Consulta: subjectFacets:"Trehalose"
Registros recuperados: 10
Data/hora: 11/06/2024 08:15:38

Physiological and Metabolic Responses of Freshwater and Brackish-Water Strains of   Microcystis aeruginosa   Acclimated to a Salinity Gradient: Insight into Salt Tolerance
Provedor de dados: 5
Autores: Georges Des Aulnois, Maxime; Roux, Pauline; Caruana, Amandine; Réveillon, Damien; Briand, Enora; Hervé, Fabienne; Savar, Veronique; Bormans, Myriam; Amzil, Zouher; Atomi, Haruyuki.
Proliferation of microcystin (MC)-producing Microcystis aeruginosa in brackish waters has been described in several locations and represents a new concern for public and environmental health. While the impact of a sudden salinity increase on M. aeruginosa physiology has been studied, less is known about the mechanisms involved in salt tolerance after acclimation. This study aims to compare the physiological responses of two strains of M. aeruginosa (PCC 7820 and PCC 7806), which were isolated from contrasted environments, to increasing salinities. After acclimation, growth and MC production rates were determined and metabolomic analyses were conducted. For both strains, salinity decreased the biovolume, growth, and MC production rates and induced the...
Tipo: Text
Palavras-chave: Acclimation; Metabolomic; Microcystis; Salinity; Sucrose; Trehalose; Ecophysiology.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70031/68012.pdf

Changes in trehalose content of baker's yeast as affected by octanoic acid
Provedor de dados: 63
Autores: Gutierrez,L.E.
Octanoic acid inhibited ethanolic fermentation by Saccharomyces cerevisiae (bakers yeast) and the trehalose accumulation, however did not affect the endogenous degradation of trehalose. This inhibition may be explained by the binding of octanoic acid to hexokinase or other proteins of plasma membrane because they are not necessary for endogenous fermentation. The degradation of trehalose may be due to an activation of trehalase.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trehalose; Yeast; Saccharomyces; Octanoic acid.
Ano: 1993
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161993000300020

Biochemical and physiological responses of sugarcane cultivars to soil water deficiencies
Provedor de dados: 63
Autores: Queiroz,Rafaela Josemara Barbosa; Santos,Durvalina Maria Mathias dos; Ferraudo,Antonio Sergio; Carlin,Samira Domingues; Silva,Marcelo de Almeida.
For sugarcane (Saccharum spp.) crops, the effects of an environmental stress, especially water deficiency, may cause severe productivity reduction, inferring negatively in the sugarcane industry. The tolerance of two sugarcane cultivars to a lack of water was made by analyzing the levels of the osmoprotectors, trehalose and free proline, and the biometrical variables of their initial growth. Biochemical and physiological responses of the cultivars, when subjected to water stress, were assayed to determine how these plants tolerate drought. The study was conducted in an acclimatized greenhouse (29.7 ± 4.3ºC and 75.0 ± 10.1% relative humidity) during 100 days and was divided into random blocks using a factorial 2 × 3 × 2 design (sugarcane cultivars × water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp; Drought; Trehalose; Proline; Initial growth.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400012

Improving drought tolerance of quinoa plant by foliar treatment of trehalose
Provedor de dados: 111
Autores: Dawood, Mona Gergis.
Two field experiments were conducted during two successive seasons (2014/2015 and 2015/2016) at the Experimental Station of National Research Centre, Nubaria district, Beheira Governorate, Egypt, to study the effect of foliar treatment of quinoa plants with trehalose (Tre) (100µM and 500µM) on growth, photosynthetic pigments, seed yield quantity &amp; quality, in fever of nutritional and antioxidant compounds in the yielded quinoa seeds which subjected to water deficiency (skipping two irrigation times at 50 &amp; 60 days after sowing). Water deficiency caused marked decreases in quinoa plant growth parameters (shoot height, fresh and dry weights of shoot/plant) and photosynthetic pigments with marked increases in root growth parameters (root length, fresh...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Drought; Flavonoids; Oil; Phenolics; Protein; Quinoa; Trehalose.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4539

Thermostabilisation of human serum butyrylcholinesterase for detection of its inhibitors in water and biological fluids
Provedor de dados: 52
Autores: Jaganathan,Lakshmanan; Boopathy,Rathanam.
The ability of gelatine-trehalose to convert the normally fragile, dry human serum BChE into a thermostable enzyme and its use in the detection of cholinesterase inhibitors in water and biological fluids is described. Gelatine or trehalose alone is unable to protect the dry enzyme against exposure to high temperature, while a combination of gelatine and trehalose were able to protect the enzyme activity against prolonged exposure to temperature as high as +50°C. A method for rapid, simple and inexpensive means of screening for cholinesterase inhibitors such as carbamates and organophosphates in water, vegetables and human blood has been developed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Butyrylcholinesterase; Carbamates; Cholinesterase; Gelatine; Organophosphorus; Trehalose.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000300012

