How to display the KDE system tray icons on LXDE panel?

With KDE, I sometime need to close/kill KDE (plasmashell) to have more available system resources, while doing so I run lxpanel on its own to have a minimal panel while KDE Plasma is closed. This does work flawlessly but the system tray. On the LXDE panel (lxpanel) I have added the system tray applet and did get the tray to work only when I launch application with the following commands:

# is currently KDE even if plasmashell is closed
export XDG_CURRENT_DESKTOP=LXDE
dbus-launch app_using_tray

Is there a way to have the currently running tray applications displayed on lxpanel? or is there any alternative that would permit to access to those application while plasmashell is closed? How to display the KDE system tray icons when plasmashell is replaced temporarily with LXDE panel?