scholarly journals Состав энтомопатогенных видов гифальных грибов с пораженных гусениц хлопковой совки

2020 ◽  
Vol 1 (1) ◽  
pp. 14-23
Author(s):  
Сардоржон Авазов ◽  
Саидинаби Хасанов

В статье обсуждаются вопрос поиска энтомопатогенных грибов, выявленных с пораженных гусениц хлопковой совки на посевах хлопчатника и овощных культур. В результате выделено 20 видов энтомопатогенных гифальных микромицетов из 12 родов, 3 семейств грибов. Была проверена вирулентность выявленной микобиоты.  Из представленных данных следует, что процент поражения гусениц восковой моли в опыте при искусственном заражении колеблется в пределах от 2 до 25%. Отмечено, что гибель гусениц в течение 20 дней отмечалась лишь в случае со штаммами видов Aspergillus fumigates (4% гусениц погибли), Aspergillus flavus, Trichotecium roseum,  Spicaria heliothis и Fusarium lateritium вызвали гибель 2% гусениц. На основании полученных данных был сделан вывод, что выявленные виды в той или иной степени обладают определенными энтомопатогенными свойствами, но данные штаммы ввиду слабой вирулентности для насекомых не могут быть примененными в практических целях.  

2020 ◽  
Vol 1 (1) ◽  
pp. 14-23
Author(s):  
Сардоржон Авазов ◽  
Саидинаби Хасанов

В статье обсуждаются вопрос поиска энтомопатогенных грибов, выявленных с пораженных гусениц хлопковой совки на посевах хлопчатника и овощных культур. В результате выделено 20 видов энтомопатогенных гифальных микромицетов из 12 родов, 3 семейств грибов. Была проверена вирулентность выявленной микобиоты.  Из представленных данных следует, что процент поражения гусениц восковой моли в опыте при искусственном заражении колеблется в пределах от 2 до 25%. Отмечено, что гибель гусениц в течение 20 дней отмечалась лишь в случае со штаммами видов Aspergillus fumigates (4% гусениц погибли), Aspergillus flavus, Trichotecium roseum,  Spicaria heliothis и Fusarium lateritium вызвали гибель 2% гусениц. На основании полученных данных был сделан вывод, что выявленные виды в той или иной степени обладают определенными энтомопатогенными свойствами, но данные штаммы ввиду слабой вирулентности для насекомых не могут быть примененными в практических целях.  


2018 ◽  
Vol 25 (09) ◽  
pp. 1417-1420
Author(s):  
Waseem Ahmad ◽  
Muhammad Iqbal ◽  
Gohar Amin

Background: Nasal polyposis is a provocative situation of indefinite etiology thatinvolve nasal as well as sinus mucous membrane. Quality of life of a person can damage by nasalimpediment due to these nasal polyps. Further, it can cause of persistent postnasal drainage,hyposmia, sinusitis, taste sense change even bony demolition. It shows that inflammationreason a reactive hyperplasia of intra-nasal mucosal membrane resulted in the polyp formation.Objectives: To discover the kind of fungus concerned in nasal polyps fungal. Study Design:Descriptive study. Setting: ENT department of Sir Ganga Ram Hospital Lahore. Period: 1stJanuary 2017 to 30th June 2017. Materials and Methods: In microbiology department, thesecollected samples were processed to check the involvement of fungal. Out of all, 118 caseswere included in this study which culture was positive. Increase for microscopic assessment,mycological culture to determine the involvement of fungal and fungus kind, these sampleswere processed for diagnosis by potassium hydroxide (KOH). By using seaboard dextroseagar at 25ºC and 37ºC the fungal culture was done. Periodically it was identified through culturecharacteristics & microscopy if growth was present. Results: In this study, 118 culture positivesamples were included. In 82 cases Aspergillus Spp. was observed among positive specimens;In 32 samples Aspergillus flavus was observed while in 10 samples Aspergillus fumigates wasfound and species was not cleared in 40 samples. The fungal element was isolated in 36samples but genus was not determined. Conclusion: In fungal nasal polyposis, AspergillusSpp. is very general pathogen and we observed in our study that Aspergillus flavus is verycommon agent.


