| Autor: |
Kasprowicz, Marek J., Gorczyca, Anna, Szymocha, Agnieszka |
| Předmět: |
|
| Zdroj: |
Biocontrol Science & Technology; Aug2015, Vol. 25 Issue 8, p873-887, 15p |
| Abstrakt: |
An assessment of the influence of water nanosilver suspension was made at a concentration of 10 mg·L−1on biological material (i.e., vegetative mycelium and conidia ofIsaria fumosoroseaentomopathogen) on a background of the silver nitrate ionic form used. Conidia ofI. fumosoroseatreated with silver nitrate for more than 168 h were completely deactivated. The application of nanosilver onIsariahyphae resulted in a quantitative limitation of mycelium growth and its weaker sporulation after culturing compared to the control. The pathogenicity of a conidial suspension obtained from such culturing towards test insects did not diverge from that observed in the standard culture. No obvious toxic effects of nanosilver were observed onI. fumosoroseaconidia.Isariaconidia, after exposure to nanosilver over a period between 1 and 800 h, initially demonstrated weaker vegetative mycelium formation in culture on solid medium and, as a consequence, this mycelium often sporulated in a poorer manner. In one case, there was a significant stimulation of the sporulation process for nanosilver treatment before culture for 168 h. Concurrently, conidial suspensions obtained from the culture after exposure of over 168 h to nanosilver exhibited enhanced pathogenicity towards test insects, which may be considered a beneficial phenomenon in terms of the function played byIsariain the whole environment. The reaction of conidia with nanosilver indicates the deactivation of conidia cells in suspensions and a possibility of selection in increased pathogenicity. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
