To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2. Development (time-lapse) of a 8-cell embryo from which the stalk has been microdissected. Left-over pieces (remnants) of the stalk cell wall are visible. MUM, a maternal unknown message, inhibits early establishment of the medio-lateral axis in the embryo of the kelp Saccharina latissima Samuel Boscq, Bernard Billoud, Ioannis Theodorou, Tanweer Joemmanbaks, Tanguy Dufourt, and Bénédicte Charrier Development 2024. 151:None-None; doi: 10.1242/dev.202732 Download Original Video