Assessing the Efficacy of Broad-Spectrum Antibiotics in Controlling Bacterial Contamination in the In Vitro Micropropagation of Ginger (Zingiber officinale Rosc)

Table 2

The effects of antibiotics on the in vitro bacterial contamination of microshoots of ginger (Z. officinale Rosc).

Treatment	mg/L	No. of clean plantlets		No. of killed explants
		Mean (SD)	%	Mean (SD)	%
Control	0	0.00 (0.00)^c	0	4.00 (0.00)^a	80
Streptomycin	50	0.00 (0.00)^c	0	1.00 (0.00)^c	20
	100	0.33 (0.57)^bc	7	2.00 (1.00)^b	40
	200	1.33 (1.52)^b	27	2.67 (1.15)^a	53
Kanamycin	50	0.00 (0.00)^c	0	0.33 (0.57)^c	7
	100	0.33 (0.57)^bc	7	1.00 (0.00)^bc	20
	200	0.67 (0.57)^bc	13	3.33 (1.52)^a	67
Gentamicin	50	0.00 (0.00)^c	0	1.67 (0.57)^bc	33
	100	1.00 (0.00)^bc	13	2.00 (1.00)^b	40
	200	1.33 (0.57)^b	27	3.00 (1.00)^a	60
Cefotaxime	50	4.33 (1.15)^a	87	0.00 (0.00)^c	0
	100	4.33 (0.57)^a	87	2.00 (1.00)^b	40
	200	4.67 (0.57)^a	93	2.33 (0.57)^b	47

Means in the same column with different letters are statistically significantly different at ; SD: standard deviation.