2021 ◽  
Vol 11 (3) ◽  
pp. 279-284
Author(s):  
Dipannita Deka ◽  
◽  
Pinky Bora ◽  
Nameirakpam Nirjanta Devi ◽  
Mayuri Chabukdhara ◽  
...  

Heavy metal pollution in the aquatic ecosystem poses a serious threat to the human health and aquatic biodiversity around. There is urgent need to remediate heavy metals contaminated wastewater through eco friendly ways. Fungi and other microorganisms have been reported to have promising potential to remove heavy metals from wastewater through biosorption. Thus the present work aimed to isolate tolerant fungal species from different sites of a polluted river Bharalu in Assam. After preliminary screening, out of a total of 15 fungal isolates obtained, 4 isolates Aspergillus niger, Aspergillus flavus, Aspergillus fumigates and Colletotrichum gloeosporioides were selected for further study. Tolerance limit of the isolates for Cadmium (Cd) was carried out at concentrations ranging from 100 ppm to 1000 ppm. Results showed that the maximum tolerance was observed in Colletotrichum gloeosporioides (approx. 8.8 mm), followed by Aspergillus flavus (approx. 5.8 mm) at 400ppm. The biosorption efficiency at 400ppm revealed that the maximum Cd concentration was absorbed by fungal biomass of Colletotrichum gloeosporioides (12.83 mg/g) and the minimum by Aspergillus niger (3.91 mg/g). Molecular identification was carried out followed by PCR amplification of the fungal biomass showing highest absorption. The sequence obtained was submitted in the GenBank using BANkIt with accession number-MN714368 which showed high similarities with Colletotrichum gloeosporioides. This results indicated that fungus are promising and potential sources for metal biosorption and detoxification.


Author(s):  
Aleruchi Owhonka ◽  
Obire, Omokaro

Environmental pollution resulting from oil exploitation and exploration has impacted negatively on the biodiversity of the affected areas. Therefore, this study investigated the response of soil microorganisms to oilfield wastewater. The oilfield wastewater and soil samples were collected from an onshore oil producing platform fortnightly for a period of three months and microbiological analyses were performed using standard methods. Soil around pond average counts for THB and HUB (Log10 CFU/g) were 7.32 to 7.35 and 4.16 to 4.22 respectively. Soil 80 m away from pond average range for THB and HUB were 7.38 to 7.40 and 3.32 to 3.34 respectively. For TF and HUF, Soil around the pond mean recorded 4.65 to 4.85 and 4.12 to 4.16 (Log10 CFU/g) respectively. Mean monthly counts for soil 80m away TF and HUF (Log10 CFU/g) were 5.03 to 5.05 and 3.26 to 3.34 respectively. Soil around the pond recorded lower total heterotrophic bacteria count and total fungi count but higher hydrocarbon utilizing bacteria and hydrocarbon utilizing fungi than soil 80 m away. There was significant difference (P<0.05) between the THB and HUB in the various samples. For the fungi count there was no significant difference (P>0.05) between TF and HUF in all the samples except in sample obtained from soil 80 m away from pond. Bacteria species isolated from the study include: Bacillus, Aeromonas, Micrococcus, Staphylococcus, Chryseomonas, Proteus, Pseudomonas, Klebsiella. Apart from Aeromonas and Chryseomonas the rest of the isolate were identified also as hydrocarbon utilizing bacteria. While fungi species isolated includes: Aspergillus fumigates, Aspergillus niger, Aspergillus flavus, Saccharomyces cerevisiae, Geotricum, Trichoderma, Fusarium and Penicillium. Hydrocarbon utilizing fungi that occurred includes: Aspergillus niger, Aspergillus flavus, Fusarium, Penicillium and Saccharomyces cerevisiae. The response of these microorganisms in the oil polluted environment suggests that the isolated bacteria and fungi could utilize the oil as energy and carbon source and could be effective in the cleanup of the polluted sites.


