|
|
|
| Registros recuperados: 13 | |
|
| |
|
|
| Specian,Vânia; Sarragiotto,Maria Helena; Pamphile,João Alencar; Clemente,Edmar. |
| Endophytic microorganisms, defined as fungi or bacteria that colonize the interior of plants without causing any immediate negative effects or damages, have reciprocal relationships with host plants. In some cases their presence is beneficial to the host due to the synthesis of bioactive compounds, among which several alcohols, esters, ketones and others that may react with other compounds and may be lethal to pathogenic microorganisms. Diaporthe helianthi (Phomopsis helianthi in its anamorphic phase) is available worldwide, especially in Europe, Asia and America. Isolated in Europe as an agent of the sunflower stem cancer, it has also been endophytically isolated from tropical and temperate plants. A D. helianthi strain isolated from Luehea divaricata has... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic fungi; Diaporthe helianthi; Secondary metabolite; Phenolic compound; Tyrosol. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300045 |
| |
|
|
| 豊留, 孝仁; TOYOTOME, Takahito. |
| Aspergillus species (spp.) are medically important pathogens that cause aspergillosis, and A. fumigatus is the most prevalent causative agent of the disease. Aspergillus spp. produce various secondary metabolites; however, the role of these metabolites in aspergillosis remains unclear. Gliotoxin is a major secondary metabolite produced by A. fumigatus. Several recent studies have reported that gliotoxin contributes to the virulence of A. fumigatus. Here I review studies related to gliotoxin and its contribution to the infection caused by A. fumigatus. |
|
Palavras-chave: Aspergillosis; Aspergillus fumigatus; Gliotoxin; Secondary metabolite. |
| Ano: 2015 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4157 |
| |
|
|
| SILVA,PAULO LUIZ DA; CORDEIRO,GLÁUCIA; SILVA,CAROLINA R. DA; BARROS,RAFAEL A.; SILVA,CAMILA R. DA; ZANUNCIO,JOSÉ C.; CAMPOS,WELLINGTON G.; OLIVEIRA,MARIA G.A.. |
| Abstract The response of plants to grazing includes the production of chemical defense compounds such as proteases inhibitors and secondary metabolites as flavonoids, which makes them less palatable to feeding and negatively affecting the physiology of insects. The aim of this study was to evaluate the phytochemical response of soybean cultivars (Glycine max (L.) Merrill) resistant (IAC-17, IAC-24) and susceptible (IAC-P1) to insects after mechanical damage. These cultivars were mechanically injured, and after 24 hours samples of these plants were analyzed by HPLC to identify and quantify flavonoids. The flavonoids daidzein, quercetin, and rutin were quantified, with the highest concentration of daidzin in soybean cultivars after mechanical damage. Rutin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Flavonoid; Herbivory; Mechanical damage; Secondary metabolite. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703415 |
| |
|
| |
|
|
| MARINHO,KETSIA S.N.; ANTONIO,ERIVALDO A.; SILVA,CAMILLA V.N.S.; SILVA,KEILA T. DA; TEIXEIRA,VALÉRIA W.; AGUIAR JUNIOR,FRANCISCO C.A. DE; SANTOS,KATHARINE R.P. DOS; SILVA,NICÁCIO H. DA; SANTOS,NOEMIA P.S.. |
| ABSTRACT This study aimed to evaluate the teratogenic and hepatotoxic potential of the usnic acid encapsulated into PLGA-microspheres. In total, 12 female Wistar rats in pregnancy were randomly distributed in the control group (n= 6) that received 1.0 mL of physiological solution and treatment group (n= 6) that received 25 mg/kg of encapsulated usnic acid by oral administration. All females were euthanized at day 20 of pregnancy and their fetuses were removed and analyzed. During the pregnancy was observed a reduction in weight gain. There was no difference in serum transaminases levels analyzed as well as any difference in liver weight in both groups. The histomorphometric analysis of the liver from the treatment group revealed an increase in number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Encapsulation; Fetotoxicity; Hepatotoxicity; Secondary metabolite. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301073 |
| |
|
|
| Cetin,Emine Sema. |
| BACKGROUND: The aim of the present work was to examine the role of UV-C irradiation on the production of secondary metabolites (total phenolic, total flavanols, total flavonols, catechin, ferulic acid and trans-resveratrol in phenolic compounds and α-, β-, γ- δ-tocopherols) in callus cultures. Studies on the effects of UV-C treatment on callus culture are seldom and generally focused on UV-B. However UV-C radiation play an important role in accumule secondary metabolites. RESULTS: In this study, callus cultures from Öküzgözü grape cultivar were initiated from leaf petiole explants. Calli formed after 6 weeks on the medium supplemented with 0.5 mg L-1 benzylaminopurine (BA), 0.5 mg L-1 indole acetic acid (IAA) on B5... |
| Tipo: Journal article |
Palavras-chave: Callus; Secondary metabolite; UV-C treatment. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100037 |
| |
|
|
| Onofre,Sideney Becker; Riveros Gonzalez,Raul; Messias,Cláudio Luiz; Azevedo,João Lúcio; Barros,Neiva Monteiro de. |
| The entomopathogenic fungus Nomuraea rileyi (Farlow) Samson produced a peptide active against Anticarsia gemmatalis 3rd instar larvae. To produce this peptide, N. rileyi was cultivated aerobically in Saboraud, maltose, yeast-extract broth at 26 ± 1ºC for 12 days, after which the medium was filtered and separated in a liquid/liquid extractor, concentrated and the peptide purified chromatographically. The crystals obtained were kept refrigerated until needed for LC50 analysis. The LC50 of this peptide against A. gemmatalis 3rd instar larvae was determined in triplicate experiments using solutions containing 1.0, 0.2, 0.1, 0.01, 0.001 and 0.0001 mg/ml of N. rileyi peptide. The results of these experiments were used to calculate a linear equation in which Y =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anticarsia gemmatalis; Nomuraea rileyi; Integrated control; Secondary metabolite; Toxins. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300004 |
