Table 1.

Nuclear DNA content with corresponding C-value in kelp species including Laminarialean species and one Fucalean species (*). Cell type correspond to gametophyte (Gp), female gametophyte (Gpf), male gametophyte (Gpm), sporophyte (Sp), cortical cell (Cc), sporangia (Sg), paraphysis (Pa), meristoderm (Me). Values are expressed in picograms (pg). If originally expressed in megabasepairs (Mb), we used the currently accepted conversion factor 1 pg = 980 Mb (Cavalier-Smith 1985)

Kelp species	Cell type	DNA amount			Reference
		1C (pg)	2C (pg)	4C (pg)
Agarum clathratum	Sp	0.60	1.20	2.50	Kapraun (2005)
Alaria esculenta	Sp	0.70	1.20	2.30	Kapraun (2005)
Durvillaea incurvata*	Gpm	0.6	1.2	-	Salvador Soler et al. (2019)
D. incurvata* (as D. antarctica)	Sp-Pa, Cc	-	1.2	-	Salvador Soler et al. (2019)
Ecklonia radiata	Sp	0.60	1.30	2.60	Kapraun (2005)
Egreria menziesii	Sp	0.78	1.55	3.10	Phillips et al. 2011
Laminaria digitata	Gp/Sp	(0.64)-0.70	1.40	2.70–2.80	Le Gall et al. (1993), Marie and Brown (1993), Kapraun (2005)
Laminaria hyperborea	Sp	0.33	0.65	1.30	Phillips et al. (2011)
Lessonia spicata	Sp-Sg	0.8	-	-	Salvador Soler et al. (2019)
L. spicata	Sp-Me	0.9	1.5	-	Salvador Soler et al. (2019)
Macrocystis pyrifera	Gpm	1.05	2.10	4.20	Phillips et al. (2011)
M. pyrifera	Sp-Sg	0.7	-	-	Salvador Soler et al. (2019)
M. pyrifera	Sp-Cc	-	1.4	+	Salvador Soler et al. (2019)
M. pyrifera (as M. angustifolia)	Gpf	1.10	2.20	4.40	Phillips et al. (2011)
M. pyrifera (as M. integrifolia)	Sp	0.79	1.57	3.14	Phillips et al. (2011)
Nereocystis luetkeana	Sp	0.65	1.30	2.60	Phillips et al. (2011)
Saccharina japonica	Sp	0.59	-	-	Liu et al. (2019) (genomic analysis)
S. latissima	Gp/Sp	0.60 (0.72)–0.79	1.30 1.58	2.60 3.16	Kapraun (2005) Le Gall et al. (1993), Marie and Brown (1993)
Undaria pinnatifida	Gp/Sp	(0.58)–0.64 0.60	1.28 1.30	2.56 2.6	Le Gall et al. (1993), Marie and Brown (1993), and Kapraun (2005)
U. pinnatifida	Gpm	(0.52)	-	-	Shan et al. 2020 (genomic analysis)