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Elevated Atmospheric CO2 and Drought Affect Soil Microbial Community and Functional Diversity Associated with Glycine max Rev. Bras. Ciênc. Solo
Wang,Junfeng; Wang,Yuhui; Song,Xinshan; Wang,Yuan; Lei,Xiaohui.
Abstract Under the background of climate change, the increase of atmospheric CO2 and drought frequency have been considered as significant influencers on the soil microbial communities and the yield and quality of crop. In this study, impacts of increased ambient CO2 and drought on soil microbial structure and functional diversity of a Stagnic Anthrosol were investigated in phytotron growth chambers, by testing two representative CO2 levels, three soil moisture levels, and two soil cover types (with or without Glycine max). The 16S rDNA and 18S rDNA fragments were amplified to analyze the functional diversity of fungi and bacteria. Results showed that rhizosphere microbial biomass and community structure were significantly affected by drought, but effects...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzyme activities; Microbial functional diversity; Fungi and bacteria; Relative abundance.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100430
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Molecular identification of differentially regulated genes in the hydrothermal-vent species Bathymodiolus thermophilus and Paralvinella pandorae in response to temperature ArchiMer
Boutet, Isabelle; Jollivet, Didier; Shillito, Bruce; Moraga, Dario; Tanguy, Arnaud.
Background: Hydrothermal vents and cold seeps represent oases of life in the deep-sea environment, but are also characterized by challenging physical and chemical conditions. The effect of temperature fluctuations on vent organisms in their habitat has not been well explored, in particular at a molecular level, most gene expression studies being conducted on coastal marine species. In order to better understand the response of hydrothermal organisms to different temperature regimes, differentially expressed genes (obtained by a subtractive suppression hybridization approach) were identified in the mussel Bathymodiolus thermophilus and the annelid Paralvinella pandorae irlandei to characterize the physiological processes involved when animals are subjected...
Tipo: Text Palavras-chave: Oyster crassostrea gigas; Heat shock protein; Mid atlantic ridge; Cytosolic malate dehydrogenases; Extracellular hemoglobins; Lipid peroxidation; Northeast pacific; Enzyme activities; Arginine kinase; Dual symbiosis.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00129/24014/21970.pdf
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Soil enzyme activities under long-term tillage and crop rotation systems in subtropical agro-ecosystems BJM
Balota,Elcio Liborio; Kanashiro,Miriam; Colozzi Filho,Arnaldo; Andrade,Diva Souza; Dick,Richard Peter.
Agricultural practices that reduce soil degradation and improve agricultural sustainability are needed particularly for tropical/subtropical soils. No-tillage planting causes minimal soil disturbance and combined with crop rotation may hold potential to meet these goals. Soil enzyme activities can provide information on how soil management is affecting the potential to perform the processes in soils such as decomposition and nutrient cycling. Soil enzyme activities were investigated in a split-plot experiment (3 replications) where tillage (no till and conventional) was the main plot and crop rotation (soybean/wheat, S/W; maize/wheat, M/W or cotton/wheat, C/W) was the subplot. The experiment was established in 1976 in southern Brazil. Soil samples were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzyme activities; Tillage systems; Crop rotation; Soil management; Soil quality.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300006
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Waterlogging-induced changes in fermentative metabolism in roots and nodules of soybean genotypes Scientia Agricola
Borella,Junior; Amarante,Luciano do; Oliveira,Denise dos Santos Colares de; Oliveira,Ana Claudia Barneche de; Braga,Eugenia Jacira Bolacel.
Waterlogging blocks the oxygen supply to the root system which inhibits respiration, and greatly reduces the energy status of cells that affect important metabolic processes. This study evaluated fermentative metabolism and carbohydrate contents in the root system of two soybean (Glycine max L. Merril) genotypes under hypoxic and post-hypoxic conditions. Nodulated plants (genotypes Fundacep 53 RR and BRS Macota) were grown in vermiculite and transferred to a hydroponic system at the reproductive stage. The root system was submitted to hypoxia by flowing N2 (nitrogen) gas in a solution for 24 and 72 h. For recovery, plants returned to normoxia condition by transfer to vermiculite for 24 and 72 h. Fermentative enzyme activity, levels of anaerobic metabolites...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Oxygen deficiency; Enzyme activities; Anaerobic metabolites; Sugars.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000600009
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