Aerenchyma
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Response of rhizomes of the invasive Hedychium coronarium J. König (Zingiberaceae) to different soil moisture conditions
ABSTRACT The ability to maintain high competitiveness under a wide range of conditions is common among successful invasive species. The performance of rhizomatous macrophytes in different habitats is closely related to morphological and physiological adaptations in the rhizome system. We investigated the effects of soil moisture conditions on the microstruct
Acta Bot. Bras.. Publicado em: 2021-03
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2. Structural features of species of Asteraceae that arouse discussions about adaptation to seasonally dry environments of the Neotropics
ABSTRACT Seasonally-dry environments of the Neotropics, such as the South American Chaco, exert selective pressures on vegetation through a pronounced water deficit. We describe the underground system and leaf anatomy of three species of Asteraceae from the Brazilian portion of the Chaco (Pterocaulon purpurascens Malme, Wedelia trichostephia DC., and Pectis
Acta Bot. Bras.. Publicado em: 27/11/2017
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3. Anatomical and morphological modifications in response to flooding by six Cerrado tree species
Wetlands are common in the Cerrado (Brazilian savannas) biome, however flooding of these wetlands impairs growth and development of most plants. We evaluated flood tolerance of typical Cerrado trees. Seedlings of Aspidosperma macrocarpon (Apocynaceae), Tabebuia rosea (Bignoniaceae), Handroanthus chrysotrichus (Bignoniaceae), Myracrodruon urundeuva (Anacardia
Acta Bot. Bras.. Publicado em: 2015-12
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4. Nitrato no suprimento de nitrogênio para arroz cultivado sob alagamento / Nitrate to nitrogen supply to flooded rice
Em solos alagados, o amônio é a forma nitrogenada mais estável, ao contrário do nitrato, que é rapidamente perdido por desnitrificação. Por isso, pouca importância é dada ao nitrato como fonte de N para o arroz em solos alagados. Entretanto, a nitrificação na rizosfera e na superfície do solo pode fornecer nitrato para o arroz. Este trabalho, con
Publicado em: 2011
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5. Ciclo de vida, estrutura foliar e variações morfoanatômicas influenciadas por diferenças ambientais para Victoria amazonica (POEPP.) J.C. Sowerby (Nymphaeaceae) na Amazônia Central
The Amazon floodplains are specific ecosystems with high biodiversity and endemism, divided in varzeas, white fertile waters, and Igapos with poor and acid waters, black or clear, and mixed waters between the two typologies. This study aimed to characterize morphologically and anatomically leaf structure, germination and life cycle of Victoria amazonica (Poe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/10/2010
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6. Morfoanatomia de frutos e sementes em Apocynaceae / Morphoanatomy of fruits and seeds in Apoctnaceae
This paper had as objective contribute for the knowledge of Apocynaceae by a morph-anatomic survey data from fruits and seeds from species of the family. On this study, 13 species present in Brazil and distributed in three of the five families currently described, were included. Flowers, fruits and seeds in many development levels were collected, fixed and s
Publicado em: 2009
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7. EvoluÃÃo das caracterÃsticas morfoanatÃmicas nos ciclos de seleÃÃo do milho âSaracuraâ sob encharcamento intermitente / Evolution of morpho-anatomicals characteristics on selection cycles of maize (Zea mays L.) âSaracuraâ â BRS â 4154 under intermittent soil flooding
Although every single plant needs a certain amount of water, the excess around roots can cause severe injuries and even death of most crops. Soil flooding is one of the most important factors which affects maize crop production and development on tropical and subtropical regions. Excess of water blocks the oxygen transfer and others gases from soil to atmosp
Publicado em: 2009
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8. Anatomia de folhas e raízes de Aechmea lindenii (E. Morren) Baker var. lindenii (bromeliaceae)
Aechmea lindenii (E. Morren) Baker var. lindenii (Bromeliaceae-Bromelioideae) ocorre em restingas e Floresta Pluvial de Encosta Atlântica em Santa Catarina e Nordeste do Rio Grande do Sul, BR. Pode ser encontrada total ou parcialmente exposta à irradiação solar e em distintas formas de vida - terrícola, rupícola e epifítica. Apresenta variações morf
Publicado em: 2009
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9. Morphoanatomical characterization of Gentianaceaes species from cerrado and campo rupestre in Minas Gerais / Caracterização morfoanatômica de espécies de Gentianaceae ocorrentes em áreas de cerrado e de campo rupestre em Minas Gerais
The family Gentianaceae presents between 1600 and 1700 species predominantly herbaceous. In Brazil, 25 genera of this family occur mainly in the Cerrado and campos rupestres. The species are included into 6 tribes and 86 genera. The tribe Chironieae presents around 159 species distributed into 23 genera, such as Schultesia and Deianira. The tribe Helieae exh
Publicado em: 2008
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10. A flooding-induced xyloglucan endo-transglycosylase homolog in maize is responsive to ethylene and associated with aerenchyma.
Development of aerenchyma (soft cortical tissue with large intercellular air spaces) in flooded plants results from cell-wall hydrolysis and eventual cell lysis and is promoted by endogenous ethylene. Despite its adaptive significance, the molecular mechanisms behind aerenchyma development remain unknown. We recently isolated a flooding-induced maize (Zea ma
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11. Aerenchyma Carbon Dioxide Can Be Assimilated in Typha Iatifolia L. Leaves.
Leaf structural characteristics and gas-exchange measurements were used to determine whether photosynthetic tissue of Typha Iatifolia L. (cattail) utilized CO2 from the aerenchyma gas spaces, part of an internal pathway for gas transport in this wetland species. The partial pressure of CO2 (pCO2) in these aerenchyma gas spaces can be more than 10 times atmos
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12. Transduction of an Ethylene Signal Is Required for Cell Death and Lysis in the Root Cortex of Maize during Aerenchyma Formation Induced by Hypoxia.
Ethylene has been implicated in signaling cell death in the lysigenous formation of gas spaces (aerenchyma) in the cortex of adventitious roots of maize (Zea mays) subjected to hypoxia. Various antagonists that are known to modify particular steps in signal transduction in other plant systems were applied at low concentrations to normoxic and hypoxic roots o