Shared control of maltose and trehalose utilization in Candida utilis
Provedor de dados: 56
Autores: Rolim,M.F.; de Araujo,P.S.; Panek,A.D.; Paschoalin,V.M.F.; Silva,J.T.
Trehalose biosynthesis and its hydrolysis have been extensively studied in yeast, but few reports have addressed the catabolism of exogenously supplied trehalose. Here we report the catabolism of exogenous trehalose by Candida utilis. In contrast to the biphasic growth in glucose, the growth of C. utilis in a mineral medium with trehalose as the sole carbon and energy source is aerobic and exhibits the Kluyver effect. Trehalose is transported into the cell by an inducible trehalose transporter (K M of 8 mM and V MAX of 1.8 µmol trehalose min-1 mg cell (dry weight)-1. The activity of the trehalose transporter is high in cells growing in media containing trehalose or maltose and very low or absent during the growth in glucose or glycerol. Similarly, total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trehalose; Trehalase; Sugar transporter; Candida utilis; Yeast.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000700002

Trehalose accumulation, invertase activity and physiological characteristics of yeasts isolated from 24 h fermentative cycles during the production of artisanal Brazilian cachaça
Provedor de dados: 58
Autores: Pataro,Carla; Guerra,Juliana B.; Gomes,Fátima C.O.; Neves,Maria J.; Pimentel,Patrícia F.; Rosa,Carlos A.
Trehalose accumulation, invertase activity and physiological characteristics of 86 yeast isolates from short fermentative cycles during the production of cachaça in three artisanal distilleries of the State of Minas Gerais were studied. Among these isolates, 70% were able to grow at temperatures between 40 and 42ºC. Only Saccharomyces cerevisiae isolates were able to grow over 40ºC. Lower temperatures (&lt;40ºC) favoured the growth of yeasts such as Candida parapsilosis-like, C. maltosa-like, Kloeckera japonica, S. exiguus and C. bombicola-like. The isolates from all three distilleries were ethanol tolerant, produced invertase, and accumulate trehalose in the presence of glucose. The strains isolated from distillery A presented more resistance to ethanol...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharomyces cerevisiae; Cachaça; Trehalose; Invertase; Fermentation.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000300003

Effect of the trehalose levels on the screening of yeast as probiotic by in vivo and in vitro assays
Provedor de dados: 58
Autores: Martins,Flaviano S.; Miranda,Ieso C.; Rosa,Carlos A.; Nicoli,Jacques R.; Neves,Maria J.
Probiotics are viable defined microorganisms (bacteria or yeasts) that exert a beneficial effect on the health of the host when ingested in adequate amounts. Screening for such biotherapeutic agents is commonly performed by in vitro assays simulating gastrointestinal environment to determine the ability to survive in the digestive tract. In the present study, the possibility of extrapolation of data obtained in in vitro assays to in vivo conditions was studied using five Saccharomyces cerevisiae strains isolated from Brazilian Atlantic rain forest. Trehalose contents and survival after exposure to a combination of physiological stresses generally found in the gastrointestinal tract of humans were determined for the five yeasts and compared to the behavior...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Probiotic; Saccharomyces boulardii; Saccharomyces cerevisiae; Stress; Trehalose.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000100012

Microorganisms associated to tomato seedlings growing in saline culture act as osmoprotectant
Provedor de dados: 58
Autores: Cortés-Jiménez,Daniel; Gómez-Guzmán,Abril; Iturriaga,Gabriel; Suárez,Ramón; Montero Alpírez,Gisela; M.E. Escalante,Froylán.
Less than 0.5% of total water in the world is available for human consumption and agriculture. The major part of the world's water is saline and salinity in soils interferes in germination of seeds and the posterior development of the plant. In order to increase the osmotolerance of tomato, seedlings were associated with Azospirillum brasilense Cd, Azospirillum brasilense Cd transformed bacteria with a plasmid harboring a trehalose biosynthesis gene-fusion or Chlorella vulgaris. Two plant culture media: Hydroponic and Murashige and Skoog were tested. In the first set of studies seedlings were associated to single free cells meanwhile in a second set single and combined free cells were studied. A positive interaction between transformed Azospirillum and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydroponic culture; Microbial association; Salt tolerance; Trehalose.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200032

Mobilization of endogenous glycogen and trehalose of industrial yeasts
Provedor de dados: 58
Autores: Paulillo,Silene Cristina de Lima; Yokoya,Fumio; Basso,Luiz Carlos.
The fermentation of yeast reserve carbohydrates, glycogen and trehalose is a procedure to increase protein level of yeast cells and improve ethanol production. This work studied on the degradation kinetics of glycogen and trehalose carried out with two industrial strains of Saccharomyces cerevisiae (PE-2 and SA-1) and the effect of different temperatures (38º, 40º, 42º and 44ºC) on degradation rate. Endogenous fermentation was carried out in a yeast suspension at 20% (w/v) based on wet weight, suspended in fermented media with 3.0 to 4.5 % (v/v) of ethanol. The degradation of the carbohydrate reserves at 40ºC followed first-order kinetics, showing that its rate is mainly dependent on the carbohydrate concentration in the cell. The degradation rate (k)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharomyces cerevisiae; Glycogen; Trehalose; Yeast; Fermentation.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000300014