Seasonal Dormancy
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Reorganização estrutural e metabólica do tecido cardíaco associada à dormência e jejum sazonal em lagartos teiú Tupinambis merianae / Structural and metabolic reorganization of heart tissue associated with seasonal dormancy and fasting in tegu lizards Tupinambis merianae
O coração é um órgão notável por sua flexibilidade estrutural e metabólica em resposta a variações de demanda. Na dormência sazonal, a interrupção da alimentação, associada à inatividade física e à acentuada redução da frequência cardíaca, ocasiona uma inibição da demanda sobre a função do órgão e, provavelmente, uma reorganizaçã
Publicado em: 2011
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2. Structural and metabolic reorganization of the gut during the fasting and seasonal dormancy in tegu lizards Tupinambis merianae / Reorganização estrutural e metabólica do intestino associada ao jejum e dormência sazonal em lagartos teiú Tupinambis merianae
The gut phenotypic plasticity is widely documented in the vertebrates and would allow to either short term or anticipatory adjustments in the organ functional capacity, to cope with unpredictable and periodic changes of food availability in the environment. This study investigates seasonal changes of morphology and in the capacity for substrate oxidation in
Publicado em: 2009
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3. Análise faunística e flutuação populacional de cigarrinhas (Hemiptera: Cicadellidae) potenciais vetoras de Xylella fastidiosa em pomares de ameixeira nos estados do Rio Grande do Sul e São Paulo, Brasil / Faunistic analysis and seasonal fluctuation of sharpshooters (Hemiptera:Cicadellidae) that are potential vectors of Xylella fastidiosa in plum orchards in Rio Grande do Sul and São Paulo states, Brazil
The plum leaf scald (PLF) is a major threat for plum production in Brazil. PLF is caused by the bacteria Xylella fastidiosa which is transmitted by sharpshooter leafhoppers (Hemiptera: Cicadellidae, Cicadellinae). In this investigation, we surveyed the Cicadellinae species associated with plum orchards located in Rio Grande do Sul (RS) and São Paulo (SP) st
Publicado em: 2009
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4. O papel dos lipídios na reorganização metabólica associada à dormência sazonal no lagarto teiú Tupinambis merianae (Sauria, Teidae) / The role of lipids in the metabolic reorganization associated to seasonal dormancy in tegu lizards, Tupinambis merianae (Sauria, Teiidae)
O jejum prolongado associado `a dormência sazonal é um fenômeno característico de diversos grupos de vertebrados, e os lipídios tem se mostrado bastante importantes na manutenção destes animais. No presente estudo pretendeu-se caracterizar a reorganização metabólica no jejum de 3-4 meses associado à dormência e depressão metabólica acentuada em
Publicado em: 2007
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5. Biologia reprodutiva e germinação de sementes em Adenostemma brasilianum (Pers.) Cass. (Asteraceae) / Reproductive biology and seed germination of Adenostemma brasilianum. (Pers.) Cass. (Asteraceae)
Specific studies on the reproductive biology and seed germination of Adenostemma brasilianum are inexistent. Aiming to fill this gap, the objective of this study was to investigate its life history (reproductive phenology and fruit dispersion process), reproductive biology, including tests on the efficiency of two types of materials in isolating the heads fr
Publicado em: 2007
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6. Fructan metabolizing enzymes in Vernonia herbacea (VELL.) Rusby. / Enzimas do metabolismo de frutanos em Vernonia herbacea (VELL.) Rusby.
The occurrence of fructans has been reported in native species of a cerrado area of Reserva Biológica e Estação Experimental de Moji Guaçu. Vernonia herbacea, one of these species, presents underground organs named rhizophores which accumulate fructans of the inulin type as reserve carbohydrate. The seasonal growth pattern exhibited by plants of V. herba
Publicado em: 2003
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7. Dinamica da dispersão de sementes e regeneração de plantas da planicie litoranea da Ilha do Mel, PR
(Seed dispersal and plant regeneration dynamics in a Sandy Coastal Plain on Ilha do Mel, southern Brazil): The island Ilha do Mel is located in the municipality of Paranaguá (25°29 /25°34 32"S e 48°17 15"/48°23 16"W) in the central coastal region of Paraná State, Brazil and comprises 2760ha. The higher areas above the Sandy Coastal Plain contains very
Publicado em: 2002
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8. Seasonal Changes in the Structure and Function of Mitochondrial Membranes of Artichoke Tubers: A Requisite for Surviving Low Temperatures during Dormancy
The temperature limits of the order-disorder transition, and the Arrhenius activation energy of succinate oxidase activity for mitochondria of Jerusalem artichoke (Helianthus tuberosus L.) tubers were determined from the initiation to the termination of dormancy. The temperature limits for the transition at the initiation of dormancy were 25 and 3 C. These c
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9. Seasonal Changes in the Structure and Function of Mitochondrial Membranes of Artichoke Tubers: Acyl Fatty Acid Composition and the Effect of Growth Conditions
Changes in the temperature response, fluidity, function and the acyl fatty acid composition, were determined for a mitochondria-rich membrane fraction from Jerusalem artichoke (Helianthus tuberosus L.) tubers during dormancy for a crop which matured in midsummer. The temperature of both the upper and lower limits of the membrane lipid transition decreased du