20 research outputs found

    Antifungal activity of essential oil Hyssopus officinalis L. against micopathogen Mycogone perniciosa (Mang)

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    The most commonly cultivated mushroom species is the Agaricus bisporus Lange (Imb). One of the major pathogenic diseases of the cultivated mushroom in Serbia is Mycogone perniciosa (Mang). Biological control systems are not much used in mushroom cultivation. Medical and aromatic plants have been placed in the focus of intense studies. Pure culture of the M. perniciosa was isolated from infected A. bisporus. The essential oil of Hyssopus officinalis L. is used as a potential antifungal agent. The most abundant components in oil are isopinocamphone (43.29%), pinocamphone (16.79%) and b-pinene (16.31%). Antifungal activity of Hyssop was investigated by the modified microatmosphere method. The minimal inhibitory quantity was 5 Ī¼L/mL and a minimal fungicidal quantity was 15-20 Ī¼L/mL. There is no report on the use of Hyssop essential oil in mushroom disease.Agaricus bisporus Lange (Imb) je najčeŔće komercijalno gajena jestiva gljiva Različiti mikroorganizmi gljive, bakterije i virusi su izazivači bolesti u gajiliÅ”tima Å”ampinjona. Mycogone perniciosa (Mang) je izazivač bolesti poznate pod nazivom vlažni mehur i najčeŔći uzročnik gubitaka u gajiliÅ”tima u Srbiji. BioloÅ”ka kontrola, koja je uspeÅ”no primenjivana na nekim poljoprivrednim kulturama, nije koriŔćena prilikom uzgoja gljiva. Jedna od mogućnosti je primena biljnih sprejova. Lekovite i aromatične vrste biljaka se intenzivno istražuju kao mogući antifungalni agensi. Uzorci obolelih Å”ampinjona su sakupljani u gajiliÅ”tima u Srbiji. Kulture M. perniciosa su izolovane sa obolelih plodonosnih tela A. bisporus. KoriŔćeno je etarsko ulje Hyssopus officinalis. Najzastupljenije komponente ulja su izopinokamfon (43.29%) trans-pinokamfon (16.79%) i b-pinen (16.31%). Antifungalna aktivnost etarskog ulja izopa ispitivana je modifikovanom "mikroatmosfera"- metodom. Minimalna inhibitorna količina je bila 5 Ī¼L/mL, a minimalna fungicidna količina 15-20 Ī¼L/mL. Velik broj preparata je napravljen i primenjen za kontrolisanje oboljenja pečuraka: fungicidi, primena mikrotalasa ili dejstvo nekih antagonističkih bakterija. Dosad nije bilo saopÅ”tenja o primeni etarskog ulja izopa protiv izazivača bolesti gajenih gljiva.nul

    Morpho-physiological characteristics and interactions of isolates of Mycogone perniciosa (Magnus) Delacr

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    Mycogone perniciosa (Magnus) Delacr., which causes wet bubble disease of Agaricus bisporus Lange (Imb), results in a considerable crop loss on mushroom farms in Serbia. The isolation and identification of five isolates of M. perniciosa from diseased fruit bodies of white button mushroom from mushroom units in Serbia, Bosnia and Herzegovina and Holland were made. Morpho-physiological characteristics and inter-relationships of the obtained isolates were studied. Macroscopic and microscopic investigations of different zones between colonies of the isolates of M. perniciosa revealed the phenomenon of the hyphal interference between different isolates. The obtained results suggest that hyphal interference could serve as an additional parameter for a more reliable determination of fungal specifity.Mycogone perniciosa (Magnus) Delacr., izazivač oboljenja mokre truleži najčeŔći je uzročnik gubitaka u gajiliÅ”tima Agaricus bisporus Lange (Imb) u Srbiji. IzvrÅ”ena je izolacija i identifikacija 5 izolata M. perniciosa sa obolelih plodonosnih tela Å”ampinjona iz gajiliÅ”ta u Srbiji, Bosni i Hercegovini i Holandiji. Ispitivane su morfo-fizioloÅ”ke karakteristike kao i stepen srodnosti proučavanih izolata na osnovu analize međusobnog delovanja kolonija, odnosno koriŔćenjem fenomena hifalne interferencije. Makroskopska i mikroskopska istraživanja odnosa izolata i dobijeni rezultati ukazuju da hifalna interferencija može predstavljati dodatni parametar u razlikovanju izolata M. perniciosa. Izolati dobijeni iz gajiliÅ”ta u Srbiji slični su međusobno, kao i izolati iz Holandije koji su pokazali međusobnu sličnost ali se razlikuju od prethodnih. Izolati iz Bosne i Hercegovine razlikovali su se i od srpskih i od holandskih.Projekat ministarstva br. 14304

