Table 5. Total, leaf, stem and root iron and zinc contents in plants of L. japonicus MG-20 and Gifu B-129 plants.

Ion	Ecotype	Treatment	Total (ppm)	Leaf (ppm)	Stem (ppm)	Root (ppm)
Fe	MG-20	Control	1848,9±174,72b	179,44±22,97a	181,33±19,56a	1516±170,3a
	MG-20	Alkalinity	2681,54±174,72a	174,5±22,97a	306,7±55,46b	2199±170,3b
	Gifu B-129	Control	2065,23±165,76b	233,71±22,97a	306,65±18,76a	1579±161,6a
	Gifu B-129	Alkalinity	2609,01±198,12a	184,5±23,99a	354,73±35,12a	2091±193,1b
Zn	MG-20	Control	104,63±5,67a	27,64±1,69a	43,05±3,32a	36,42±3,38a
	MG-20	Alkalinity	39,16±5,4b	10,45±1,69b	7,02±4,34b	24,88±3,09a
	Gifu B-129	Control	122,49±5,4a	35,78±1,69a	64,91±3,46a	23,25±3,09a
	Gifu B-129	Alkalinity	33,27±5,4b	9,18±1,95b	14,28±4,34b	16,68±3,23b

Seven-day-old plants were watered with 0.5×Hoagland’s nutrient solution, with or without addition of 10 mM NaHCO₃ over 21 days. Average data (±SE; n = 12) with the same letter within each ecotype are not significant different (Duncan, P<0.001).