1
|
Langoni H, Camargo da Silva CP, Troncarelli MZ, Tata A, Belaz KRA, Eberlin MN, Joaquim SF, Guimarães FF, Pardo RB, Gomes EN. Short communication: Identification of Corynebacterium bovis by MALDI-mass spectrometry. J Dairy Sci 2017; 100:4287-4289. [PMID: 28342611 DOI: 10.3168/jds.2016-11922] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 01/06/2017] [Indexed: 11/19/2022]
Abstract
Corynebacterium bovis is a mastitis-causing microorganism responsible for economic losses related to decrease in milk production. The aim of the study was identify Corynebacterium spp. strains recovered from milk samples of subclinical mastitis by using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). Samples were collected during a 10-mo mastitis-monitoring program in a high-production dairy farm. In this study, 80 strains were analyzed; from these 54 (67.5%) were identified at species level as Corynebacterium bovis, 24 (31.2%) isolates were identified at the genus level as Corynebacterium spp., and only 1 (1.35%) isolated had unreliable identification. Results demonstrated that MALDI-MS could be an important technique for the identification of Corynebacterium spp. in milk.
Collapse
Affiliation(s)
- Helio Langoni
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Campus de Botucatu, Distrito de Rubião Júnior s/n, Botucatu, SP 18618-970, Brazil.
| | - Carolina Polo Camargo da Silva
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Campus de Botucatu, Distrito de Rubião Júnior s/n, Botucatu, SP 18618-970, Brazil
| | | | - Alessandra Tata
- Thomson Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas, Campinas, SP 13083-859, Brazil
| | - Katia Roberta Anacleto Belaz
- Thomson Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas, Campinas, SP 13083-859, Brazil
| | - Marcos Nogueira Eberlin
- Thomson Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas, Campinas, SP 13083-859, Brazil
| | - Samea Fernandes Joaquim
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Campus de Botucatu, Distrito de Rubião Júnior s/n, Botucatu, SP 18618-970, Brazil
| | - Felipe Freitas Guimarães
- Departamento de Higiene Veterinária e Saúde Pública, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Campus de Botucatu, Distrito de Rubião Júnior s/n, Botucatu, SP 18618-970, Brazil
| | - Renata Bonini Pardo
- Faculdade de Tecnologia de Marília, Av. Castro Alves, 62 - Somenzari, Marília SP, 17500-000, Brazil
| | - Eduardo Nardini Gomes
- Departamento de Engenharia Agronômica e Engenharia de Pesca, Universidade Estadual Paulista, Campus de Registro, Avenida Nelson Brihi Badur, 430 - Vila Tupy, Registro SP, 11900-000, Brazil
| |
Collapse
|
2
|
Aranjuelo I, Cabrera-Bosquet L, Morcuende R, Avice JC, Nogués S, Araus JL, Martínez-Carrasco R, Pérez P. Does ear C sink strength contribute to overcoming photosynthetic acclimation of wheat plants exposed to elevated CO2? J Exp Bot 2011; 62:3957-69. [PMID: 21511906 PMCID: PMC3134354 DOI: 10.1093/jxb/err095] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 03/04/2011] [Accepted: 03/09/2011] [Indexed: 05/20/2023]
Abstract
Wheat plants (Triticum durum Desf., cv. Regallo) were grown in the field to study the effects of contrasting [CO(2)] conditions (700 versus 370 μmol mol(-1)) on growth, photosynthetic performance, and C management during the post-anthesis period. The aim was to test whether a restricted capacity of sink organs to utilize photosynthates drives a loss of photosynthetic capacity in elevated CO(2). The ambient (13)C/(12)C isotopic composition (δ(13)C) of air CO(2) was changed from -10.2‰ in ambient [CO(2)] to -23.6‰ under elevated [CO(2)] between the 7th and the 14th days after anthesis in order to study C assimilation and partitioning between leaves and ears. Elevated [CO(2)] had no significant effect on biomass production and grain filling, and caused an accumulation of C compounds in leaves. This was accompanied by up-regulation of phosphoglycerate mutase and ATP synthase protein content, together with down-regulation of adenosine diphosphate glucose pyrophosphatase protein. Growth in elevated [CO(2)] negatively affected Rubisco and Rubisco activase protein content and induced photosynthetic down-regulation. CO(2) enrichment caused a specific decrease in Rubisco content, together with decreases in the amino acid and total N content of leaves. The C labelling revealed that in flag leaves, part of the C fixed during grain filling was stored as starch and structural C compounds whereas the rest of the labelled C (mainly in the form of soluble sugars) was completely respired 48 h after the end of labelling. Although labelled C was not detected in the δ(13)C of ear total organic matter and respired CO(2), soluble sugar δ(13)C revealed that a small amount of labelled C reached the ear. The (12)CO(2) labelling suggests that during the beginning of post-anthesis the ear did not contribute towards overcoming flag leaf carbohydrate accumulation, and this had a consequent effect on protein expression and photosynthetic acclimation.
Collapse
Affiliation(s)
- Iker Aranjuelo
- Universidad Pública de Navarra-CSIC-Gobierno de Navarra, Campus de Arrosadia, Mutilva Baja, Spain.
| | | | | | | | | | | | | | | |
Collapse
|