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Morphological characterization of biocontrol isolates of Trichoderma to study the correlation between morphological characters and biocontrol efficacy

100%
Kumar M., Sharma P.
International Letters of Natural Sciences
|
2016
|
tom 55
The morphological characterization was carried out for 5 isolates of Trichoderma harzianum and 7 isolates of Trichoderma viride and tested for their biocontrol efficacy. The isolates belonging to T.harzianum were analogous in colony colour, culture smell, mycelial colour, conidiation, conidial shape, conidial wall and conidial colour. Correspondingly the isolates of T.viride showed certain similarity in colony colour, colony edge, culture smell, conidiophore branching, conidial wall, conidial colour and chlamydospores. Inter specific differences through cluster analysis based on morphological characters grouped the twelve isolates into three major clusters where all the isolates of T.harzianum formed a single cluster while the isolates of T.viride were bifurcated into two groups. The clustering was substantiated by similarity index which showed maximum similarity among T.harzianum isolates with only less than 20% variation among themselves. Similarly the clusters having isolates of T.viride also had less variation within them. The biocontrol efficacy of these twelve isolates of Trichoderma was experimented by dual culture test under laboratory condition and there existed some relation between the biocontrol efficacy of these isolates and morphology.
2

In vitro-evaluation of lipid emulsions as vehicles for the administration of xenon: Interaction with NMDA receptors

84%
Weigt H. U., Georgieff M., Fohr K. J., Adolph O.
Acta Neurobiologiae Experimentalis
|
2009
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tom 69
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nr 2
207-216
The noble gas xenon is an antagonist of the NMDA (N-methyl-D-aspartate)-type glutamate receptor which may account for the ideal anesthetic profile and potent neuroprotective properties demonstrated even at subanesthetic concentrations. Because lipid emulsions also promote NMDA antagonistic effects they may serve as ideal carriers for xenon. In this in vitro study, we investigated the efficacy of xenon dissolved in various lipid emulsions (Intralipid®, Lipofundin®, ClinOleic® and Abbolipid®) on NMDA-evoked currents in cultured cortical neurons. The NMDA receptor blocking property at a clinically relevant concentration seen in the lipid emulsions tested may contribute to the anesthetic, analgetic and neuroprotective effects of xenon administered by way of these lipid carriers. Abbolipid® may serve as the most acceptable carrier since the NMDA antagonistic effect of xenon was enhanced in combination with this emulsion.
3

The effect of interaction between heavy metal ions on the desulfurication process

84%
Szymanska K., Domka F., Mikutaniec A.
Polish Journal of Environmental Studies
|
1998
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tom 07
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nr 3
This paper reports results of studies on the effects of interaction between heavy metal ions (Hg2+, Cd2+, Ni2+ and Cu2+) on the degree of desulfurication taking place using Desulfotomaculum ruminis bacteria. It has been found that mutual interaction of heavy metal ions can bring either antagonistic or synergetic effects. For instance, the toxic effect of Hg2ł ions on the process of desulfurication is minimized after the introduction of Cd2+ ions (antagonism). In other cases interaction of the metal ions studied has led to synergetic inhibition. The concentration ranges of metal ions in which they show the inhibiting effect or act as antagonists have been determined.
4

Antagonistic effect of chosen lactic acid bacteria strains on Yersinia enterocolitica species in model set-ups, meat and fermented sausages

67%
Gomolka-Pawlicka M., Uradzinski J.
Polish Journal of Veterinary Sciences
|
2003
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tom 06
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nr 2
5

Antagonistic effects of Bacillus cereus strain B-02 on morphology, ultrastructure and cytophysiology of Botrytis cinerea

67%
Li F.-X., Ma H.-Q., Liu J., Zhang C.
Polish Journal of Microbiology
|
2012
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tom 61
|
nr 2
The study on antagonistic mechanism of biocontrol strains gives the premise and basis for efficient and stable biological control. This study aimes to overcome of biocontrol agent in aspects of complicated and diversified mode of action, short-lasting and unstable efficacy in the production processes. This study elucidated the antagonistic mechanism of Bacillus cereus strain B-02 on Botrytis cinerea by detecting changes in morphology, ultrastructure and physiology in affected hyphae of Botrytis cinerea. Which provided certain theoretical and practical significance for biological control of gray mould caused by B. cinerea. B. cereus strain B-02 isolated from tomato rhizosphere mightily suppressed gray mold in tomato caused by B. cinerea. Spore germination and hyphal growth of B. cinerea were inhibited by B. cereus strain B-02. Changes of cell morphology such as distortion, shrinking and swelling were observed by SEM. TEM observation further indicated the ultrastructural alterations of hyphae, including mitochondrion reduction, un-membranous inclusion in cytoplasm, considerable thickening of cell walls, and electronic density enhancement. LSCM observation revealed the fluorescence intensity of nucleus DNA, mitochondrion DNA and reactive oxygen radical in treated hyphae were all stronger than control and the difference was significant (P < 0.01). These results indicated that the antagonistic effects of B. cereus strain B-02 on B. cinerea were likely due to a combination of abnormal synthesis of nucleus DNA and mitochondrion DNA and multifarious ultrastructural alterations in hyphal cell.
6

Antagonistic effect of fungi communities from scots pine fine roots on Heterobasidion annosum [Fr.] Bref. and Armillaria astoyae [Romagn.] Herink growth

67%
Kwasna H.
Phytopathologia Polonica
|
1997
|
tom 13
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