scholarly journals Strategies of organic phosphorus recycling by soil bacteria: acquisition, metabolism, and regulation

2022 ◽  
Author(s):  
Yeonsoo Park ◽  
Mina Solhtalab ◽  
Wiriya Thongsomboon ◽  
Ludmilla Aristilde
Keyword(s):  
Soil Bacteria ◽  
Organic Phosphorus ◽  
Phosphorus Recycling

scholarly journals Diversity of Beta-Propeller Phytase Genes in the Intestinal Contents of Grass Carp Provides Insight into the Release of Major Phosphorus from Phytate in Nature

2009 ◽  
Vol 75 (6) ◽  
pp. 1508-1516 ◽  
Author(s):  
Huoqing Huang ◽  
Pengjun Shi ◽  
Yaru Wang ◽  
Huiying Luo ◽  
Na Shao ◽  
...  
Keyword(s):  
Grass Carp ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Organic Phosphorus ◽  
Aquatic Communities ◽  
Intestinal Contents ◽  
Gradient Gel Electrophoresis ◽  
Unculturable Bacteria ◽  
Phosphorus Recycling ◽  
Dominant Bacteria

ABSTRACT Phytate is the most abundant organic phosphorus compound in nature, and microbial mineralization of phytate by phytase is a key process for phosphorus recycling in the biosphere. In the present study, beta-propeller phytase (BPP) gene fragments were readily amplified from the intestinal contents of grass carp (Ctenopharyngodon idellus) directly or from phytate-degrading isolates from the same source, confirming the widespread occurrence of BPP in aquatic communities. The amounts of sequences collected using these two methods differed (88 distinct genes versus 10 isolates), but the sequences showed the same general topology based on phylogenetic analysis. All of the sequences fell in five clusters and were distinct from those of Anabaena, Gloeobacter, Streptomyces, Flavobacterium, Prosthecochloris, and Desulfuromonas, which have never been found in the grass carp intestine. Analysis of the microbial diversity by denaturing gradient gel electrophoresis demonstrated that unculturable bacteria were dominant bacteria in the grass carp intestine and thus the predominant phytate-degrading organisms. The predominant cultured species corresponding to the phytate-degrading isolates, Pseudomonas, Bacillus and Shewanella species, might be the main source of known BPPs. A phytase from Brevundimonas was first obtained from cultured species. Combining our results with Lim et al.'s inference that phytate-mineralizing bacteria are widely distributed and highly diverse in nature (B. L. Lim, P. Yeung, C. Cheng, and J. E. Hill, ISME J. 1:321-330, 2007), we concluded that BPP is the major phytate-degrading enzyme in nature, that most of this enzyme might originate from unculturable bacteria, and that the distribution of BPP may be related to the type of niche. To our knowledge, this is the first study to experimentally estimate BPP diversity in situ.

scholarly journals Seasonal cycling of phosphorus in the southern bight of the North Sea

2004 ◽  
Vol 1 (1) ◽  
pp. 681-707 ◽  
Author(s):  
C. van der Zee ◽  
L. Chou
Keyword(s):  
North Sea ◽  
Seasonal Cycle ◽  
Organic Phosphorus ◽  
Phosphorus Limitation ◽  
Nutrient Concentrations ◽  
Southern Bight ◽  
The North ◽  
Phosphorus Recycling ◽  
Two Peaks ◽  
Inorganic And Organic

Abstract. We have investigated the seasonal cycle of nutrients and the phosphorus speciation, i.e. dissolved inorganic and organic phosphorus (DIP and DOP) and particulate inorganic and organic phosphorus (PIP and POP), for 10 stations in the Belgian coastal zone. The Belgian part of the southern North Sea is strongly influenced by the river plumes of the Rhine, Meuse and Scheldt. In winter, high nutrient concentrations are observed, whereas in April-May these have all been consumed during the spring bloom and silica or phosphorus limitation develops. The phosphate concentrations increase rapidly again in summer-fall, whereas nitrate and silicate return to their winter values much later. This shows the efficient phosphorus recycling that takes place in the water column. The DOP concentration exhibits two peaks during a seasonal cycle: one in April-May when the phosphate concentration is at its lowest and a second one in fall when the POP content decreases. This indicates two periods of increased phosphorus recycling activity. The seasonal cycle of the DOP is different from that of dissolved organic nitrogen (DON).

Herbivore defenses induced inArabidopsisby beneficial soil bacteria

2016 ◽  
Author(s):  
Mina Aziz
Keyword(s):  
Soil Bacteria ◽  
Herbivore Defenses

DIVERSITY OF SOIL BACTERIA AS INDICATOR OF SOIL POLLUTION IN MOLDAVIA REGION, ROMANIA

2017 ◽  
Vol 16 (4) ◽  
pp. 879-889 ◽  
Author(s):  
Florin Daniel Lipsa ◽  
Eugen Ulea ◽  
Andreea Mihaela Balau ◽  
Feodor Filipov ◽  
Evelina Cristina Morari
Keyword(s):  
Soil Pollution ◽  
Soil Bacteria

Soil organic phosphorus and the phosphorus nutrition of plants

1962 ◽  
Author(s):  
Gurcharan Singh Sekhon
Keyword(s):  
Organic Phosphorus ◽  
Phosphorus Nutrition ◽  
Soil Organic Phosphorus
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