Author(s):  
R.M. Potekhina ◽  
◽  
Yu.V. Larina ◽  
Z.Kh. Sagdeeva ◽  
N.N. Mishina ◽  
...  

A study of 12 soil samples in the summer period in the districts of the city of Cheboksary was conducted. The aim of the research was to conduct a mycological analysis of the soil and isolate particularly dangerous micromycetes in the urban environment. Soil samples were taken from the Moskovsky, Kalininsky, Leninsky districts of Cheboksary and Marposadsky highway. The pH of the soil environment of the city of Cheboksary was: Embankment of the Moskovsky district – 7.67, Kirovsky – 7.23; Leninsky – 7.28; Marposadskoe highway – 7.51. In mycological analysis of soil samples on agarized media of Chapek, the highest concentration of micromycetes was recorded in soil samples from the Moskovsky district on the Embankment, where the concentration of fungi of the genus Aspergillus fumigates was 27 %, fungi of the genus Fusarium sporotrichioides and Fusarium graminearum was 15 %. The soil of the Leninsky district was dominated by fungi of the genus Penicillium, their concentration was 23 %, Aspergillus flavus – 18 %. Isolates of fungi of the genus Penicillium spp. were isolated in the soil of the Kalininsky district, and their concentration was – 7 %, Aspergillus flavus – 21 %. The soil from the Marpasad highway was dominated by fungi of the genus Mucor sp. Testing on Paramecium caudatum infusoria showed that the field isolate of Aspergillus fumigates had toxic properties, the evaluation criterion for biotesting was 38 %. Aspergillus flavus showed a 78 % survival rate when tested on infusoria.


2019 ◽  
Vol 2 (2) ◽  
pp. 12-15
Author(s):  
Praveesh Bhati

The goal of present study was to find out optimum growth temperature of isolated floral waste degrading fungi viz. Aspergillus fumigatus, Aspergillus flavus, Alternaria alternate and Aspergillus terreus. Eleven different temperature range ( 20°C, 22°C, 24°C, 26°C, 28°C, 30°C, 32°C, 34°C,36°C,38°C,40°C) were selected to find the optimum growth of these fungi on floral extract-basal medium for flask experiments. The optimum growth temperature of all four fungal strains was found at 32°C±1°C. Beside Alternaria alternate, remaining other three selected fungal strains showed growth at all selected temperatures. At optimum growth temperature (32°C±1°C), the highest growth occurred in Aspergillus fumigates and Aspergillus terreus (155 mg/50 ml/7 days) while lowest growth was observed in Aspergillus flavus and Alternaria alternata (140 mg/50 ml/7 days). At minimum selected growth temperature (20°C), maximum growth was found in Aspergillus flavus (45 mg/50 ml/7 days) and lowest growth occurred in Alternaria alternata (35 mg/50 ml/7 days) while at maximum selected growth temperature (40°C) highest growth seen in Aspergillus fumigatus and Aspergillus flavus (30 mg/50 ml/7 days) and no growth recorded in Alternaria alternata (00 mg/50 ml/7 days).


1998 ◽  
Vol 36 (2) ◽  
pp. 107-112 ◽  
Author(s):  
T. MORI ◽  
M. MATSUMURA ◽  
K. YAMADA ◽  
S. IRIE ◽  
K. OSHIMI ◽  
...  
Keyword(s):  

2014 ◽  
Vol 16 (2) ◽  
pp. 131-136
Author(s):  
V.C. Alves ◽  
F.C. Cardoso Filho ◽  
M.M.G. Pereira ◽  
A.P.R. Costa ◽  
M.C.S. Muratori
Keyword(s):  

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