Data/hora: 30/05/2024 04:24:25

Biblioteca(s): | Embrapa Meio Ambiente.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | B - 1
Data corrente: | 05/09/2022
Data da última atualização: | 05/09/2022
Autoria: | RAKOCEVIC, M.; MARCHIORI, P. E. R.; ZAMBROSI, F. C. B.; MACHADO, E. C.; MAIA, A. de H. N.; RIBEIRO, R. V.
Afiliação: | MIROSLAVA RAKOCEVIC; PAULO EDUARDO RIBEIRO MARCHIORI, UNIVERSIDADE FEDERAL DE LAVRAS; FERNANDO CESAR BACHIEGA ZAMBROSI, INSTITUTO AGRONÔMICO DE CAMPINAS; EDUARDO CARUSO MACHADO, INSTITUTO AGRONÔMICO DE CAMPINAS; ALINE DE HOLANDA NUNES MAIA, CNPMA; RAFAEL VASCONCELOS RIBEIRO, UNIVERSIDADE ESTAUDAL DE CAMPINAS.
Título: | High phosphorus supply enhances leaf gas exchange and growth of young Arabica coffee plants under water deficit.
Ano de publicação: | 2022
Fonte/Imprenta: | Experimental Agriculture, v. 58, e30, 2022.
ISSN: | 0014-4797
DOI: | https://doi.org/10.1017/S0014479722000266
Idioma: | Inglês
Conteúdo: | Abstract: Drought is considered as the major environmental stress affecting coffee production, and high phosphorus (P) supply may alleviate the drought effects on crop metabolism. Here, we hypothesized that high P supply would mitigate the impacts of drought on Arabica coffee physiology, morphology, and biomass accumulation. Potted Arabica coffee plants were grown under two P levels: the recommended P fertilization (P), and twice the recommended fertilization (+P), and two water regimes: well-watered and water withholding for 32 days. Leaf, stem, and root P concentrations were increased under +P, with plants showing higher photosynthesis and growth than the ones receiving the recommended P dose. Higher plant growth under high P supply seems to upregulate leaf photosynthesis through the source?sink relationship. Under the water deficit, the reduction of leaf photosynthesis, stomatal conductance, transpiration, water use efficiency, carboxylation efficiency, chlorophyll content, number of plagiotropic branches, plant leaf area, and vegetative biomass production was similar comparing plants fertilized with the recommended P to those supplied with +P. However, Arabica coffee trees under high P supply and water deficit presented morphological and physiological traits similar to plants under well-watered and recommended P fertilization.
Thesagro: | Biomassa; Café; Deficiência Hídrica; Fósforo; Fotossíntese; Resistência a Seca.
Thesaurus Nal: | Chlorophyll; Drought tolerance; Phosphorus fertilizers; Plant physiology; Starch; Sucrose; Water use efficiency.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (17220-1) - UPC - AP - DD -  -  -  - DIS