Santos, M.I.S.; Martins, S.R.; Pedroso, L.; Sousa, I.; Ferreira, M.A.S.S.
Abou-Mansour, Eliane; Débieux, Jean-Luc; Ramírez-Suero, Montserrat; Bénard-Gellon, Mélanie; Magnin-Robert, Maryline; Spagnolo, Alessandro; Chong, Julie; Farine, Sibylle; Bertsch, Christophe; L'Haridon, Floriane; Serrano, Mario; Fontaine, Florence; Rego, Cecilia; Larignon, Philippe
Liquid chromatography-diode array screening of the organic extract of the cultures of 13 isolates of the
fungus Neofusicoccum parvum, the main causal agent of botryosphaeria dieback of grapevine, showed
similar metabolites. One strain was selected for further chemical studies and led to the isolation and
characterisation of 13 metabolites. Structures were elucidated through spectroscopic analyses, including
one- and two-dimensional NMR and mass spectrometry, and through comparison to literature data. The
isolated compounds belong to four different chemical families: five metabolites, namely, ( )-terremutin
(1), (+)-terremutin hydrate (2), (+)-epi-sphaeropsidone (3) ( )-4-chloro-terremutin hydrate (4) and(+)-4-
hydroxysuccinate-terremutin hydrate (5), belong to the family of dihydrotoluquinones; two metabolites,
namely, (6S,7R) asperlin...
Danalache, Florina; Mata, Paulina; Martins, Margarida Moldão; Alves, Vitor D.
This work aimed the development of mango bars, made with fresh mango puree and gellan gum. The
influence of gellan concentration as well as the ratio of LA (low-acyl) and HA (high-acyl) gellan on the
rheological and microstructural properties of the mango bars was studied. Rheological outcomes showed
that both LA and HA, and in mixtures, were able to produce jellified products, within a rather low
maturation time. Furthermore, a synergistic effect was observed at different ratios of LA/HA, enabling the
production of mango bars with intermediate viscoelastic properties. Higher values of the dynamic
moduli were perceived as the LA content increased. Confocal microscopy is in...
Paredes, P.; Wei, Z.; Liu, Y.; Xu, D.; Xin, Y.; Zhang, B.; Pereira, L.S.
tFour years of soybean experimental data observed at Daxing, North China Plain, were used to assess theability of the AquaCrop model to predict soybean final biomass and yield. The model was parameterizedand calibrated using field data on leaf area index (LAI), available soil water, soil evaporation, biomass andfinal yield data. The model was assessed using calibrated and default parameters. Data on LAI were usedto derive the fraction of ground cover and to calibrate the green canopy cover (CC) curve. An accurate cal-ibration of the CC curve was performed, with low root mean square errors (RMSE < 7.3%). Results relativeto soil...
González, Maria G.; Ramos, Tiago B.; Carlesso, Reimar; Paredes, Paula; Petry, Mirta T.; Martins, Juliano D.; Aires, Núbia P.; Pereira, L.S.
Gama, Florinda; Saavedra, Teresa; Díaz, Isabel; Campillo, Maria del Carmen; Varennes, Amarilis de; Duarte, Amílcar; Pestana, Maribela; Correia, José Pedro
tThe absence of iron (Fe) in the nutrient solution induces several physiological and morphological adapta-tions in the roots of Poncirus trifoliata, a citrus rootstock, thereby modifying its overall nutritional status.Whether these changes are advantageous when plants are transplanted to calcareous soils needs to beassessed. To achieve this objective a two-phase experiment was established, first in nutrient solution(phase I) then in pots containing different soils (phase II). In phase I, P. trifoliata L. Raf. plants were grownin Hoagland’s solution with 120 M of Fe (Fe120 treatment) or without (Fe0 treatment). At the end ofphase I (87 days), Fe-chlorotic plants had less...
Oliveira, Ana; Alexandre, Elisabete M.C.; Coelho, Marta; Gomes, Maria Helena; Almeida, Domingos P.F.; Pintado, Manuela
The minimum loss of processed fruit nutritional quality must been guaranteed during storage and the
atmosphere can be a limiting step.
Strawberry pur ees flushed with gas mixtures: 10 kPa O2 þ 90 kPa N2, 100 kPa N2 and air (78 kPa
N2 þ 21 kPa O2 þ 0.03 kPa CO2) were stored for 90 days at 4 and 23 C and revealed no effect in total
antioxidant activity and in total phenolic content. The compounds (þ)-catechin, ( )-epicatechin and
quercetin-3-rutinoside were not affected by the atmospheres for both temperatures and ellagic acid was
the exception within strawberry phytochemicals, where its concentration was higher for samples...
Rodrigo, Isabel; Cristovão, Artur; Tibério, Manuel Luís; Baptista, Alberto; Maggione, Lara; Pires, Miguel
Study developed under the Rural Natework Project “Observatório de sistemas de produção localizados e valorização de produtos locais; Identificação, análise e divulgação de boas práticas de comercialização e valorização de produtos agro-alimentares tradicionais” (PNRR: PA 0400157-58-59)
Aybar, Vanessa E.; Melo-Abreu, J.P.; Searles, Peter S.; Matias, Angel C.; Del Rio, Carmen; Caballero, Juan M.; Rousseaux, M.Cecilia
Viegas, Inês; Santos, José Manuel Lima; Fontes, Magda Aguiar
Nas economias desenvolvidas, a segurança dos alimentos, o bem‑estar animal e o ambiente têm vindo a assumir relevância nas preocupações dos consumidores. Procurámos saber, através da metodologia dos grupos de discussão (focus groups) realizados em duas cidades de Portugal, Lisboa e Porto, as preocupações e perceções dos consumidores relativamente a estes atributos, os quais são essencialmente acreditados. Este conhecimento é fundamental para a aplicação posterior de métodos de preferências declaradas. Foi ainda possível obter, com base em exercícios de seleção entre carnes diferenciadas, e através de um modelo logit, intervalos de preços passíveis de serem utilizados posteriormente na definição de...
Domingos, Sara; Fino, Joana; Cardoso, Vânia; Sánchez, Claudia; Ramalho, José C.; Larcher, Roberto; Paulo, Octávio S.; Oliveira, Cristina M.; Goulão, Luis F.
Payer, R.; Figueiredo, E.; Mexia, A.
To evaluate an eventual parasitism and/or predation behaviour of the eulophid parasitoid Diglyphus isaea
(Walker, 1838) on Tuta absoluta (Meyrick, 1917) larvae two assays were performed releasing adult parasitoids. The
first assay was conducted in Petri dishes using tomato leaflets havig mines with T. absoluta larvae inside. The
second, was performed on previously infested potted tomato plants. In both assays no parasitism but only predation
was found. Predation was observed, mainly on L2 and L3 larvae which had moulted. Proportion of clearly preyed
larvae reached 17% in Petri dishes and 38% in potted plants. Predation was attested by the presence of punctures
done by the oviscapt...