Effect of temperature and water potential on the germination of seeds from three different populations of Bidens pilosa as a potential Cd hyperaccumulator

Table 2 The effect of temperature and water potential on seed germination percentage and rate of B. pilosa from three populations

Population	Temperature (℃)	Germination percentage (%)				Germination rate (1/t₅₀)
Population	Temperature (℃)	0 MPa	-0.3 MPa	-0.6 MPa	-0.9 MPa	0 MPa	-0.3 MPa	-0.6 MPa	-0.9 MPa
Baoshan	8	80.00c	74.67b	26.00c	0.00a	0.05d	0.05e	0.00c	-
	12	94.00ab	96.00a	82.67a	4.00a	0.15c	0.13c	0.07b	-
	15	98.67a	96.00a	92.00a	2.67a	0.19c	0.14c	0.09a	-
	20	98.00ab	93.33a	88.67a	3.33a	0.32b	0.18a	0.09a	-
	25	97.33ab	95.33a	86.00a	8.00a	0.43a	0.16b	0.07b	-
	30	92.00ab	86.00ab	38.00b	0.00a	0.37b	0.08d	0.00c	-
	35	89.33c	41.33c	4.67d	0.00a	0.13c	0.00f	0.00c	-
Guilin	8	76.67b	68.67b	20.67c	0.00b	0.05e	0.04e	0.00d	-
	12	96.67a	94.00a	69.33b	3.33b	0.10d	0.12d	0.07b	-
	15	98.67a	98.00a	85.33ab	3.33b	0.15d	0.15 cd	0.07b	-
	20	96.00a	94.00a	94.67a	6.00b	0.41b	0.21b	0.11a	-
	25	98.67a	99.33a	84.67ab	16.00a	0.50a	0.27a	0.08b	-
	30	97.33a	94.00a	65.33b	4.67b	0.32c	0.17bc	0.04c	-
	35	82.67b	69.33b	23.33c	0.00b	0.10d	0.05e	0.00d	-
Danzhou	8	48.00d	30.00d	7.33d	0.00c	0.00e	0.00d	0.00c	-
	12	95.33ab	96.00ab	93.33a	9.33b	0.13d	0.09c	0.07b	-
	15	94.00ab	96.00ab	82.00ab	8.67b	0.16d	0.10bc	0.06b	-
	20	97.33a	100.00a	92.67a	12.67ab	0.37b	0.29a	0.10a	-
	25	97.33a	95.33ab	88.00a	16.00a	0.53a	0.29a	0.10a	-
	30	86.67c	86.67b	74.00b	8.00b	0.31c	0.14b	0.10a	-
	35	88.67bc	59.33c	31.33c	0.67c	0.15d	0.04d	0.00c	-

Different lowercase letters indicate significant differences among different temperatures at the same water potential within each population (DUNCAN, P < 0.05). “-” means no data have been calculated

ISSN: 1471-2229