Table 3. Effects of Cd on the photosynthetic pigments in the leaves of two Italian ryegrass cultivars.

Cultivar	Cd supply μM	Chl a mg·g−1 FW	Chl b mg·g−1 FW	Car mg·g−1 FW	Chl (a + b) mg·g−1 FW	Chl a/b mg·g−1 FW
IdyII	0	1.10 ± 0.07 abc	0.34 ± 0.01 ab	0.18 ± 0.01 abc	1.44 ± 0.05 ab	3.25 ± 0.02 ab
	5	1.03 ± 0.09 bcd	0.32 ± 0.02 abc	0.16 ± 0.02 abcd	1.36 ± 0.07 bc	3.21 ± 0.05 abc
	10	0.97 ± 0.22 cd	0.31 ± 0.04 bc	0.16 ± 0.02 bcde	1.28 ± 0.16 bc	3.08 ± 0.08 abcd
	25	0.97 ± 0.05 cd	0.32 ± 0.02 abc	0.14 ± 0.03 cde	1.33 ± 0.04 bc	3.05 ± 0.22 abcd
	50	0.86 ± 0.01 d	0.27 ± 0.01 c	0.13 ± 0.01 cde	1.13 ± 0.02 c	3.13 ± 0.12 abc
	100	0.58 ± 0.03 ef	0.20 ± 0.01 d	0.10 ± 0.01 ef	0.79 ± 0.01 de	2.86 ± 0.20 bcd
Harukaze	0	1.20 ± 0.12 ab	0.38 ± 0.02 a	0.19 ± 0.01 ab	1.60 ± 0.10 a	3.17 ± 0.08 abc
	5	1.22 ± 0.06 a	0.38 ± 0.01 a	0.20 ± 001 a	1.60 ± 0.05 a	3.18 ± 0.04 abc
	10	0.95 ± 0.12 cd	0.29 ± 0.02 bc	0.14 ± 0.01 cde	1.24 ± 0.09 bc	3.34 ± 0.04 a
	25	0.69 ± 0.06 e	0.21 ± 0.01 d	0.12 ± 0.01 def	0.89 ± 0.04 d	3.30 ± 0.03 a
	50	0.48 ± 0.11 f	0.17 ± 0.02 d	0.08 ± 0.01 f	0.65 ± 0.08 e	2.83 ± 0.03 cd
	100	0.21 ± 0.08 g	0.07 ± 0.02 e	0.03 ± 0.01 g	0.29 ± 0.06 f	2.71 ± 0.21 d
ANOVA (F Values)	Cd	51.73***	42.84***	20.56***	51.17***	4.43**
	Cultivar	15.04*	19.39***	4.92*	16.73***	0.01ns
	Cd × cultivar	9.584***	10.24***	5.39**	10.18***	1.86ns

Notes:

Chl a, Chl b, and Car, indicate Chl a, Chl b, and carotenoids, respectively. Values (mean ± SE; n = 3) with different letters in the same columns are significantly different according to the Duncan’s multiple range test.

*P < 0.05, **P < 0.01, ***P < 0.001; ns, not significant.