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Inductor resistence plant

Eugenio Llorens, Carlos Agustí-Brisach, Ana I González-Hernández, Pilar Troncho, Begonya Vicedo, Teresa Yuste, Mayte Orero, Carlos Ledó, Pilar García-Agustín, Leonor Lapeña
BACKGROUND: Developments of alternatives to the use of chemical pesticides to control pests are focused on the induction of natural plant defences. The study of new compounds based on liquid bioassimilable sulphur and its effect as an inductor of the immune system of plants would provide an alternative option to farmers to enhance plant resistance against pathogen attacks such as powdery mildew. In order to elucidate the efficacy of this compound in tomato against powdery mildew, we tested several treatments: curative foliar, preventive foliar, preventive in soil drench and combining preventive in soil drench and curative foliar...
August 25, 2016: Pest Management Science
José Ribamar Costa Ferreira Neto, Manassés Daniel da Silva, Valesca Pandolfi, Sérgio Crovella, Ana Maria Benko-Iseppon, Ederson Akio Kido
For sessile organisms such as plants, regulatory mechanisms of gene expression are vital, since they remain exposed to climatic and biological threats. Thus, they have to face hazards with instantaneous reorganization of their internal environment. For this purpose, besides the use of transcription factors, the participation of chromatin as an active factor in the regulation of transcription is crucial. Chemical changes in chromatin structure affect the accessibility of the transcriptional machinery and acting in signaling, engaging/inhibiting factors that participate in the transcription processes...
July 24, 2016: Current Protein & Peptide Science
Estefanía Carrillo-Perdomo, David Jiménez-Arias, Ángel Aller, Andrés A Borges
BACKGROUND: Snails and slugs are terrestrial gastropods representing an important biotic stress that adversely affects crop yields. These pests are typically controlled with molluscicides, which produce pollution and toxicity and further induce the evolution of resistance mechanisms, making pest management even more challenging. In our work, we have assessed the efficacy of two different plant defence activators, menadione sodium bisulphite (MSB) and 1,2,3-benzothiadiazole-7-thiocarboxylic acid S-methyl ester (BTH), as inducers of resistance mechanisms of the model plant for defence, Solanum lycopersicum, against the generalist mollusc Theba grasseti (Helicidae)...
May 2016: Pest Management Science
Oyarburo Natalia Soledad, Machinandiarena Milagros Florencia, Feldman Mariana Laura, Daleo Gustavo Raúl, Andreu Adriana Balbina, Olivieri Florencia Pía
The use of biocompatible chemical compounds that enhance plant disease resistance through Induced Resistance (IR) is an innovative strategy to improve the yield and quality of crops. Phosphites (Phi), inorganic salts of phosphorous acid, are environment friendly, and have been described to induce disease control. Phi, similar to other plant inductors, are thought to be effective against different types of biotic and abiotic stress, and it is assumed that the underlying signaling pathways probably overlap and interact...
March 2015: Plant Physiology and Biochemistry: PPB
Maria Beatriz Calderan Rodrigues, Léia Cecília de Lima Fávaro, Ana Paula de Souza Pallu, Anderson Ferreira, Fernanda de Souza Sebastianes, Maria Juliana Calderan Rodrigues, Marcel Bellato Spósito, Welington Luiz de Araújo, Aline Aparecida Pizzirani-Kleiner
Guignardia citricarpa is the causal agent of Citrus Black Spot (CBS), an important disease in Citriculture. Due to the expressive value of this activity worldwide, especially in Brazil, understanding more about the functioning of this fungus is of utmost relevance, making possible the elucidation of its infection mechanisms, and providing tools to control CBS. This work describes for the first time an efficient and successful methodology for genetic transformation of G. citricarpa mycelia, which generated transformants expressing the gene encoding for the gfp (green fluorescent protein) and also their interaction with citrus plant...
July 2013: Fungal Biology
Fabrícia Petronilho, Felipe Dal-Pizzol, Geison Modesti Costa, Virgínia Demarchi Kappel, Simone Quintana de Oliveira, Jucélia Fortunato, Vanilde Cittadini-Zanette, José Cláudio Fonseca Moreira, Cláudia Maria Oliveira Simões, Felipe Dal-Pizzol, Flávio Henrique Reginatto
CONTEXT: Cecropia glaziovii Snethl. (Cecropiaceae), commonly known as "embaúba-vermelha", is widely distributed throughout Latin America and has been reported in Brazilian folk medicine to treat cough, asthma, high blood pressure and inflammation. OBJECTIVE: Investigate the hepatoprotective properties of crude hydroethanolic extract of C. glaziovii as well as its in vitro antioxidant and antiviral (HSV-1 acyclovir resistant strain) activities. MATERIALS AND METHODS: The hepatoprotective effect, the antioxidant properties and antiviral activity of crude hydroethanol extract (RCE40) from C...
July 2012: Pharmaceutical Biology
Sofia Costa-de-Oliveira, Belém Sampaio-Marques, Matilde Barbosa, Elisabete Ricardo, Cidália Pina-Vaz, Paula Ludovico, Acácio G Rodrigues
Our aim was to detect the presence of an alternative oxidase (AOX) in Candida krusei clinical strains and its influence on fluconazole susceptibility and in reactive oxygen species (ROS) production. Candida krusei clinical isolates were tested to evaluate the presence of AOX. Debaromyces hansenii 2968 (AOX positive) and Saccharomyces cerevisiae BY4742 (AOX negative) were used as control strains. Measurements of oxygen consumption were performed in the presence of 1 mM KCN, an inhibitor of the classical respiratory chain, and 5 mM salicylhydroxamic acid (SHAM)...
