Buscar
Mostrando ítems 1-10 de 529
Understanding photosynthesis in a spatial–temporal multiscale: The need for a systemic view
(2021-01-01)
In October 2020, at the peak of the COVID-19 pandemic, a group of young Brazilian photosynthesis researchers organized the 1st Brazilian Symposium on Photosynthesis. The event was free and online, with the presence of ...
Effect of leaf rust (Puccinia triticina) on photosynthesis and related processes of leaves in wheat crops grown at two contrasting sites and with different nitrogen levels
(Elsevier Science, 2011-11)
Leaf rust is one of the main diseases affecting wheat yield production. Considering the physiological variables that determine yield, diseases could affect radiation capture and/or radiation use efficiency. Reductions in ...
Seasonal effects on the relationship between photosynthesis and leaf carbohydrates in orange trees
(CSIRO Publishing, 2012-01-01)
To understand the effect of summer and winter on the relationships between leaf carbohydrate and photosynthesis in citrus trees growing in subtropical conditions, 'Valencia' orange trees were subjected to external manipulation ...
Photosynthetic responses to temperature in tropical lotic macroalgae
(2004-06-01)
A comparative analysis of the photosynthetic responses to temperature (10-30°C) was carried out under short-term laboratory conditions by chlorophyll fluorescence and oxygen (O2) evolution. Ten lotic macroalgal species ...
Daily dynamics of photosynthesis of the freshwater red alga Sirodotia delicatula (Batrachospermales, Rhodophyta)
(Wiley-Blackwell Publishing, Inc, 2009-12-01)
P>The daily course of photosynthetic parameters of a population of the freshwater red alga Sirodotia delicatula from São Paulo State, Brazil (20 degrees 43'24 ' S, 49 degrees 18'21 ' W) was investigated under natural and ...
Oxidative Stress, Nutritional Disorders, and Gas Exchange in Lettuce Plants Subjected to Two Selenium Sources
(Springer, 2020-03-05)
Selenium (Se) is microelement beneficial to plants and essential to animals and humans. Supply of Se shows positive effects on plant growth, but high concentrations affect its growth. This study is based on the hypothesis ...
Effects of nitrate and phosphate availabilities on growth, photosynthesis and pigment and protein contents in colour strains of Hypnea musciformis (Wulfen in Jacqu.) J.V. Lamour. (Gigartinales, Rhodophyta)
(Sociedade Brasileira de Farmacognosia, 2011-04-01)
In Brazil, Hypnea musciformis is the main raw material for carrageenan production and the knowledge of nitrogen and phosphorus metabolism in algae is critical for the success of cultivation because these elements can limit ...
Photosynthetic pathway variation among C4 grasses along a precipitation gradient in Argentina
(Wiley Blackwell Publishing, Inc, 2008-01)
Aim Based on the biochemical and physiological attributes of C4 grasses, and on the close association between decarboxylation pathways and the taxa in which they evolved, the hypotheses tested were: (1) that C4 grasses ...
Macroclimatic niche limits and the evolution of C4 photosynthesis in Gomphrenoideae (Amaranthaceae)
(Oxford University Press, 2017-07)
During the evolution of vascular plants, C4 photosynthesis has developed > 60 times, but most studies concerning the evolution and the ecophysiological advantages of the C4 syndrome have been carried out in grasses. Among ...
Photosynthetic performance of freshwater Rhodophyta in response to temperature, irradiance, pH and diurnal rhythm
(2001-12-01)
Responses of net photosynthetic rates to temperature, irradiance, pH/inorganic carbon and diurnal rhythm were analyzed in 15 populations of eight freshwater red algal species in culture and natural conditions. Photosynthetic ...