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Search Results: 1 - 10 of 1797 matches for " Marinho Jeanne Scardini "
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Inibidores de proteases de hospedeiros nativos e exóticos e sua a??o em intestinos de lagartas de Thyrinteina leucoceraea
Marinho, Jeanne Scardini;Oliveira, Maria Goreti Almeida;Guedes, Raul Narciso Carvalho;Pallini, Angelo;Oliveira, Claudinei Lima;
Revista árvore , 2008, DOI: 10.1590/S0100-67622008000600018
Abstract: insects may cause considerable losses to plants, but some insects inhabit plants without causing any damages. for example, thyrinteina leucoceraea, found in the guava plants, and a native myrtaceae family host, does not cause any serious damage. however, eucalyptus ssp., novel hosts (also myrtaceae) in brazil and introduced from australia, suffer attacks by t. leucoceraea, which became a severe pest of this plant. plants can defend themselves against herbivores using proteinase inhibitors which reduce insect development and lead them to death. thus, based on studies on the development of t. leucoceraea caterpillars on these two hosts and plant defense, this work aimed to verify the production of proteinase inhibitors by guava and eucalyptus plants upon t. leucoceraea attack, and to observe the biochemical response of the midgut of the caterpillars to these inhibitors. eucalyptus plants produced more proteinase inhibitors than guava plants. the good development of t. leucoceraea in eucalyptus plants despite the high concentration of proteinase inhibitors may be due to an increase of enzyme activity in the caterpillars' midgut. our data suggest that t. leucoceraea developed an adaptation to the proteinase inhhibitor produced by eucalyptus plants, by increasing serine-proteinase and cys-proteinase activities.
Adapta o de Thyrinteina arnobia em novo hospedeiro e defesa induzida por herbívoros em eucalipto
Holtz Anderson Mathias,Oliveira Hamilton Gomes de,Pallini Angelo,Marinho Jeanne Scardini
Pesquisa Agropecuária Brasileira , 2003,
Abstract: O sistema de defesa induzido de plantas é ativado quando herbívoros se alimentam das mesmas. Alternativamente, herbívoros podem se adaptar a espécies de plantas filogeneticamente próximas ao seu hospedeiro de origem. O objetivo deste trabalho foi comparar o desenvolvimento de Thyrinteina arnobia em plantas de goiaba (hospedeiro de origem) e de eucalipto (hospedeiro novo) em campo. Adicionalmente, estudou-se a biologia deste inseto em laboratório fornecendo folhas de eucalipto previamente danificadas por lagartas de T. arnobia e folhas sem danos. A sobrevivência larval em eucalipto, 78,00%, foi superior à de goiaba, 29,33%. O ciclo larval foi de 27,90 dias em goiaba e de 30,30 dias em eucalipto. Em testes de laboratório, o ciclo larval em eucalipto limpo, 36,39 dias, foi maior do que em eucalipto danificado, 32,89 dias. A mortalidade larval em eucalipto danificado foi de 30,00% e de 10,00% em eucalipto limpo. Os resultados indicam que a goiaba n o é um bom hospedeiro para T. arnobia possivelmente por apresentar um sistema mais efetivo de defesa. Embora o eucalipto possa ser um hospedeiro mais favorável ao desenvolvimento e estabelecimento do inseto, pode também reduzir popula es do herbívoro ativando o seu sistema de defesa induzido.