June 2012: FEMS Yeast Research
G Nosáľová, L Prisenžňáková, E Paulovičová, P Capek, M Matulová, L Navarini, F Suggi Liverani
A low molecular mass arabinogalactan-protein (AGP) composed of galactose and arabinose with a low protein content, isolated from the instant coffee powder of Coffea arabica beans, has been tested on antitussive (in vivo) and immunomodulating (ex vivo) activities. The results of antitussive tests revealed a significant dose dependant cough-suppressive effect of coffee AGP. It was observed 30 or 60 min after AGP administration and its efficacy lasted during the entire experiment course. Immunological tests showed that AGP affected some mediators of immunocompetent cells of immune system as TNF-α, IFN-γ and IL-2 cytokines...
November 1, 2011: International Journal of Biological Macromolecules
S A Poliakovskiĭ, Zh N Kravchuk, A P Dmitriev
The effects of beta-aminobutiric acid as an inductor of plant resistance was studied. The influence of BABA pretreatment on A. cepa plants of three different pathogen-resistant varieties was investigated by fluorescence microscopic methods. It was determined that BABA is able to prime the plant callose accumulation.
November 2008: T︠S︡itologii︠a︡ i Genetika
Flávia B Gomes, Jair C Moraes, Custódio D dos Santos, Cristiana S Antunes
The aphid Myzus persicae (Sulzer) is an important pest of potato and causes direct harm, due to the quantity of sap extracted and for being vector of important phytovirus. This work was carried out to evaluate the action of silicon as a resistance inducer of potato to M. persicae. Four treatments were tried: foliar fertilization with silicon acid at 1%; soil fertilization with 250 ml silicic acid solution at 1%; foliar fertilization with silicon acid at 1% + soil fertilization with 250 ml silicic acid solution at 1%; and a control...
March 2008: Neotropical Entomology
N B Troshina, L G Iarullina, O B Surina, I V Maksimov
A study was made of the influence of bisol 2 and baitan compounds on morphogenesis and defence response of wheat calluse cells infected with bunt agent in associated with oxalate oxidase activation. After introduction of bisol and baitan into cultivation medium, dense area with meristema zones, germs of shoots and rhizoids appeared on non-morphogenic calluses, which correlated with enzyme activation. Parenchyma-like cells, generating hydrogen peroxide, were seen in the site of pathogen penetration under infestation, but were never revealed in control...
2006: Tsitologiia
T A Ezhova, O P Soldatova, L B Mamanova, S M Musin, B Grimm, S V Shestakov
Selective systems for screening Arabidopsis thaliana (L.) Heynh. mutants with altered sensitivity to the oxidative stress (OS) inductors norflurazon (NF), acifluorfen (AF), and plumbagin (PB) were developed and a collection of 28 mutants was obtained. Dwarf and necrotic forms predominated among the NF-tolerant mutants, while pigment mutants and those with changed root morphology prevailed among the AF-tolerant and PB-sensitive mutants, respectively. Genetic and biochemical analysis of certain mutants was performed; quantitative and qualitative changes in the content of superoxide dismutase and peroxidase isoforms have been revealed...
September 2001: Izvestiia Akademii Nauk. Seriia Biologicheskaia
Fu-Yun Zhang, Bin Feng, Yu-Guang Du, Xue-Fang Bai, Yu-Kui Zhang
Oligochitosan is an effective inductor for plant resistance. To understand the induced resistance mechanism, mRNA differential display was used to isolate genes from Nicotiana tabacum var. Samsun NN and four enhanced-expression gene fragments were obtained and were reamplified. The reamplified products of appropriate size were isolated and purified before they were subcloned into PMD18-T vector. The results of plasmids digestion by EcoRI and HindIII and analysis of reverse Northern blot indicated that the expression of the four genes was enhanced by oligochitosan induction...
April 2005: Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao, Journal of Plant Physiology and Molecular Biology
N B Troshina, I V Maksimov, L G Iarullina, O B Surina, E A Cherepanova
We have studied the influence of various concentrations of chitooligosaccharides (CO) on hydrogen peroxide (H2O2) generation, with the involvement of oxalate oxidase (OO), in rhizoids and in zones of hard brand pathogen penetration, as well as on oxalate oxidase activity in wheat calluses. In the control group, diaminobenzidin (DAB)-staining was typical of 30% of peripheral rhizoid cells, which provided their resistance during infection. In the zone of fungus penetration, the appearance of DAB-stained parenchyma-like cells was observed...
2004: Tsitologiia
N B Troshina, I V Maksimov, L G Iarullina, O B Surina, E A Cherepanova
The influence of salicylic acid (SA) on cell resistance to bunt pathogen in wheat calluses has been studied. Cell staining by diaminobenzidin substratum (DAB-cells) was conditioned by hydrogen peroxide (H2O2) generation with the involvement of oxalate oxidase (OO). In the control group, DAB-staining was typical only of rhizoid cells (up to 50%). The infection caused no significant increase in the number of such cells; however, in the zone of fungus penetration parenchyma-like DAB-stained cells were observed (up to 24%)...
2004: Tsitologiia
M I Azimov, M E Krakovskiĭ, A Kh Ashirmerov
The efficacy of inductors and adaptogens (benzonal and saparal) in combined therapy of patients with acute maxillofacial inflammations was investigated. These agents were conducive to shortening of the treatment periods and prevented complications (chronic osteomyelitis). A sooner recovery of the disordered homeostatic constants of the body (microsomal monoxygenase activities, acetylation processes, nonspecific resistance, leukocytic index of intoxication) was achieved.
September 1991: Stomatologii︠a︡
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