scholarly journals Apophysomyces jiangsuensis sp. nov., a Salt Tolerant and Phosphate-Solubilizing Fungus from the Tidelands of Jiangsu Province of China

2020 ◽  
Vol 8 (12) ◽  
pp. 1868
Author(s):  
Siyu Li ◽  
Ruiming Han ◽  
Huanshi Zhang ◽  
Yongchun Song ◽  
Fugeng Zhao ◽  
...  
Keyword(s):  
Organic Acids ◽  
Low Molecular Weight ◽  
The Novel ◽  
Dissolved Phosphorus ◽  
Coastal Salt Marsh ◽  
Optimum Growth Temperature ◽  
Distance Analysis ◽  
Culture Liquor ◽  
Phosphate Solubilizing ◽  
Genetic Distance Analysis

A newly isolated phosphate-solubilizing fungus from the topsoil of Spartina alterniflora habitats in Yancheng coastal salt marsh was cultivated. Scanning electron microscopy observation revealed that the sporangia are nearly spherical, peach-shaped, and the spores formed on the top of sporangia. The spores are ellipsoidal with raised white nubbins on the surface. Based on a polyphasic study and the genetic distance analysis referring to the sequence analysis of ITS (ITS1 + 5.8S + ITS2) and 28S rDNA (D1/D2 domains) genes, the novel species belongs to the genus Apophysomyces and is named as A. jiangsuensis. The optimum growth temperature and salinity of the new species were 28 °C and 1.15% NaCl, respectively. A study of its phosphate-solubilizing ability revealed that the fungus had an obvious decomposition effect on lecithin, Ca3(PO4)2, and AlPO3, respectively. The pH of the fermented liquid progressively decreased from 6.85 to 2.27 after 7 days of incubation, indicating that the low molecular weight organic acids excreted into the culture liquor were oxalic, succinic, and malic acids and a trace amount of citric acid. Among these, oxalic acid was the major organic acid, and its amount reached 652.5 mg/L. These results indicated that the main mechanism underlying the dissolved phosphorus was related to the secretion of large amounts of organic acids.

Genetic distance analysis among nine endogamous population groups of Maharashtra, India

1979 ◽  
Vol 8 (6) ◽  
pp. 567-570 ◽  
Author(s):  
B.N. Mukherjee ◽  
P.P. Majumder ◽  
K.C. Malhotra ◽  
S.K. Das ◽  
S.L. Kate ◽  
...  
Keyword(s):  
Genetic Distance ◽  
Population Groups ◽  
Distance Analysis ◽  
Endogamous Population ◽  
Genetic Distance Analysis

scholarly journals INFLUENCE OF VARIOUS FEED ADDITIVES ON THE ACTIVITY OF CHYME AND BLOOD PLASMA ENZYMES OF YOUNG MEAT CHICKEN OF ORIGINAL LINE

THE BULLETIN ◽  
2021 ◽  
Vol 2 (390) ◽  
pp. 12-17
Author(s):  
A. Grozina
Keyword(s):  
Molecular Weight ◽  
Organic Acids ◽  
Blood Plasma ◽  
Digestive Enzymes ◽  
Feed Additives ◽  
Pancreatic Enzymes ◽  
Control Group ◽  
Physiological Status ◽  
Low Molecular Weight ◽  
Original Line

The research aimed to determine the effect of a mixture of low molecular weight organic acids and complex phytobiotics when replacing a feed antibiotic with them on the activity of digestive enzymes in the duode-nal chyme and the activity of pancreatic enzymes in the blood plasma of young stock B5 and B9 meat chicken lines. The experiments were carried out on the original lines of meat poultry lines B5 (Cornish) and B9 (Plymouth rock). There was an operation to insert a cannula into the duodenum at the age of 6 weeks. The enzymatic activity of the duodenum chyme and the content of pancreatic enzymes in the blood plasma in the groups of chickens receiving antibiotics, low molecular weight organic acids, and phytobiotics with the diet. The data showed that the influence of feed additives on the physiological status of poultry was different. The use of low molecular weight organic acids of the B5 and B9 chicken lines had a significant effect on the production of digestive enzymes due to an increase in the activity of chyme lipase (by 98.3%) and blood plasma lipase (by 26.6%) in B9 chickens and an increase in chyme proteases (by 30.9%) in B5 chickens compared with the control group, where the antibiotic was used. The introduction of complex phytobiotics into the diet had a negative effect on chickens of the B5 line (Cornish), reducing the activity of amylase and lipase of the duodenal chyme (by 29.2 and 26.9%) compared with the control group. In B9 (Plymouth rock) chickens, only the chyme amylase activity increased by 30.8% that indicates an improvement in the availability of feed carbohydrates. These data confirm the need to take into account the different effects of feed additives on the digestion processes in different poultry crosses.

scholarly journals Short-term effects of phosphate fertilizer enriched with low molecular weight organic acids on phosphorus release kinetic and availability under calcareous conditions in arid region

2018 ◽  
Vol 2 ◽  
pp. 66
Author(s):  
Adil Mihoub ◽  
Mustapha Daddi Bouhoun ◽  
Asif Naeem
Keyword(s):  
Molecular Weight ◽  
Acid Solution ◽  
Organic Acids ◽  
Phosphorus Release ◽  
Favorable Effect ◽  
Available Phosphorus ◽  
Low Molecular Weight ◽  
Release Kinetic ◽  
P Availability ◽  
Phosphate Fertilizers

Phosphate reactions and retention in the soil are of paramount importance from the perspective of plant nutrition and fertilizer use efficiency. The objective of this work was to investigate the effect of some low molecular weight organic acids (LMWOAs) on phosphorus release kinetic and its availability in calcareous soil. Experiments were conducted in laboratory. Soil-limestone mixtures were prepared to achieve highly calcareous samples (i.e. 50% CaCO3). The prepared samples were mixed thoroughly with phosphate fertilizers i.e. Triple super phosphate (TSP) and Monoammonium Phosphate (MAP) and watered with distilled water only (CK), with citric acid solution (CA) and with oxalic acid solution (OA). The treatments were arranged in a CRD with three replications and incubated at 25 ± 2°C and 80% soil moisture for a period of 960 h. The parabolic model was used for describing the decrease in P with time. As a result, all treatments showed a significant decrease in available P with time. Using LMWOAs showed important results and combination of phosphate fertilizers with both LMWOAs solutions exerted a very favorable effect on P availability in soil. The parabolic diffusion equation used was fitted well to experimental data. Addition of LMWOAs decreased loss in extractability of P with increasing soil available phosphorus fraction. Moreover, treatments irrigated by LMWOAs solutions released a lot of phosphorus compared to untreated treatments.

Water-soluble low-molecular-weight organic acids in automorphic loamy soils of the tundra and taiga zones

2013 ◽  
Vol 46 (6) ◽  
pp. 654-659 ◽  
Author(s):  
E. V. Shamrikova ◽  
I. V. Gruzdev ◽  
V. V. Punegov ◽  
F. M. Khabibullina ◽  
O. S. Kubik
Keyword(s):  
Molecular Weight ◽  
Organic Acids ◽  
Water Soluble ◽  
Low Molecular Weight
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