CARACTERíSTICAS BIOLóGICAS DE ADULTOS DE PODISUS NIGRISPINUS E SUPUTIUS CINCTICEPS (HEMIPTERA: PENTATOMIDAE) ALIMENTADOS COM THYRINTEINA ARNOBIA (LEPIDOPTERA: GEOMETRIDAE) BIOLOGICAL CHARACTERISTICS OF ADULTS OF PODISUS NIGRISPINUS AND SUPPUTIUS CINCTICEPS (HEMIPTERA: PENTATOMIDAE) FED ON THYRINTEINA ARNOBIA (LEPIDOPTERA: GEOMETRIDAE)
Anderson Mathias Holtz,José Cola Zanuncio,Jeanne Scardini Marinho,Dirceu Pratissoli
IDESIA , 2006,
Abstract: O gênero Eucalyptus (mirtacea exótica proveniente da Austrália) é o mais utilizado para reflorestamento no Brasil. Porém, somente a partir de 1966 é que este setor tomou impulso no país. Assim, além de exótica, a eucaliptocultura é recente. Periodicamente s o observados surtos de lepidópteros desfolhadores (Thyrinteina arnobia, por exemplo). No Brasil, os predadores Podisus nigrispinus e Supputius cincticeps vem sendo utilizados contra lepidópteros desfolhadores, porém n o se têm dados sobre o estabelecimento desses predadores em campo. Sendo assim, o objetivo deste trabalho foi verificar os aspectos biológicos de adultos de P. nigrispinus e S. cincticeps sobre lagartas de T. arnobia provenientes de plantas de Eucalyptus urophylla. Comparando-se os aspectos biológicos das duas espécies de predadores, observa-se que o desempenho de P. nigrispinus sobre as lagartas de T. arnobia foi melhor do que o desempenho de S. cincticeps. Este resultado demonstra que P. nigrispinus está conseguindo quebrar possíveis sistemas de defesa dessa espécie de herbívoro, tais como os compostos secundários que o herbívoro provavelmente estaria seqüestrando das plantas de eucalipto e, se os inimigos naturais (S. cincticeps, por exemplo) n o estiverem adaptados a esses compostos, a sua performance no controle da praga e no seu próprio desenvolvimento podem ser afetados negativamente. The Eucalyptus genus (an exotic mirtacea proceeding from Australia) is used for reforestation in Brazil. However, only after 1966 did this sector take impulse in the country. Thus, beyond exotic, the cultivation of this genus is recent. Defoliation caused by epidemics of lepidopterous species, such as Thyrinteina arnobia, for example, had been observed periodically. In Brazil Podisus nigrispinus and Supputius cincticeps are being used as predators against defoliator lepidopterous species, however in current literature information is not available about the establishment of these predators in the field. The objective of this work was to analyze the biological aspects of P. nigrispinus and S. cincticeps adults on T. arnobia caterpillars collected on Eucalyptus urophylla plants. Comparing the biological aspects of the two predators species, the performance of P. nigrispinus on the caterpillars of T. arnobia was observed as better than the performance of S. cincticeps. Based on these results it is possible to demonstrate that P. nigrispinus is breaking possible systems of defense of this specie of herbivore, such as the secondary metabolites that the herbivore probably would be kidnapping from eucalyptu
RESPOSTA BIOQUíMICA DE THYRINTEINA LEUCOCERAEA A INIBIDOR DE PROTEASES EM PLANTAS DE GOIABA BIOCHEMICAL RESPONSE OF THYRINTEINA LEUCOCERAEA TO PROTEASES INHIBITOR IN GUAVA PLANTS
Jeanne Scardini Marinho,Maria Goreti de Almeida Oliveira,Raul Narciso de Carvalho Guedes,Angelo Pallini
IDESIA , 2010,
Abstract: As plantas têm um tipo de defesa que interfere no sistema digestivo dos insetos através da express o de diferentes inibidores de proteases (IPs). Os IPs agem inibindo enzimas proteolíticas no intestino dos insetos, podendo até levá-los à morte. Por isso, estudos têm sido realizados visando à utiliza o desses compostos como método alternativo no controle de insetos fitófagos. As lagartas de Thyrinteina leucoceraea causam muitos danos em eucaliptais, mas n o conseguem se desenvolver bem em folhas de goiabeira, portanto é interessante que a defesa desta planta seja investigada. Sendo assim, este trabalho estudou a resposta enzimática da lagarta T. leucoceraea ao aumento da concentra o do IP benzamidina (IP sintético de serino-proteases) aplicado sobre as folhas de goiabeira, a fim de estudar a a o do inibidor sintético em conjunto com o inibidor natural produzido por essas plantas. Para tal investiga o, foram utilizadas três diferentes concentra es de benzamidina: 0, 12, 0,25 e 0,5%. Verificou-se que as goiabeiras produzem IPs como resposta de defesa e que a benzamidina aplicada nas plantas de goiaba interferiu na atividade das serino-proteases no intestino de lagartas de T. leucoceraea, entretanto, pode-se observar também que as lagartas apresentaram adapta o à ingest o dos IPs através do aumento da atividade de cisteíno-proteases em quase todos os tratamentos. Plants have a type of defense that interferes with the digestive system of insects through the expression of different protease inhibitors (PIs). PIs act by inhibiting proteolytic enzymes in the gut of insects, and may even lead them to death. Therefore, studies have been conducted in order to use these compounds as an alternative method in control of phytophagous insects. The Thyrinteina leucoceraea is prague on eucalypts, but does not cause severe damage in leaves of guava, so it is interesting that the defense of this plant is investigated. Thus, this work studied the enzymatic response of the caterpillar T. leucoceraea further concentration of benzamidine PI (PI synthetic of serine proteases) applied to the leaves of guava in order to evaluate the effects of synthetic inhibitor in conjunction with the natural inhibitor produced by these plants. For this investigation, we used three different concentrations of benzamidine, 0.12, 0.25 and 0.5%. It was found that the guava produce IPs in response to defense and that the benzamidine applied on leaves of guava interfere in the activity of serine proteases in the gut of larvae of T. leucoceraea. However, it can also be observed that the caterpi
