Leaf characteristics and diurnal variation of chlorophyll fluorescence in leaves of the ‘bana’ vegetation of the amazon region

@article{Sobrado2008LeafCA,
  title={Leaf characteristics and diurnal variation of chlorophyll fluorescence in leaves of the ‘bana’ vegetation of the amazon region},
  author={M. A. Sobrado},
  journal={Photosynthetica},
  year={2008},
  volume={46},
  pages={202-207}
}
  • M. Sobrado
  • Published 1 June 2008
  • Environmental Science
  • Photosynthetica
In six dominant species of the Amazonian ‘Bana’ vegetation, leaf blade characteristics, pigment composition, and chlorophyll (Chl) fluorescence parameters were measured in young and mature leaves under field conditions. Leaf δ13C was comparable in the six species, which suggested that both expanding and expanded leaves contained organic matter fixed under similar intercellular and ambient CO2 concentration (Ci/Ca). High leaf C/N and negative δ15N values found in this habitat were consistent… 

Leaf and photosynthetic characteristics of pioneer and forest species in tropical montane habitats

  • M. Sobrado
  • Environmental Science
    Photosynthetica
  • 2008
Gas exchange and chlorophyll a fluorescence measurements of expanding and adult leaves of four plant species were compared under field conditions, suggesting the activation of photoprotective mechanisms.

Leaf Gas Exchange, Photon Capture and Light Harvest in Aldina heterophylla along a Vegetation Gradient in the Amazon Rainforest

The results indicate that the differences in the leaves and soil nitrogen concentrations are not enough to change the levels of gas exchange, and other environmental features may be driving the observed morphological features in this gradient, in particular, the tree height.

Leaf characteristics, wood anatomy and hydraulic properties in tree species from contrasting habitats within upper Rio Negro forests in the Amazon region

  • M. Sobrado
  • Environmental Science
    Journal of Tropical Ecology
  • 2010
Leaf blade physical and chemical characteristics, wood composition and anatomy, as well as long-term water-use efficiency and hydraulic characteristics of leaf-bearing terminal branches were assessed in tree species growing in contrasting forests of the Venezuelan Amazonas, suggesting species with more conservative water transport and/or better stomatal control would be at lower risk of mortality.

Response of photosynthesis and chlorophyll fluorescence quenching to leaf dichotocarpism in Ligustrum vicaryi, an ornamental herb

Net photosynthetic rate of yellow upper leaves (UL) of Ligustrum vicaryi was slightly, but not significantly higher than that of green lower leaves (LL). Diurnally, maximum photochemical efficiency

Leaf traits variation during leaf expansion in Quercus ilex L.

Variation in leaf size during leaf expansion might be attributed to a combination of cells density and length, and it is confirmed by the significant (p<0.001) correlations among these traits.

Cost-benefit relationships in sclerophyllous leaves of the ‘Bana’ vegetation in the Amazon region

A trade-off between investments in an expensive resistant sclerophyllous leaf which should maximize carbon gain in the long term is suggested.

Photosynthetic Traits of Spring Barley throughout Development Stages under Field Conditions

Photosynthetic traits are affected by many environmental factors, of which the most important ones are microclimate of crop stand and meteorological conditions. A 2-year field study was conducted to

Leaf tissue water relations and hydraulic properties of sclerophyllous vegetation on white sands of the upper Rio Negro in the Amazon region

  • M. Sobrado
  • Environmental Science
    Journal of Tropical Ecology
  • 2009
Abstract: The objective of this study was to explore the leaf tissue water relations in terminal branches, as well as the relations between xylem structure and function of five sclerophyllous species

Composition of photosynthetic organisms and diurnal changes of photosynthetic efficiency in algae and moss crusts

Later successional BSCs have a better photosynthetic performance and thus are expected to play a more effective role in desertification control, and photosynthetically active radiation (PAR) was a significant influencing factor in the down-regulation of Photosynthetic efficiency.

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