. 2021 Mar 14;28(28):37616–37626. doi: 10.1007/s11356-021-13242-9

Table 1.

Stomata number and area in control and metal-treated cultivars of C. cardunculus

Cv	Treatment	Stomata number^§ (N.)	Stomata area (μm²)	Total stomata surface^§ (μm²)
		Mean±SD	Mean±SD	Mean±SD
Sardo	^*C	213±19^ab	383±50^c	79921±13794^ab
	Cd	152±28^cd	531±84^ab	51177±14022^b
	Pb	145±67^cd	340±73^c	80541±37958^ab
Siciliano	C	170±33^bc	466±125^ab	80213±29975^ab
	Cd	107±18^d	506±127^ab	62809±18004^ab
	Pb	100±7^d	583±96^a	47056±6268^b
Spagnolo	C	117±7^d	463±86^abc	54372±12585^b
	Cd	231±42^a	447±46^bc	92265±25328^a
	Pb	168±51^bc	385±60^c	71502±26932^ab

^*C control, SD standard deviation. Different letters indicate significant differences (p < 0.05) among the treatments according to Tukey’s post hoc test. ^§All parameters were estimated on a surface of 0.8 mm²