Table 1.

Nutritional properties of buckwheat, wild mustard and purple tansy. GLS: glucosinolate. Amounts of single phenolic and glucosinolate compounds are provided in electronic supplementary material, table S5.

	buckwheat	wild mustard	purple tansy
flower abundance
day 1	430 ± 40	1584 ± 117	1850 ± 299
day 2	433 ± 58	1524 ± 145	1791 ± 107
day 9	353 ± 33	809 ± 65	1042 ± 74
nectar
volume per flower (µl)	127 ± 7	106 ± 9	197 ± 17
sugar content (%)	47	51	53
pollen
volume per flower (µl)	20 ± 3	580 ± 59	540 ± 47
protein content (mg g−1)	161 ± 9	142 ± 7	301 ± 8
lipid content (mg g−1)	78 ± 5	95 ± 5	84 ± 7
protein : lipid ratio	2.1 ± 0.2	1.5 ± 0.1	3.6 ± 0.3
phenolic content (mg g−1)	6.6	2.5	5.3
GLS content (mg g−1)	0	0.87	0