TABLE 3.

Effect of K. ascorbata SUD165 on the toxicity of nickel to canola and tomato seedlings grown in gnotobiotic growth pouches or in soil in pots

Expta	Organ	Ni2+ concn (mM)	TIb
			Ni2+ only	Ni2+ + cellsc	Ni2+ + cellsd
1	Shoots	1	0.48	0.75	NDe
	Roots	1	0.57	0.85	ND
2	Shoots	2	0.22	0.49	0.71
	Roots	2	0.11	0.34	0.54
3	Shoots	2	0.22	0.47	ND
	Roots	2	0.08	0.32	ND
4	Shoots	1	0.44	0.71	0.81
	Roots	1	0.49	0.73	0.87
5	Shoots	6	0.12	ND	0.18
	Roots	6	0.23	ND	0.33
6	Shoots	6	0.18	ND	0.41
	Roots	6	0.23	ND	0.36
7	Shoots	3	0.54	ND	0.70
	Roots	3	0.57	ND	0.80
8	Shoots	4	0.42	ND	0.59
	Roots	4	0.35	ND	0.56

^aExperiments were performed with canola (experiments 1 to 6) and tomato (experiments 7 and 8) seedlings grown in gnotobiotic growth pouches (experiments 1 to 4) or in soil in pots (experiments 5 to 8). 

^bThe values for the different treatments differ significantly from the untreated control and from each other (P < 0.001). Each value (including the seeds grown in the absence of nickel, i.e., TI = 1.0) reflects the mean of the response of 50 to 60 seeds. 

^cK. ascorbata SUD165 cells diluted to an absorbance at 600 nm of 0.025. 

^dK. ascorbata SUD165 cells diluted to an absorbance at 600 nm of 0.50. 

^eND, not determined.