Table 1. Effects of dual-labeling methods on tobacco pelleted seed germination.

Variety	Treatment**	Germination energy (%)	Germination percentage (%)	Germination index
MSYY85	Ck	95.1±4.2a∗	98.9±1.1a	16.46±0.7a
	T1	97.4±0.0a	99.8±0.2a	17.48±0.2a
	T2	97.0±4.1a	98.3±2.9a	17.86±0.6a
	T3	98.4±2.7a	98.4±2.7a	17.31±0.5a
	T4	95.0±4.6a	98.6±2.4a	16.47±1.1a
HHDJY	Ck	96.2±3.3a	98.1±3.3a	16.80±0.7a
	T1	96.2±5.2a	98.4±2.2a	16.90±1.0a
	T2	97.1±4.9a	97.1±4.9a	16.94±1.2a
	T3	94.5±4.7a	98.6±1.3a	16.69±0.5a
	T4	95.5±4.6a	97.8±3.9a	16.63±0.7a

^*Significant difference (α = 0.05, LSD) among treatments within the same variety.

^** Ck: 2 g seeds pelleted with 15 g bentonite and 84 g talc as a control; T1: 2 g seeds pelleted with 15 g bentonite and 84 g powder mixture which consisted of 79.6 g talc, 0.2 g Fluorescein and 4.2 g magnetic powder (FR and MP dual-labels); T2: 2 g seeds pelleted with 15 g bentonite and 84 g powder mixture which consisted of 77.08 g talc, 0.2 g Fluorescein and 6.72 g magnetic powder (FR and MP dual-labels); T3: 2 g seeds pelleted with 15 g bentonite and 84 g powder mixture which consisted of 79.8 g talc and 4.2 g magnetic powder. Meanwhile, a 2.0 mg/ml of rhodamine B solution was sprayed in place of water when the seed was coated with bentonite (RB and MP dual-labels); T4: 2 g seeds pelleted with 15 g bentonite and 84 g powder mixture which consisted of 77.28 g talc and 6.72 g magnetic powder. Meanwhile, a 2.0 mg/ml of rhodamine B solution was sprayed in place of water when the seed was coated with bentonite (RB and MP dual-labels).