Table 4.

Microelement concentration of seventeen microgreen species.¹

Genotype	Fe	Zn	B	Mn	Cu
	mg 100 g-1 FW
‘Garnet red’ amaranth	0.432 ± 0.03 abc	0.297 ± 0.02 efg	0.137 ± 0.01 cdef	0.109 ± 0.002 ef	0.070 ± 0.003 ef
Scallion	0.473 ± 0.05 a	0.484 ± 0.04 b	0.371 ± 0.02 a	0.333 ± 0.025 a	0.104 ± 0.005 c
‘Black oil’ sunflower	0.446 ± 0.07 ab	0.749 ± 0.03 a	0.161 ± 0.01 bc	0.157 ± 0.005 cd	0.239 ± 0.009 a
Borage	0.411 ± 0.004 abcd	0.397 ± 0.01 cd	0.078 ± 0.01 h	0.095 ± 0.004 f	0.093 ± 0.001 d
Arugula	0.303 ± 0.01 de	0.294 ± 0.01 efgh	0.102 ± 0.01 efgh	0.062 ± 0.001 g	0.035 ± 0.003 l
Broccoli	0.336 ± 0.03 bcde	0.340 ± 0.02 ef	0.129 ± 0.01 cdefg	0.109 ± 0.01 ef	0.037 ± 0.001 il
Red cabbage	0.321 ± 0.02 cde	0.247 ± 0.004 ghi	0.113 ± 0.01 defgh	0.119 ± 0.005 ef	0.035 ± 0.003 l
Cressida Cress	0.318 ± 0.04 cde	0.404 ± 0.01 c	0.141 ± 0.01 cde	0.155 ± 0.008 cd	0.049 ± 0.001 gh
‘Red Russian’ kale	0.414 ± 0.03 abcd	0.308 ± 0.01 ef	0.102 ± 0.01 efgh	0.110 ± 0.01 ef	0.034 ± 0.002 l
Mizuna ‘America’	0.363 ± 0.01 abcde	0.315 ± 0.01 ef	0.102 ± 0.01 efgh	0.114 ± 0.005 ef	0.053 ± 0.003 gh
‘Garnet giant’ mustard	0.343 ± 0.05 bcde	0.213 ± 0.02 i	0.116 ± 0.01 defgh	0.105 ± 0.006 f	0.035 ± 0.004 l
‘Red arrow’ radish	0.346 ± 0.02 bcde	0.346 ± 0.01 de	0.089 ± 0.02 gh	0.120 ± 0.005 ef	0.052 ± 0.004 gh
‘Bull’s blood’ beet	0.398 ± 0.04 abcd	0.239 ± 0.01 ghi	0.101 ± 0.01 efgh	0.245 ± 0.002 b	0.060 ± 0.003 fg
‘Dark opal’ basil	0.254 ± 0.02 e	0.282 ± 0.01 fgh	0.120 ± 0.01 defg	0.053 ± 0.002 g	0.047 ± 0.002 hi
‘Genovese’ basil	0.333 ± 0.06 bcde	0.236 ± 0.02 hi	0.146 ± 0.01 cd	0.065 ± 0.007 g	0.065 ± 0.007 f
Britton shiso	0.452 ± 0.01 ab	0.320 ± 0.004 ef	0.098 ± 0.003 fgh	0.165 ± 0.005 c	0.119 ± 0.003 b
Lemon balm	0.311 ± 0.01 cde	0.246 ± 0.01 ghi	0.186 ± 0.02 b	0.136 ± 0.006 de	0.078 ± 0.002 e
P-value	0.004	0.0001	0.0001	0.0001	0.0001

¹ Data reported are means ± standard error of three replications. Means followed by different letters within each column are significantly different (P < 0.05) by Duncan’s multiple range test. Microgreens were grown under controlled environmental conditions in a polycarbonate greenhouse located in Fort Pierce, FL, USA. Each species was grown in separate growing channels using BioStrate-Felt growing mats and were fertigated with a standard nutrient solution containing only macronutrients.