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Fig. 1 | BMC Plant Biology

Fig. 1

From: Transcriptional dynamics of gametogenesis in the green seaweed Ulva mutabilis identifies an RWP-RK transcription factor linked to reproduction

Fig. 1

Time course of gametogenesis in Ulva mutabilis. “determination phase” and “differentiation phase” described previously by Wichard and Oertel [16]. The “swarming phase” is the time when the change of medium can release the gametes. Asterisks indicate the sampled time points for RNA-seq. (a) vegetative cells before induction, (b) gametogenesis induction after 24 h with chloroplast reorientation, (c) gametangia after 48 h, (d) reproductive cells with fully formed gametes and gametes can be released upon removal of the SWI, (e) Ulva thallus before induction, (f) released gametes, (g, h) induced Ulva tissue without refreshment of growth medium after 48 h (g) and 72 h (h), demonstrating that no gametes were formed as long as sporulation inhibitors are not removed (control experiment). Scale bars: 2 cm (e) or 20 μm (others)

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