402 documents found, page 1 of 41
Bacterial dynamics and exchange in plant-insect interactions
Cameirão, Cristina; Pereira, José Alberto; Tavares, Rui; Lino-Neto, Teresa; Baptista, PaulaIn nature, plants and insects engage in intricate interactions. Despite the increasing knowledge of the microbiomes of plants and insects, the extent to which they exchange and alter each other’s microbiomes remains unclear. In this work, the bacterial community associated with nymphs of Philaenus spumarius (Hemiptera: Aphrophoridae), the stems of Coleostephus myconis where the nymphs were feeding, and the foam...
Production of nondairy fermented products with chestnut puree as substrate and ...
Afonso, Maria João A.P.S.; Ramalhosa, Elsa; Del Río, Pablo G.; Martins, Fátima; Baptista, Paula; Pereira, Ermelinda; Guerra, Nelson P.This work aimed to study the production, for the first time, of three fermented products of chestnut puree (CP) withmilk kefir grains, a higher nisin-producing (Lactococcus (L.) lactis CECT 539) and a higher lactic acid-producing (Lactobacillus (Lb.) casei CECT 4043) lactic acid bacteria (LAB). After studying the CP rheology, the ability of the two LAB to assimilate the carbon sources (starch, sucrose, glucose,...
Carob and pomegranate extracts enhance plant defence mechanisms against olive a...
Antón-Domínguez, Begoña I.; Sánchez-Pereira, Luiza; Lamas, Sandra; Rodrigues, Nuno; Baptista, Paula; Agustí-Brisach, CarlosOlive anthracnose (OA), caused by Colletotrichum species, is one of the most economically damaging disease in olive sector. This study was focused to identify sustainable control alternatives by evaluating the effect of pomegranate and carob extracts against OA and elucidating their mode of action. In vitro assays on mycelial growth, conidial production, and germination, and appressoria formation of C. godetiae...
Seasonal olfactory response of Philaenus spumarius (Hemiptera: Aphrophoridae) t...
Rodrigues, Isabel; Benhadi-Marín, Jacinto; Rodrigues, Nuno; Baptista, Paula; Pereira, José AlbertoIn Portugal, the strength of the olive sector relies on the great genetic heritage of traditional olive cultivars. However, this genetic heritage is threatened by the causal agent of olive quick decline syndrome (OQDS), the phytopathogenic bacteria Xylella fastidiosa, reported for the first time in 2019 in the country. This vector-borne pathogen is transmitted by xylem-feeding insects such as Philaenus spumariu...
Metagenomic analysis of the effects of plant- and yeast-based formulations on t...
Monteiro, Eliana; Baptista, Paula; Silva, Sofia; Carvalho, Márcia; Bragança, Radek; Guinan, Kieran J.; Sujeeth, Neerakkal; Cortez, IsabelGrapevine is highly susceptible to fungal diseases such as downy mildew and powdery mildew, which are traditionally managed through the intensive use of chemical fungicides. However, in the context of increasingly sustainable viticulture, biofungicides derived from plant and yeast extracts are gaining attention. Despite this, their impact on the grapevine leaf microbiome, crucial for plant health and disease re...
Nutritional and health claims compliance of olive oils produced from centenaria...
Bortoluzzi, Leticia; Casal, Susana; Cruz, Rebeca; Peres, António M.; Baptista, Paula; Rodrigues, NunoThis work examined whether centenarian trees could be a source of virgin olive oil (VOO) that accomplishes nutritional and health claims regarding unsaturated fatty acids (UFA), tocopherols and phenolic compounds (tyrosol and hydroxytyrosol derivatives). A total of 159 VOOs from centenarian trees of Côa Valley-Portugal were analysed to assess their compliance with those claims. All VOOs met the criteria for ‘hi...
Exogenous systemin peptide treatment in olive alters Bactrocera oleae ovipositi...
Sánchez, Luiza; Cunha, Ana E.; Rodrigues, Nuno; Pereira, José Alberto; Baptista, PaulaThe olive fruit fly, Bactrocera oleae (Rossi), is a key pest of the olive crop, whose control relies mostly on the use of insecticides. Plant peptides may represent a more environmentally-friendly tool to manage olive fly, due to their recognized role to activate and/or prime plant defence responses against pests. In this work, behavioural experiments (no-choice and two-choice) and analysis of volatile compound...
Effect of the cleaning and disinfection methods on the hygienic conditions of f...
Martins, Fátima; Rodrigues, Nuno; Pereira, J.A.; Baptista, Paula; Ramalhosa, ElsaThis study aimed to evaluate and identify the microbial community attached to the surfaces of fermenter tanks used in table olive Negrinha de Freixo cultivar processing through molecular analysis and verify if the cleaning/ disinfection was done correctly. Four fermentation tanks previously used in table olive processing were sampled at three different inside areas: upper, middle, and lower. Before sampling, fo...
Exogenous systemin peptide treatment in olive alters Bactrocera oleae ovipositi...
Sánchez, Luiza; Cunha, Ana E.; Rodrigues, Nuno; Pereira, J.A.; Baptista, PaulaThe olive fruit fly, Bactrocera oleae (Rossi), is a key pest of the olive crop, whose control relies mostly on the use of insecticides. Plant peptides may represent a more environmentally-friendly tool to manage olive fly, due to their recognized role to activate and/or prime plant defence responses against pests. In this work, behavioural experiments (no-choice and two-choice) and analysis of volatile compound...
Diversity, Composition, and Specificity of the Philaenus spumarius Bacteriome
Cameirão, Cristina; Costa, Daniela; Rufino, José; Pereira, J.A.; Lino-Neto, Teresa; Baptista, PaulaPhilaenus spumarius (Linnaeus, 1758) (Hemiptera, Aphrophoridae) was recently classified as a pest due to its ability to act as a vector of the phytopathogen Xylella fastidiosa. This insect has been reported to harbour several symbiotic bacteria that play essential roles in P. spumarius health and fitness. However, the factors driving bacterial assemblages remain largely unexplored. Here, the bacteriome associat...