# Highlighting/Bolding Tcircle elements

So I am using PSTricks PSTree package to build a tree using TCircle ... now I want to bold out some branches by making the lines of the circle and the connecting lines thicker ... can I do this somehow?

\documentclass{article}
\pagestyle{empty}
\usepackage{pst-tree}
\def\thickline#1#2{\ncline[linewidth=3pt]{#1}{#2}}
\newpsstyle{thick}{edge=\thickline,linewidth=3pt}
\begin{document}
\pstree{\Toval{root}}{%
\Tcircle[linewidth=3pt]{A}
\Tcircle{B}}