    Effects of agaricus bisporus mushroom extract on honey bees infected with nosema ceranae

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    Agaricus bisporus water crude extract was tested on honey bees for the first time. The first part of the cage experiment was set for selecting one concentration of the A. bisporus extract. Concentration of 200 Āµg/g was further tested in the second part of the experiment where bee survival and food consumption were monitored together with Nosema infection level and expression of five genes (abaecin, hymenoptaecin, defensin, apidaecin, and vitellogenin) that were evaluated in bees sampled on days 7 and 15. Survival rate of Nosema-infected bees was significantly greater in groups fed with A. bisporus-enriched syrup compared to those fed with a pure sucrose syrup. Besides, the anti-Nosema effect of A. bisporus extract was greatest when applied from the third day which coincides with the time of infection with N. ceranae. Daily food consumption did not differ between the groups indicating good acceptability and palatability of the extract. A. bisporus extract showed a stimulative effect on four out of five monitored genes. Both anti-Nosema and nutrigenomic effects of A. bisporus extract were observed when supplementation started at the moment of N. ceranae infection or preventively (before or simultaneously with the infection)

    Pozitivan učinak dimetilsulfoksida na hepatoprotektivnu aktivnost volframata

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    Tungstates and polyoxotungstates have been known to be bioactive compounds for a long time. Based on our previous work about sodium tungstate (ST) and 12-tungstophosphoric acid (WPA) as hepatoprotective agents, we performed a seven week long experiment in rats, using ST and WPA pretreatments in thioacetamide (TAA) induced acute liver necrosis. The possible influences of dimethyl sulfoxide (DMSO), given orally for 3 consecutive days before inducing hepatic lesions, were also investigated. The effects were evaluated by the activity of serum enzymes, oxidative stress parameters, antioxidative defense markers, and histopathology in Wistar rats. The obtained results suggest that oral pretreatment with tungstates, especially ST, in combination with DMSO, before the TAA inducted liver necrosis, could be useful for the prevention of hepatic injury in rats.Volframati i polioksovolframati su decenijama poznati kao bioloÅ”ki aktivna jedinjenja. Kao nastavak prethodnog istraživanja hepatoprotektivnog efekta natrijum volframata (ST) i 12-volframfosforne kiseline (WPA), izveden je eksperiment na Wistar pacovima, koji su pretretirani sa ST i WPA tokom sedam nedelja a nakon tog perioda im je intraperitonealno ubrizgan tioacetamid (TAA) u cilju indukovanja akutne nekroze jetre. Ispitivan je uticaj dimetil sulfoksida (DMSO), koji je primenjivan per os u toku 3 konsekutativna dana pre indukcije hepatične nekroze. Efekti su evaluirani praćenjem aktivnosti serumskih enzima, parametara oksidativnog stresa, antioksidativnog odbrambenog markera, kao i histopatoloÅ”kom analizom tkiva jetre. Dobijeni rezultati ukazuju da oralni pretretman pacova sa volframatima, pre svega ST, u kombinaciji sa DMSO, može biti koristan u prevenciji nekroze jetre indukovane tioacetamidom

    Antifungal activity of essential oil Hyssopus officinalis L. against micopathogen Mycogone perniciosa (Mang)

