scholarly journals QUANTITATIVE AND QUALITATIVE ENUMERATION OF SOIL MYCOFLORA IN BRINJAL CROP FIELDS.

2017 ◽  
Vol 8 ◽  
Author(s):  
Ramaraju Cherkupally ◽  
Hindumathi Amballa Bhumi Narasimha Reddy
Keyword(s):  
Aspergillus Niger ◽  
Key Words ◽  
Rhizosphere Soil ◽  
Fungal Flora ◽  
Rhizosphere Soils ◽  
Crop Fields ◽  
Predominant Species ◽  
Study Results ◽  
Soil Mycoflora

<p>A total of 36 species of fungi belonging to 15 genera were isolated from brinjal crop fields of Kodad. The present study results clearly revealed that the rhizosphere and non-rhizosphere soil showed variation in diversity of mycoflora.<em>  Aspergillus</em> was observed to be an important component of the present rhizosphere and non-rhizosphere soil fungal flora constituting 70.54% and 58.96% respectively, and <em>Aspergillus niger</em> was observed to be predominant species in the rhizosphere and non-rhizosphere soils.</p><p><strong>Key words</strong>: microflora, non-rhizosphere, rhizosphere<strong></strong></p>

APPLYING VALUE UTERINE DOPPLER ASSOCIATED WITH PREECLAMPSIA

2016 ◽  
pp. 57-64
Author(s):  
Thi Linh Giang Truong ◽  
Vu Quoc Huy Nguyen ◽  
Quang Vinh Truong ◽  
Van Duc Vo
Keyword(s):  
Cohort Study ◽  
Key Words ◽  
Doppler Ultrasound ◽  
Prospective Cohort Study ◽  
Prospective Cohort ◽  
Fetal Distress ◽  
Central Hospital ◽  
Study Results ◽  
Key Words Doppler

Background: Study on the correlation between the values of the Uterine Doppler with the type of preeclamsia and using uterine Doppler and predict fetal distress. Methods: Study on 116 patients with pre-eclampsia at Obs. & Gyn. Department - Hue Central Hospital were taken by an prospective cohort study. Results: There was correlation between morphology of uterine Doppler waves with the type of preeclamsia and fetal distress. Among 46 patients with server preeclamsia, the rate of abnormal of waves uterine Doppler is 78,2 %, and the rate of abnormal of waves uterine Doppler is 22% and fetal. This research also evaluate the relation between uterine Doppler with the fetal distress. The group patients with fetal distress also have the rate of abnormal uterine Doppler is 86,6% and the rate of nomal uterine dopple is 13,4 %. Conclusion: There was the correlation between the values of the Uterine Doppler with the type of preeclamsia and predict fetal distress. The value of uterine Doppler ultrasound can be predict the ricks happening for mother and fetal distress with preeclampsia. Key words: Doppler ultrosound, uterine Doppler, fetal distress, preeclampsia, IUGR.

scholarly journals Knowledge, Attitude and Behaviour among dental students concerning infection control measures.

2019 ◽  
Author(s):  
Aditi Sharma ◽  
Rajashri Kolte ◽  
Abhay Kolte
Keyword(s):  
Hepatitis B ◽  
Infection Control ◽  
Key Words ◽  
Dental Students ◽  
Control Measures ◽  
Key Words Infection ◽  
Infection Control Measures ◽  
Tetanus Vaccine ◽  
Study Results ◽  
Level Of Knowledge

Aim: The aim was to evaluate the knowledge, attitude and behaviour of dental students concerning infection control measures and to check the correlation, if any, among knowledge, attitude and behaviour of dental students concerning infection control measures in dental setups. Materials and Methods: A total of 1200 students from first to final year and interns from three different colleges were included in the study. Results: A total of 95.83% think isolation is important. Only 4.1% have been vaccinated with hepatitis B vaccine and 95% with tetanus vaccine. Conclusion: The level of knowledge and behaviour of infection control measures was average, for which the reasons could be inadequate training, supply of protective equipments and mainly carelessness. Key Words- Infection control, Vaccination, Isolation.