| |
|
|
| Shohael,Abdullah Mohammad; Murthy,Hosakatte Niranjana; Hahn,Eun-Joo; Paek,Kee-Yoeup. |
| This study was concentrated on the production of eleutherosides and chlorogenic acid in embryogenic suspension cultures of Eleutherococcus senticosus by exposing them to different concentrations (50-400 µM) of methyl jasmonate (MJ) during the culture period. In the bioreactor cultures, eleutheroside content increased significantly by elicitation of MJ, however, the fresh weight, dry weight and growth ratio of embryos was strongly inhibited by increasing MJ concentrations. The highest total eleutheroside (7.3 fold increment) and chlorogenic acid (3.9 fold increment) yield was obtained with 200 µM MJ treatment. There was 1.4, 3.4 and 14.9 fold increase in the eleutheroside B, E, and E1 production respectively with such elicitation treatment. These results... |
| Tipo: Journal article |
Palavras-chave: Eleutherosides; Elicitation; Methyl jasmonate; Secondary metabolite; Siberian ginseng; Suspension culture. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000400016 |
| |
|
|
| Chaichanan,Jirapan; Wiyakrutta,Suthep; Pongtharangkul,Thunyarat; Isarangkul,Duangnate; Meevootisom,Vithaya. |
| To optimize the medium for high zofimarin production, sucrose maltose, glucose, tryptone and peptone were used in an orthogonal array design experiment, where the highest value of zofimarin produced was 25.6 µg/mL. This value was about 3 times higher than that obtained with Czapek yeast extract (CzYE) culture medium. A study with Plackett-Burman design showed that sucrose, maltose, glucose and NaNO3 were significant factors in zofimarin production. Further studies using central composite design (CCD) showed the significance of glucose and the interactions of these critical components affecting zofimarin production. Multiple regression analysis of the data yielded a poor fit as shown by the mismatch of the model with these variable factors. When a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zofimarin; Secondary metabolite; Medium optimization; Statistical methods; Endophytic fungus. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100042 |
| |
|
|
| Gharehmatrossian,Sormeh; Popov,Yu; Ghorbanli,Mahlagha; Safaeian,Shila; Iranbakhsh,Alireza. |
| ABSTRACT Shoot regeneration, callus growth, and biosynthesis of shikonin in callus cultures of Onosma sericeum were examined. Plant tissue culture was used as an alternative method for increasing the production of shikonin, a secondary metabolite. The isolated cultures were subjected to abiotic factors such as light, plant growth regulators, and nutritional factors. Identification was carried out by High- Performance Liquid Chromatography (HPLC) after 10th subculture. Nodal explants were incubated in Murashige and Skoog (MS) medium along with different combination of growth hormones. Shoot regeneration from calli were achieved on MS basal medium supplemented with 3 mg/l 6-benzylaminopurine (BAP) and 0.5 mg/l Naphthalene acetic acid (NAA) under light cycle.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth index; Medicinal plant; Plant regeneration; Secondary metabolite. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100428 |
| |
|
|
| Cetin,Emine Sema; Babalik,Zehra; Hallac-Turk,Filiz; Gokturk-Baydar,Nilgun. |
| BACKGROUND: Plant secondary metabolites are possess several biological activities such as anti-mutagenic, anti-carcinogenic, anti-aging, etc. Cell suspension culture is one of the most effective systems to produce secondary metabolites. It is possible to increase the phenolic compounds and tocopherols by using cell suspensions. Studies on tocopherols production by cell suspension cultures are seldom and generally focused on seed oil plants. Although fresh grape, grape seed, pomace and grape seed oil had tocopherols, with our best knowledge, there is no research on tocopherol accumulation in the grape cell suspension cultures. In this study, it was aimed to determine the effects of cadmium chloride treatments on secondary metabolite production in cell... |
| Tipo: Journal article |
Palavras-chave: Cadmium chloride; Cell; Secondary metabolite. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100047 |
| |
|
|
| Sivira,A; Sanabria,ME; Valera,N; Vásquez,C. |
| Botanical compounds with insecticidal and acaricidal activities have been used in pest management with different levels of success. Toxicity of ethanolic extracts obtained from wild oregano (Lippia origanoides) and gliricidia (Gliricidia sepium) to Tetranychus cinnabarinus (Boisduval) were evaluated. Mite population was collected from black bean plants growing in Urachiche Municipality, Yaracuy State, Venezuela. Ethanolic extracts of wild oregano and gliricidia leaves were evaluated at different concentrations (5, 10, 15, and 20%) using the leaf disk immersion technique. The presence of alkaloids, flavonoids, phenols and tannins, essential oils and saponins was verified in the plant material used in our study. Tetranychus cinnabarinus oviposition decreased... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Botanical acaricide; Carmine spider mite; Secondary metabolite. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000300011 |
| |
| Registros recuperados: 13 | |
|
|
|
