Table 4. Contents of chlorophyll a, b and total in apical leaves of L. japonicus Gifu B-129 and MG-20 plants.

		Chlorophyll a	Chlorophyll b	Total chlorophyll
Gifu B-129	control	0,9±0,1b	0,34±0,03a	1,24±0,14b
	alkaline	0,4±0,1c	0,18±0,03b	0,59±0,14c
MG-20	control	1,25±0,1a	0,25±0,43a	1,68±0,14a
	alkaline	0,82±0,1b	0,41±0,33a	1,15±0,14b

Seven-day-old plants were watered with 0.50 Hoagland’s nutrient solution, with or without the addition of 10 mM NaHCO₃ during a period of 21 days. Results are the mean of 12 biological replicates ±SE. Statistical differences between control and treatments within each ecotype are shown as P<0.001 (Duncan’s post-hoc test).