# Fungi and Arsenic: Tolerance and Bioaccumulation by Soil Saprotrophic Species
## 3 Results
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**MEA**} & \multicolumn{6}{c}{**T.I. (\%)**} \\ \hline \multicolumn{2}{c}{**Tolerance Index**} & \multicolumn{6}{c}{**Rc:Rt (\%)**} & \multicolumn{6}{c}{**T.I. (\%)**} \\ \hline \multicolumn{2}{c}{**NaAsO\({}_{2}\) Concentration**} & **10 mg/L** & **20 mg/L** & **50 mg/L** & **10 mg/L** & **20 mg/L** & **50 mg/L** \\ \hline \multirow{4}{*}{**Species**} & _A. spinosa_ FBL 69 & 88.7 & 66.7 & 50.3 & 88.9 & 62.5 & 52.8 \\ \cline{2-8}  & _P. Iilacinum_ FBL 478 & 97.8 & 98.1 & 96.8 & 93.4 & 99.4 & 96.5 \\ \cline{2-8}  & _M. marquandii_ FBL 484 & 93.1 & 104.2 & 96.3 & 95.8 & 113.5 & 100.7 \\ \cline{2-8}  & _C. nanum_ FBL 73 & 106.4 & 105.1 & 116.7 & 110.6 & 101.2 & 111.4 \\ \hline \multicolumn{2}{c}{**CDA**} & \multicolumn{6}{c}{**Tolerance Index**} & \multicolumn{6}{c}{**Rc:Rt (\%)**} & \multicolumn{6}{c}{**T.I. (\%)**} \\ \hline \multicolumn{2}{c}{**NaAsO\({}_{2}\) Concentration**} & **10 mg/L** & **20 mg/L** & **50 mg/L** & **10 mg/L** & **20 mg/L** & **50 mg/L** \\ \hline \multirow{4}{*}{**Species**} & _A. spinosa_ FBL 69 & 98.3 & 100 & 99.4 & 93.6 & 94.6 & 109.6 \\ \cline{2-8}  & _P. Iilacinum_ FBL 478 & 98.2 & 96.7 & 91.2 & 105.5 & 101.9 & 97.2 \\ \cline{2-8}  & _M. marquandii_ FBL 484 & 102.1 & 107.6 & 100 & 102.4 & 104.2 & 102.0 \\ \cline{2-8}  & _C. nanum_ FBL 73 & 102.6 & 99.3 & 96.7 & 101.9 & 105.4 & 96.3 \\ \hline \end{tabular}  
* Rt:Rc is defined as the ratio of the colony extension rates in the presence (Rt) or absence (Rc) of arsenic. T.I. is defined as the ratio of the dry weight of the fungal biomass in the presence or absence of arsenic.  
\end{table} 
Table 3: Tolerance indexes of the tested species exposed to arsenic (Rt:Rc and T.I.) on Malt Extract Agar (MEA) and Czapeck Dox Agar (CDA) a. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{8}{c}{**Medium pH**} \\ \hline \multicolumn{2}{c}{**Medium**} & \multicolumn{4}{c}{**MEA**} & \multicolumn{4}{c}{**CDA**} \\ \hline \multicolumn{2}{c}{**NAAsO\({}_{2}\)**} & \multirow{2}{*}{**Control**} & \multirow{2}{*}{**10 mg/L**} & \multirow{2}{*}{**20 mg/L**} & \multirow{2}{*}{**50 mg/L**} & \multirow{2}{*}{**Control**} & \multirow{2}{*}{**10 mg/L**} & \multirow{2}{*}{**20 mg/L**} & \multirow{2}{*}{**50 mg/L**} \\ \multicolumn{2}{c}{**Concentration**} & & & & & & & & \\ \hline \multicolumn{2}{c}{**Blank**} & \(5.4\pm 0.1\) & \(5.3\pm 0.0\) & \(5.3\pm 0.1\) & \(5.6\pm 0.1\) & \(5.7\pm 0.0\) & \(5.7\pm 0.0\) & \(5.6\pm 0.1\) & \(5.8\pm 0.1\) \\ \hline \multicolumn{2}{c}{**Species**} & \multicolumn{2}{c}{_A. Syntax_**FEL 69**} & \(3.5\pm 0.1\)*** & \(3.6\pm 0.1\) & \(3.5\pm 0.1\) & \(3.6\pm 0.1\)*** & \(4.4\pm 0.0\)*** & \(4.5\pm 0.1\) & \(4.6\pm 0.1\)*** & \(4.4\pm 0.0\)*** \\ \cline{2-9} \multicolumn{2}{c}{**\(P\). _Illacium_**FEL 478**} & \(4.9\pm 0.2\) & \(4.6\pm 0.1\) & \(4.8\pm 0.1\) & \(5.2\pm 0.1\) & \(6.3\pm 0.0\)*** & \(6.2\pm 0.0\) & \(6.0\pm 0.1\) & \(6.2\pm 0.0\) \\ \cline{2-9} \multicolumn{2}{c}{**\(M\). _marquandil_**FEL 484**} & \(5.3\pm 0.0\) & \(5.4\pm 0.0\) & \(5.3\pm 0.1\) & \(5.4\pm 0.1\) & \(6.4\pm 0.1\) & \(6.2\pm 0.1\) & \(6.3\pm 0.1\) & \(6.1\pm 0.0\) \\ \cline{2-9} \multicolumn{2}{c}{**\(C\). _natum_**FEL 73**} & \(5.3\pm 0.1\) & \(5.3\pm 0.1\) & \(5.5\pm 0.1\) & \(5.5\pm 0.1\) & \(6.7\pm 0.0\)*** & \(6.3\pm 0.1\) & \(6.5\pm 0.0\)*** & \(6.3\pm 0.0\) \\ \hline \multicolumn{9}{l}{* Asterisks denote a significant difference (_post-hoc_**Tambarne’s 12-test) between the blank and the species for the respective treatments (\({}^{\dagger