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    The most commonly cultivated mushroom species is the Agaricus bisporus Lange (Imb). One of the major pathogenic diseases of the cultivated mushroom in Serbia is Mycogone perniciosa (Mang). Biological control systems are not much used in mushroom cultivation. Medical and aromatic plants have been placed in the focus of intense studies. Pure culture of the M. perniciosa was isolated from infected A. bisporus. The essential oil of Hyssopus officinalis L. is used as a potential antifungal agent. The most abundant components in oil are isopinocamphone (43.29%), pinocamphone (16.79%) and b-pinene (16.31%). Antifungal activity of Hyssop was investigated by the modified microatmosphere method. The minimal inhibitory quantity was 5 Ī¼L/mL and a minimal fungicidal quantity was 15-20 Ī¼L/mL. There is no report on the use of Hyssop essential oil in mushroom disease.Agaricus bisporus Lange (Imb) je najčeŔće komercijalno gajena jestiva gljiva Različiti mikroorganizmi gljive, bakterije i virusi su izazivači bolesti u gajiliÅ”tima Å”ampinjona. Mycogone perniciosa (Mang) je izazivač bolesti poznate pod nazivom vlažni mehur i najčeŔći uzročnik gubitaka u gajiliÅ”tima u Srbiji. BioloÅ”ka kontrola, koja je uspeÅ”no primenjivana na nekim poljoprivrednim kulturama, nije koriŔćena prilikom uzgoja gljiva. Jedna od mogućnosti je primena biljnih sprejova. Lekovite i aromatične vrste biljaka se intenzivno istražuju kao mogući antifungalni agensi. Uzorci obolelih Å”ampinjona su sakupljani u gajiliÅ”tima u Srbiji. Kulture M. perniciosa su izolovane sa obolelih plodonosnih tela A. bisporus. KoriŔćeno je etarsko ulje Hyssopus officinalis. Najzastupljenije komponente ulja su izopinokamfon (43.29%) trans-pinokamfon (16.79%) i b-pinen (16.31%). Antifungalna aktivnost etarskog ulja izopa ispitivana je modifikovanom "mikroatmosfera"- metodom. Minimalna inhibitorna količina je bila 5 Ī¼L/mL, a minimalna fungicidna količina 15-20 Ī¼L/mL. Velik broj preparata je napravljen i primenjen za kontrolisanje oboljenja pečuraka: fungicidi, primena mikrotalasa ili dejstvo nekih antagonističkih bakterija. Dosad nije bilo saopÅ”tenja o primeni etarskog ulja izopa protiv izazivača bolesti gajenih gljiva.nul

    Morpho-physiological characteristics and interactions of isolates of Mycogone perniciosa (Magnus) Delacr

    Get PDF
    Mycogone perniciosa (Magnus) Delacr., which causes wet bubble disease of Agaricus bisporus Lange (Imb), results in a considerable crop loss on mushroom farms in Serbia. The isolation and identification of five isolates of M. perniciosa from diseased fruit bodies of white button mushroom from mushroom units in Serbia, Bosnia and Herzegovina and Holland were made. Morpho-physiological characteristics and inter-relationships of the obtained isolates were studied. Macroscopic and microscopic investigations of different zones between colonies of the isolates of M. perniciosa revealed the phenomenon of the hyphal interference between different isolates. The obtained results suggest that hyphal interference could serve as an additional parameter for a more reliable determination of fungal specifity.Mycogone perniciosa (Magnus) Delacr., izazivač oboljenja mokre truleži najčeŔći je uzročnik gubitaka u gajiliÅ”tima Agaricus bisporus Lange (Imb) u Srbiji. IzvrÅ”ena je izolacija i identifikacija 5 izolata M. perniciosa sa obolelih plodonosnih tela Å”ampinjona iz gajiliÅ”ta u Srbiji, Bosni i Hercegovini i Holandiji. Ispitivane su morfo-fizioloÅ”ke karakteristike kao i stepen srodnosti proučavanih izolata na osnovu analize međusobnog delovanja kolonija, odnosno koriŔćenjem fenomena hifalne interferencije. Makroskopska i mikroskopska istraživanja odnosa izolata i dobijeni rezultati ukazuju da hifalna interferencija može predstavljati dodatni parametar u razlikovanju izolata M. perniciosa. Izolati dobijeni iz gajiliÅ”ta u Srbiji slični su međusobno, kao i izolati iz Holandije koji su pokazali međusobnu sličnost ali se razlikuju od prethodnih. Izolati iz Bosne i Hercegovine razlikovali su se i od srpskih i od holandskih.Projekat ministarstva br. 14304

    Jedan od faktora koji utiču na kvarenje steriliziranog mlijeka

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    Termički tretmani koji se upotrebljavaju za sterilizaciju mlijeka ne uniŔtavaju uvijek sve mikroorganizme, naročito ne izvjesne forme spora termorezistentnih bakterija iz familije Bacillaceae i to rodova Bacillus i Clostridium
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