hello, wrapping parafilm several times around the stem has worked for me for really thin stems, or even blades of bamboo leaves. If you don't have parafilm, maybe you can use regular scotch tape, or any rubbery/plastic stuff that can increase the diameter of the stem while also allowing some compression fitting to the hole.
Quoting Judy Che-Castaldo <[EMAIL PROTECTED]>: > Hello, > > I am a graduate student learning to use a pressure chamber to measure plant > water potential. My plant of interest is Thlaspi montanum montanum > (Brassicaceae), which has a very thin stem. The stem is so small that gas > is leaking out of the (already very tiny) hole in the rubber stopper that > fits around the stem. It is leaking at such a high rate that it has > drastically reduced the number of measurements I can take using my small > portable tank of gas. > > Has anyone else encountered this problem or has suggestions as to how to > prevent leaks in the stopper? > > Thanks, > Judy >
