Table 2.
Content of chlorophyll a (Ca), chlorophyll b (Cb), and carotenoid in red pine needles according to spectrophotometric determination

Samples	Needle Class	Chlorophyll a(µg/dwg1)	Chlorophyll b (µg/ dwg)	Carotenoid (µg/ dwg)	Ca/Cb ratio2
G10	Intact	1,568.1 ± 9.73	994.2 ± 2.4	4.0 ± 1.0	1.58
G20	Intact	1,351.7 ± 6.3	835.1 ± 6.9	44.5 ± 0.9	1.62
G30	Intact	1,396.3 ± 11.4	867.3 ± 7.9	2.9 ± 0.9	1.61
G31	Intact	914.8 ± 3.5	512.5 ± 2.3	150.2 ± 1.4	1.80
G32	Intact	1,233.1 ± 64.8	737.7 ± 38.5	192.9 ± 10.3	1.67
Y10	Senescent	161.5 ± 1.7	151.5 ± 2.3	45.2 ± 0.1	1.07
Y30	Senescent	78.2 ± 0.8	87.0 ± 1.3	49.8 ± 0.5	0.90
Y31	Senescent	561.4 ± 1.3	524.6 ± 2.8	10.7 ± 0.8	1.10
Y32	Senescent	1,118.7 ± 70.7	1,031.3 ± 63.1	20.4 ± 1.4	1.08
B10	Litter	55.2 ± 1.0	73.1 ± 1.6	10.7 ± 0.4	0.75
B20	Litter	55.8 ± 1.3	103.1 ± 1.6	11.9 ± 0.2	0.54
B30	Litter	71.2 ± 0.7	85.4 ± 0.5	25.2 ± 0.9	0.83
B31	Litter	51.8 ± 2.0	76.5 ± 2.7	19.0 ± 0.8	0.70
B32	Litter	90.9 ± 3.4	153.7 ± 2.3	22.1 ± 2.5	0.59

dwg: g of dry weight
Ca/Cb ratio: Chlorophyll a/Chlorophyll b ratio
Data indicate an average ± standard deviation. (n=3)