Morphological, ultrastructural, and chemical changes induced in Cunninghamella blakesleeana by copper and cobalt

Effect of heavy metals on cultural and morphological growth characteristics of halotolerant Penicillium morphotypes

“…The thickening of the cell wall and rounded cells in presence of copper sulphate and cadmium sulphate seen in WP1, MP2 and SP10 corroborates earlier findings with other fungi such as Cunninghaemella blakesleeana grown in the presence of copper [4] [17]; and in Aspergillus niger and Penicillium chrysogenum, sub-lethal concentrations of calcofluor-white caused formation of swollen apical tips [2].…”

Adsorption on montmorillonite prevents oligomerization of Bt Cry1Aa toxin

“…Our previous study concerning adsorption of Cry1Aa on different clays showed that pH has a significant effect on the amount of toxin retained on the clay. Venkateswerlu and Stotzky also reported a maximum of adsorption at pH values between 6 and 8, which are greater than the isoelectric point of the protein [40] The maximum amount adsorbed of Cry1Aa on montmorillonite decreased as the pH increased from 6.5 to 9 [28]. This observation along with the adsorption capacity of Na + -saturated montmorillonite is in favor of the availability of external and internal sites of the clay for the Cry1Aa adsorption.…”

Cell-wall-bound metal ions are not taken up inNeurospora crassa

“…In the above studies, nickel uptake was shown to be inhibited by Mg 2+ , suggesting the utilization of a transporter of this essential metal ion. Cell wall constituents have been implicated as the major metal-binding sites in fungi (Venkateswerlu et al 1989). They were also thought to be the barriers for protecting the organisms from metal toxicity by restricting their entry, but clear experimental evidence is not reported (Gadd 1993).…”