Table 3.

Acetylene reduction by strains of R. leguminosarum on pea (P. sativum) and red and white clover (T. pretense and T. repens)

Plant	Time postinoculation (wk)	Strain	Relevant genotype or phenotypea	Amt of acetylene reduced (μmol/plant/h) (mean ± SEM) (n)b
Pea	3	Rlv3841	WT	2.65 ± 0.17 (6)
		RU4053	matA::pK19	2.82 ± 0.15 (6)
		RU4054	matC::pK19	2.87 ± 0.16 (6)
	4	Rlv3841	WT	6.9 ± 0.35 (6)
		LMB557	matB::ΩSpr	7.2 ± 0.50 (6)
Red cloverc	4	ATCC 14479	WT	0.118 ± 0.020 (30)
		LMB134	matA::ΩTcr	0.099 ± 0.009 (30)
		LMB136	matC::ΩTcr	0.117 ± 0.023 (30)
	5	ATCC 14479	WT	0.431 ± 0.01 (12)
		LMB510	matB::ΩSpr	0.470 ± 0.015 (24)
White cloverc	5	ATCC 14479	WT	0.407 ± 0.019 (24)
		LMB510	matB::ΩSpr	0.446 ± 0.044 (36)

^aAbbrevations used: WT, wild type; Sp^r, spectinomycin resistance; Tc^r, tetracycline resistance.

^bThe number of plants tested is shown in parentheses.

^cPlants shown in Fig. S2 in the supplemental material.