia Aparecida de Pinho-
Autor(es): dc.creatorMartinez, Carlos Alberto-
Data de aceite: dc.date.accessioned2025-08-21T19:05:33Z-
Data de disponibilização: dc.date.available2025-08-21T19:05:33Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.plaphy.2024.108408-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/302881-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/302881-
Descrição: dc.descriptionThe concentration of atmospheric CO2 and temperature are pivotal components of ecosystem productivity, carbon balance, and food security. In this study, we investigated the impacts of a warmer climate (+2 °C above ambient temperature) and an atmosphere enriched with CO2 (600 ppm) on gas exchange, antioxidant enzymatic system, growth, nutritive value, and digestibility of a well-watered, managed pasture of Megathyrsus maximus, a tropical C4 forage grass, under field conditions. Elevated [CO2] (eC) improved photosynthesis and reduced stomatal conductance, resulting in increased water use efficiency and plant C content. Under eC, stem biomass production increased without a corresponding increase in leaf biomass, leading to a smaller leaf/stem ratio. Additionally, eC had negative impacts on forage nutritive value and digestibility. Elevated temperature (eT) increased photosynthetic gains, as well as stem and leaf biomass production. However, it reduced P and K concentration, forage nutritive value, and digestibility. Under the combined conditions of eC and eT (eCeT), eT completely offset the effects of eC on the leaf/stem ratio. However, eT intensified the effects of eC on photosynthesis, leaf C concentration, biomass accumulation, and nutritive value. This resulted in a forage with 12% more acid detergent fiber content and 28% more lignin. Additionally, there was a decrease of 19% in crude protein leading to a 15% decrease in forage digestibility. These changes could potentially affect animal feeding efficiency and feedback climate change, as ruminants may experience an amplification in methane emissions. Our results highlight the critical significance of conducting multifactorial field studies when evaluating plant responses to climate change variables.-
Descrição: dc.descriptionAgência Nacional de Águas-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionMinistério da Ciência, Tecnologia e Inovação-
Descrição: dc.descriptionDepartment of Biology Ribeirão Preto School of Philosophy Science and Literature (FFCLRP) University of São Paulo, Av. Bandeirantes 3900, SP-
Descrição: dc.descriptionDepartment of Pharmaceutical Sciences Ribeirão Preto School of Pharmaceutical Sciences (FCFRP) University of São Paulo, Av. Bandeirantes 3900, SP-
Descrição: dc.descriptionGoiano Institute Federal (IF Goiano) at Rio Verde, Sul Goiana Highway, Km1, GO-
Descrição: dc.descriptionDepartment of Agricultural Science School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP), Access Road Prof. Paulo Donato Castellane No number, SP-
Descrição: dc.descriptionDepartment of Genetics Ribeirão Preto Medical School University of São Paulo, Av. Bandeirantes 3900, SP-
Descrição: dc.descriptionInstitute of Agrifood Animals and Environmental Sciences Universidad de O'Higgins-
Descrição: dc.descriptionDepartment of Agricultural Science School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP), Access Road Prof. Paulo Donato Castellane No number, SP-
Descrição: dc.descriptionFAPESP: 08/58075-8-
Descrição: dc.descriptionCNPq: 304686/2022-0-
Descrição: dc.descriptionMinistério da Ciência, Tecnologia e Inovação: 446357/2015-4-
Idioma: dc.languageen-
Relação: dc.relationPlant Physiology and Biochemistry-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCarbon allocation-
Palavras-chave: dc.subjectClimate change-
Palavras-chave: dc.subjectForage quality-
Palavras-chave: dc.subjectGas exchange-
Palavras-chave: dc.subjectMegathyrsus maximus-
Palavras-chave: dc.subjectTropical pasture-
Título: dc.titleBalancing trade-offs: Enhanced carbon assimilation and productivity with reduced nutritional value in a well-watered C4 pasture under a warmer CO2-enriched atmosphere-
Tipo de arquivo: dc.typelivro digital-
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