Ulvan, a Sulfated Polysaccharide from Green Algae, Activates Plant Immunity through the Jasmonic Acid Signaling Pathway

Table 1

Chemical composition of an Ulva spp. crude extract and fractions obtained by ethanol precipitation and size-exclusion chromatography ( mg⋅g^-1 of dry matter).

Fraction	Uronic acid	Neutral sugars				Uronic acid	Sulphur
		Rhamnose	Xylose	Galactose	Glucose	Rhamnose
crude	59	78	8	6	nd	0.76	33.8
EtOH soluble	0	2.5	0.1	1.6	0	0.00	13.8
EtOH Insoluble	143	184	16	12	4	0.78	56.6
600–400 kDa	245	345	24	11	nd	0.71	64.6
60–40 kDa	215	325	25	18	nd	0.66	55.9

nd. not determined