Stress Gradient Hypothesis
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Phylogenetic community structure reveals differences in plant community assembly of an oligotrophic white-sand ecosystem from the Brazilian Atlantic Forest
ABSTRACT Mussununga, an oligotrophic sandy savanna ecosystem, comprises distinct physiognomies along fire, water and nutrient availability gradients. Grasslands and woodlands are constrained at the opposite poles of these gradients, with grasslands occurring in areas with poorer soils and higher levels of both water-stress and fire intensity. According to th
Acta Bot. Bras.. Publicado em: 21/09/2017
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2. Plant facilitation and its implications for the dynamics and restoration of coastal dunes / Facilitação entre plantas e suas implicações para a dinâmica e restauração de restingas
Nas últimas duas décadas estudos empíricos têm demonstrado a importância da facilitação entre plantas, especialmente sob condições ambientais severas. Tal constatação inspirou a proposição da hipótese do gradiente de estresse (HGE), um modelo conceitual que prediz que a freqüência relativa entre facilitação e competição deve variar invers
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/06/2012
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3. Diversidade florística e estrutura filogenética de ilhas arbustivas em uma restinga subtropical / Floristic diversity and phylogenetic structure in woody islands of a subtropical coastal environment
Neste trabalho, avaliamos como arbustos pioneiros regulam comunidades lenhosas em uma restinga subtropical. Arbustos têm grande capacidade de modificar ecossistemas, pois alteram o fluxo de nutrientes e água do solo, aprisionam sementes transportadas por água ou vento sob suas copas, e oferecem recursos a dispersores. A combinação desses processos leva
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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4. Wall thickness of coronary vessels varies transmurally in the LV but not the RV: implications for local stress distribution
Since the right and left ventricles (RV and LV) function under different loading conditions, it is not surprising that they differ in their mechanics (intramyocardial pressure), structure, and metabolism; such differences may also contribute to differences in the coronary vessel wall. Our hypothesis is that intima-media thickness (IMT), IMT-to-radius (IMT-to
American Physiological Society.
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5. The Capacity for Thermal Protection of Photosynthetic Electron Transport Varies for Different Monoterpenes in Quercus ilex1
Heat stress resistance of foliar photosynthetic apparatus was investigated in the Mediterranean monoterpene-emitting evergreen sclerophyll species Quercus ilex. Leaf feeding with fosmidomycin, which is a specific inhibitor of the chloroplastic isoprenoid synthesis pathway, essentially stopped monoterpene emission and resulted in the decrease of the optimum t
American Society of Plant Biologists.
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6. Chitin Synthesis in Saccharomyces cerevisiae in Response to Supplementation of Growth Medium with Glucosamine and Cell Wall Stress
In Saccharomyces cerevisiae most chitin is synthesized by Chs3p, which deposits chitin in the lateral cell wall and in the bud-neck region during cell division. We have recently found that addition of glucosamine (GlcN) to the growth medium leads to a three- to fourfold increase in cell wall chitin levels. We compared this result to the increases in ce
American Society for Microbiology.