Fig. 1From: The rooting ability of in vitro shoot cultures established from a UK collection of the common ash (Fraxinus excelsior L.) and their ex vitro survivalContaminated ash shoot-cultures. Proliferating ash shoot cultures contaminated with Bacillus megaterium or possibly B. aryabhattai, which can be seen as a sticky growth on or in the media around the bases of some of the shoots, indicated by arrowsBack to article page