RESPOSTA BIOQUíMICA DE THYRINTEINA LEUCOCERAEA A INIBIDOR DE PROTEASES EM PLANTAS DE GOIABA
Scardini Marinho,Jeanne; Goreti de Almeida Oliveira,Maria; de Carvalho Guedes,Raul Narciso; Pallini,Angelo; de Oliveira,Joel Ant?nio;
Idesia (Arica) , 2010, DOI: 10.4067/S0718-34292010000300013
Abstract: plants have a type of defense that interferes with the digestive system of insects through the expression of different protease inhibitors (pis). pis act by inhibiting proteolytic enzymes in the gut of insects, and may even lead them to death. therefore, studies have been conducted in order to use these compounds as an alternative method in control of phytophagous insects. the thyrinteina leucoceraea is prague on eucalypts, but does not cause severe damage in leaves of guava, so it is interesting that the defense of this plant is investigated. thus, this work studied the enzymatic response of the caterpillar t. leucoceraea further concentration of benzamidine pi (pi synthetic of serine proteases) applied to the leaves of guava in order to evaluate the effects of synthetic inhibitor in conjunction with the natural inhibitor produced by these plants. for this investigation, we used three different concentrations of benzamidine, 0.12, 0.25 and 0.5%. it was found that the guava produce ips in response to defense and that the benzamidine applied on leaves of guava interfere in the activity of serine proteases in the gut of larvae of t. leucoceraea. however, it can also be observed that the caterpillars were adapted to the ingestion of pis by increasing the activity of cysteine proteases in almost all treatments.
CARACTERíSTICAS BIOLóGICAS DE ADULTOS DE PODISUS NIGRISPINUS E SUPUTIUS CINCTICEPS (HEMIPTERA: PENTATOMIDAE) ALIMENTADOS COM THYRINTEINA ARNOBIA (LEPIDOPTERA: GEOMETRIDAE)
Mathias Holtz,Anderson; Cola Zanuncio,José; Scardini Marinho,Jeanne; Pratissoli,Dirceu; Pallini,?ngelo; de Jesus Pereira,Célia;
Idesia (Arica) , 2006, DOI: 10.4067/S0718-34292006000200006
Abstract: the eucalyptus genus (an exotic mirtacea proceeding from australia) is used for reforestation in brazil. however, only after 1966 did this sector take impulse in the country. thus, beyond exotic, the cultivation of this genus is recent. defoliation caused by epidemics of lepidopterous species, such as thyrinteina arnobia, for example, had been observed periodically. in brazil podisus nigrispinus and supputius cincticeps are being used as predators against defoliator lepidopterous species, however in current literature information is not available about the establishment of these predators in the field. the objective of this work was to analyze the biological aspects of p. nigrispinus and s. cincticeps adults on t. arnobia caterpillars collected on eucalyptus urophylla plants. comparing the biological aspects of the two predators species, the performance of p. nigrispinus on the caterpillars of t. arnobia was observed as better than the performance of s. cincticeps. based on these results it is possible to demonstrate that p. nigrispinus is breaking possible systems of defense of this specie of herbivore, such as the secondary metabolites that the herbivore probably would be kidnapping from eucalyptus plants. if the natural enemies (s. cincticeps, for example) will not be adapt to these composites, its performance in the control of the pest and on its development can be negatively affected.
Adapta??o de Thyrinteina arnobia em novo hospedeiro e defesa induzida por herbívoros em eucalipto
Holtz, Anderson Mathias;Oliveira, Hamilton Gomes de;Pallini, Angelo;Marinho, Jeanne Scardini;Zanuncio, José Cola;Oliveira, Claudinei Lima;
Pesquisa Agropecuária Brasileira , 2003, DOI: 10.1590/S0100-204X2003000400002
Abstract: the induced defense system of plants is activated when herbivorous start to injury plants. alternatively, herbivores may adapt to plants that are phylogenetically close to their original host. this work aimed at comparing the life history of thyrinteina arnobia on guava plants (origin host) with eucalyptus (the new host) in the field. the biology of the insect in the laboratory on both eucalyptus leaves previously injured by the caterpillars of t. arnobia and on clean leaves was also studied. in the field, the larvae survivorship of t. arnobia on eucalyptus was 78.00% and on guava was 29.33%. the larvae cycle was 27.90 days on guava and 30.30 days on eucalyptus. at the laboratory, tests showed that the larvae cycle on clean eucalyptus leaves lasted 36.39 days while on previously injured leaves, only 32.89 days. the larvae mortality on injured eucalyptus leaves was 30.00%, and 10.00% on clean leaves. the results indicate that guava plants are not a suitable host for t. arnobia probably due to a more effective defense system. although the eucalyptus may be a better host, it can also reduce the herbivore population by activating its herbivore induced defense system.
