environement variable - manage jvm

In currently configured domain there is no node manager. There is one admin admin and manage jvm. They are started via startup script.

To enter system property I could use following: for example JAVA_OPTIONS="$JAVA_OPTIONS -Dmyvalue" for the system property.

However if I would like just provide environment variable could I enter for example below JAVA_OPTIONS something like:

export CUSTOM_VAR="test".

Please confirm above setting environment variable available to weblogic manage jvm is supported.

Thanks

Andrew