Fig. 1

Sex identification of gametophyte samples with sex-specific markers (A) and gametophyte development ofSaccharina japonica(B). HFM4, female-specific marker. Msj68/16/3, male-specific marker. SIf, immature female gametophyte on day 0. SIm, immature male gametophyte on day 0. SMf, mature female gametophyte on day 12. SMm, mature male gametophyte on day 12. Bars are 25 μm in (B). The agarose gel pictures displayed here are cropped images of the same gel for clearity