Aspectos biológicos de Thyrinteina arnobia (Lep.: Geometriadae) provenientes de lagartas criadas em folhas de Eucalyptus cloeziana ou de Psidium guajava sob condi??es de campo
Holtz, Anderson Mathias;Zanuncio, José Cola;Oliveira, Hamilton Gomes de;Pallini, Angelo;Marinho, Jeanne Scardini;Oliveira, Claudinei Lima;Pinon, Tobias Baruc Moreira;
Revista árvore , 2003, DOI: 10.1590/S0100-67622003000600016
Abstract: eucalyptus plantations in brazil may be damaged by native insects of many orders including orthoptera, coleoptera and lepidoptera. these insects feed on brazilian tree species of the family myrtaceae to which the genus eucalyptus belongs. the lepidoptera thyrinteina arnobia stoll (lepidoptera: geometridae) is the most harmful defoliator of eucalyptus in brazil. the objective of this work was to evaluate biological aspects of t. arnobia adults originated from caterpillars fed on guava or eucalyptus plants. adults of t. arnobia originated from caterpillars reared with eucalyptus or guava leaves presented significant differences for most biological aspects evaluated, except for duration of preoviposition and oviposition periods and sex ratio. this shows that species feeding on host plants related to eucalyptus can cause considerable damage in reforestation with species of this genus. t. arnobia insects are still undergoing an imposed adaptation process to eucalyptus plants and likely feed on these plants to escape from pressure by physical and chemical barriers of brazilian native myrtaceae.
Breastfeeding and obesity: a meta-analysis  [PDF]
Jeanne M. Stolzer
Open Journal of Preventive Medicine (OJPM) , 2011, DOI: 10.4236/ojpm.2011.13013
Abstract: Over the last decade, obesity rates have reached epidemic proportions in the United States of America. Comorbidities associated with overweight and obesity include, but are not limited to, hypertension, type 2 diabetes, cardiovascular disease, and elevated cholesterol levels. As a direct result of obesity, data indicates that these diseases are now being detected in an unprecedented number of American children, adolescents, and adults. Although the major cause of the obesity epidemic in America has thus far been attributed to excessive caloric intake and lack of physical activity, this paper will explore the pivotal role that breastfeeding plays in the prevention of overweight and obesity throughout the life course. Epidemiological data demonstrates that breastfeeding significantly reduces the incidence of overweight and obesity and that exclusive and long term breastfeeding has been strongly correlated with a reduction in LDL cholesterol, blood pressure related disorders, type 2 diabetes, and cardiovascular dysfunction. While it is certain that diet and exer cise are integral factors associated with overweight and obesity, the time has come for a collective recognition of the protective effects associated with breastfeeding if we are serious in our endeavor to eradicate the overweight and obesity epidemic in America.
The Conversational Outcomes of Task Implementation  [PDF]
Jeanne Rolin-Ianziti
Open Journal of Modern Linguistics (OJML) , 2014, DOI: 10.4236/ojml.2014.41010
Abstract:

Arguing that tasks are primarily a resource to deploy interactions in the classroom, the present study uses a conversation analysis framework to investigate forms of talk resulting from the implementation of the task-based language teaching approach (TBLT) in the second language (L2) classroom. On the basis of three extracts selected from naturally occurring conversations between second semester beginners in French and their teacher as they are completing a comprehension task and a production task in situ, the study uncovers five types of interactions, respectively labeled the teaching interaction, the L1 to L2 how do you say exchange, the correctness interaction, the correction interaction and the repair exchange. Variations across types are apparent in the turn-taking system and in the sequential organization of the interactions. The variations are explained by referring to the characteristics of the two tasks as work plans, as well as to the contextual factors (i.e. the underlying activity and the classroom organization) that are put into place during the implementation of the tasks. Finally, the teaching implications of the study’s findings are discussed, arguing that this kind of research may be useful for teacher training purposes insofar as it provides classroom input to reflect upon the processes at play during TBLT implementation.

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