Occurrence of Fusarium spp. associated with root tissues and rhizosphere soils of forest trees and assessment of their pathogenicity on Prunus amygdalus seedlings

2010 ◽  
Vol 58 (8) ◽  
pp. 679 ◽  
Author(s):  
K. Chehri ◽  
B. Salleh ◽  
M. J. Soleimani ◽  
K. R. N. Reddy ◽  
L. Zakaria
Keyword(s):  
Rhizosphere Soil ◽  
Morphological Characteristics ◽  
Soil Samples ◽  
Forest Trees ◽  
Prunus Amygdalus ◽  
Fusarium Spp ◽  
The West ◽  
Rhizosphere Soils ◽  
Climatic Regions ◽  
Root Tissues

Occurrence, distribution and pathogenicity of Fusarium spp. associated with roots and rhizosphere soils of forest trees were studied. Fusarium spp. was isolated from phloem and sapwood of forest trees and composite rhizosphere soil samples collected from highly diversified geographical and climatic regions of the west of Iran and identified based on their morphological characteristics. Only three Fusarium spp. (F. oxysporum, F. solani and F. eumartii) was isolated from roots. F. nygamai, F. graminearum, F. scirpi, F. proliferatum, F. anthophilum, F. longipes and F. chlamydosporum were recovered from soil samples collected from warm and moderately warm regions, while F. culmorum, F. sporotrichioides, F. sambucinum and F. subglutinans were recovered from cold regions. F. solani, F. oxysporum, F. semitectum, F. equiseti, F. verticillioides, F. merismoides and F. avenaceum were present in all climatic regions. In the bark inoculation tests, selected Fusarium strains representing all species were evaluated for their pathogenicity on stems of healthy Prunus amygdalus under greenhouse conditions. Stem rot assessment revealed that F. oxysporum, F. solani and F. eumartii were the most damaging species.

Microbial activity and diversity in the rhizosphere soil of the invasive species Zizania latifolia in the wetland of Wuchang Lake, China

2020 ◽  
Vol 71 (12) ◽  
pp. 1702
Author(s):  
Baohua Zhou ◽  
Zhaowen Liu ◽  
Guo Yang ◽  
Hui He ◽  
Haijun Liu
Keyword(s):  
Invasive Species ◽  
Rhizosphere Soil ◽  
Remote Sensing Data ◽  
Wetland Loss ◽  
Freshwater Wetlands ◽  
Total Carbon ◽  
Freshwater Wetland ◽  
Available Nitrogen ◽  
Zizania Latifolia ◽  
Rhizosphere Soils

Information about the consequences of invasive species overgrowing freshwater wetlands is limited. According to remote sensing data, the invasive species Zizania latifolia spreads at an annual rate of 1.78km2 in the freshwater wetland of Wuchang Lake, China, resulting in wetland loss and degradation due to the overgrowth. This species not only increases soil organic matter, total carbon, total nitrogen, total sulfate, available nitrogen and the C/N ratio in the rhizosphere soil, but also results in increased urease, sucrose and catalase activity, as well as fluorescein diacetate hydrolysis. In this study, we have analysed microbial diversity in rhizosphere soils among different habitat types of Z. latifolia. Microbial communities in different habitats invaded by Z. latifolia differed considerably at the genus level, although all soil samples were predominated by the phyla Proteobacteria, Acidobacteria and Chloroflexi. The dominant bacterial taxa in the rhizosphere soil from the floating blanket included Acidimicrobiales, Thiomonas, Alicyclobacillus, Acetobacteraceae and Acidocella, whereas those in rhizosphere soils from the lake sludge were Acidobacteria, Anaerolineaceae, Bacteroidetes and Nitrospirae. The bacterial community in the rhizosphere soil differed significantly from that in the non-rhizosphere soil. Z. latifolia potentially creates suitable habitats and provides substrate for a unique set of microbes, further facilitating the succession of this species.

Relative efficiency of rhizobacteria for auxin biosynthesis in rhizosphere and non-rhizosphere soils

Soil Research ◽  
2004 ◽  
Vol 42 (8) ◽  
pp. 921 ◽  
Author(s):  
Azeem Khalid ◽  
Shermeen Tahir ◽  
Muhammad Arshad ◽  
Zahir Ahmad Zahir
Keyword(s):  
High Performance ◽  
Indole Acetic Acid ◽  
Microbial Population ◽  
Rhizosphere Soil ◽  
Root Exudation ◽  
Auxin Biosynthesis ◽  
Rhizosphere Soils ◽  
Auxin Synthesis ◽  
Plant Crop

Biosynthesis of auxins in the rhizosphere of different crops may vary because of quantitative and qualitative variations in microbial population and root exudation. A laboratory study was conducted to assess in vitro auxin biosynthesis, and biosynthesis in rhizosphere and non-rhizosphere soils of different crops (maize, sorghum, mungbean, cotton). Soils were inoculated with selected rhizobacteria with and without the auxin precursor L-tryptophan (L-TRP). Auxins were detected by colourimetry as indole acetic acid equivalents and confirmed by high performance liquid chromatography. Results revealed that 83% of the 60 rhizobacteria were capable of producing auxins in the absence of L-TRP. Auxin biosynthesis by the 8 most efficient rhizobacteria ranged from 5.0 to 12.1 mg/L broth medium. A comparison of rhizosphere v. non-rhizosphere soils indicated a greater accumulation of auxins in the rhizosphere soils than non-rhizosphere soils. Overall, inoculation of rhizosphere soils with selected rhizobacteria resulted in greater production of auxin (up to 10.4 mg/kg soil) than in inoculated non-rhizosphere soils (up to 5.76 mg/kg). Moreover, efficiency of these rhizobacteria for auxin biosynthesis in both rhizosphere and non-rhizosphere soils differed with crop and bacterial strain. Some rhizobacterial strains exhibited superiority over the indigenous microflora for auxin biosynthesis in soil. Application of L-TRP promoted auxin biosynthesis in both rhizosphere and non-rhizosphere soils. These findings imply that inoculation with suitable strains and/or amendment with L-TRP could promote auxin synthesis in the rhizosphere soil of a given crop, which may have consequences for better plant/crop growth.

MANOMETRIC STUDIES WITH RHIZOSPHERE AND NON-RHIZOSPHERE SOIL

1957 ◽  
Vol 3 (5) ◽  
pp. 673-678 ◽  
Author(s):  
H. Katznelson ◽  
J. W. Rouatt
Keyword(s):  
Amino Acids ◽  
Oxygen Consumption ◽  
Oxygen Uptake ◽  
Organic Acids ◽  
Metabolic Activity ◽  
Rhizosphere Soil ◽  
Rhizosphere Soils ◽  
Manometric Studies ◽  
Casamino Acids

Manometric studies were carried out on the metabolic activity of different rhizosphere and non-rhizosphere soils from the greenhouse and the field. Oxygen consumption was distinctly greater with the rhizosphere soils. On the addition of substrates such as casamino acids or a mixture of carbohydrates and organic acids, greater oxygen uptake again occurred with the rhizosphere soils and was particularly striking with the amino acids. Chromatographic studies of extracts of rhizosphere and non-rhizosphere soil incubated with casamino acids suggested that certain amino acids such as arginine, proline, and tyrosine may be preferentially utilized in the rhizosphere.

Recherche de nouvelles activités saccharifiantes thermostables chez les champignons filamenteux

1990 ◽  
Vol 36 (9) ◽  
pp. 625-630 ◽  
Author(s):  
P. Vanacker ◽  
B. Bacle ◽  
G. Vidal ◽  
L. Lacoste
Keyword(s):  
Aspergillus Niger ◽  
Aspergillus Fumigatus ◽  
Key Words ◽  
Filamentous Fungi ◽  
Half Life ◽  
The Other ◽  
Thermostable Enzymes ◽  
Life Measure ◽  
Industrial Use ◽  
Better Than

We have searched for producers of a saccharifying activity with improved thermostability compared with industrial amyloglucosidases. These producers were chosen among thermophilic, thermotolerant, or even mesophilic fungi. Among the 846 isolated strains, five species (two Thermoascus spp., a member of the Aspergillus fumigatus group, and two members of the Aspergillus niger group) showed an amyloglucosidasic complex with the required property. Whereas the first three of these were thermophilic or thermotolerant strains, the latter two strengthen the idea that mesophilic strains can produce thermostable enzymes. The thermostability of the saccharifying complex of the Thermoascus spp., established with a half-life measure, was found to be far better than the other ones. The industrial use of these strains was discussed, and Thermoascus crustaceus seems to be the most advantageous one. Key words: filamentous fungi, amyloglucosidases, thermostability, Thermoascus.

Chemistry of root exudates and rhizosphere soils of prairie plants

1979 ◽  
Vol 57 (13) ◽  
pp. 1473-1477 ◽  
Author(s):  
U. G. Bokhari ◽  
D. C. Coleman ◽  
Amy Rubink
Keyword(s):  
Amino Acids ◽  
Nutrient Cycling ◽  
Root Exudates ◽  
Microbial Growth ◽  
Rhizosphere Soil ◽  
Soluble Sugars ◽  
The Other ◽  
Blue Grama ◽  
Rhizosphere Soils ◽  
Prairie Plants

Root exudates may have important effects on microbial growth and nutrient cycling in many ecosystems. We examined exudation patterns of two dominant plants in the shortgrass prairie.Root exudates of mature blue grama plants contained greater amounts of carbohydrates than younger plants, whereas the latter exuded slightly more amino N than the older plants. Axenic seedlings exuded larger amounts of sugars than normal seedlings; however, there was no difference in the amounts of amino N exuded. Among the amino acids exuded by axenic seedlings the levels of proline, methionine, and glutamic acids were higher than those of the other amino acids. The rhizosphere soil of both blue grama and fringed sagewort had more soluble sugars than the nonrhizosphere soil while the latter had more nonsoluble sugars. Both soluble and nonsoluble amino N were in greater concentrations in the nonrhizosphere soil of blue grama and fringed sagewort than in the rhizosphere soil of the same species. Rhizosphere soil of the above two species contained more polyphenols than the nonrhizosphere soil. Trace amounts of terpenes were found only in the soil associated with fringed sagewort.

Nitrification potential in the rhizosphere of Australian native vegetation

Soil Research ◽  
2017 ◽  
Vol 55 (1) ◽  
pp. 58 ◽  
Author(s):  
Saikat Chowdhury ◽  
Ramya Thangarajan ◽  
Nanthi Bolan ◽  
Julianne O'Reilly-Wapstra ◽  
Anitha Kunhikrishnan ◽  
...  
Keyword(s):  
Plant Growth ◽  
Microbial Activity ◽  
Plant Species ◽  
Native Plants ◽  
Rhizosphere Soil ◽  
Native Vegetation ◽  
Rhizosphere Soils ◽  
Nitrification Potential ◽  
Growth Experiments ◽  
Australian Native Plants

The rhizosphere influences nutrient dynamics in soil mainly by altering microbial activity. The objective of this study was to evaluate the rhizosphere effect on nitrogen transformation in Australian native vegetation in relation to nitrification potential (NP). Microbial activity, NP, and nitrifiers (ammonia-oxidising bacteria, AOB) were compared between rhizosphere and non-rhizosphere soils of several Australian native vegetation under field conditions. These parameters were also measured with increasing distance from the rhizosphere of selected plant species using plant growth experiments. To examine the persistence of nitrification inhibitory activity of rhizosphere soil on non-rhizosphere soil, the soils were mixed at various ratios and examined for NP and AOB populations. The rhizosphere soil from all native vegetation (29 species) had higher microbial activity than non-rhizosphere soil, whereas 13 species showed very low NP in the rhizosphere when compared with non-rhizosphere soil. Nitrification potential and AOB populations obtained in the soil mixture were lower than the predicted values, indicating the persistence of a nitrification inhibitory effect of the rhizosphere soils on non-rhizosphere soils. In plant growth experiments the microbial activity decreased with increasing distance from rhizosphere, whereas the opposite was observed for NP and AOB populations, indicating the selective inhibition of nitrification process in the rhizosphere of the Australian native plants Scaevola albida, Chrysocephalum semipapposum, and Enteropogon acicularis. Some Australian native plants inhibited nitrification in their rhizosphere. We propose future studies on these selected plant species by identifying and characterising the nitrification inhibiting compounds and also the potential of nitrification inhibition in reducing nitrogen losses through nitrate leaching and nitrous oxide emission.

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