TABLE 6.
Symbiotic reaction of several MLEE group B strains, identified as genospecies 2 or Sinorhizobium medicae (21), on Medicago polymorphaa
| Strainb | MLEE group | Host origin | Nodule typec | Nitrogenase activityd | Above-ground plant dry mattere |
|---|---|---|---|---|---|
| USDA 1002T (ST-1) | A | M. sativa | W | 0.08 | 20 |
| A321T (ST-11) | B | Medicago truncatula | P | 1.09 | 91 |
| CC169 (ST-11) | B | Medicago rugosa | P | 1.04 | 86 |
| M3 (ST-23) | B | Medicago orbicularis | P | 1.23 | 75 |
| M16 (ST-15) | B | M. orbicularis | W/P | 0.25 | 37 |
| M58 (ST-15) | B | Medicago rotata | W | 0.01 | 24 |
| M75 (ST-28) | B | Medicago radiata | W | 0.01 | 12 |
| M161 (ST-63) | B | Medicago noeana | W | 0.01 | 10 |
| M173 (ST-15) | B | Unspecified | W | 0.01 | 16 |
| M254 (ST-74) | B | M. rotata | P | 0.91 | 86 |
| Uninoculated | None | 0.00 | 13 |
a
Results are the means of three replicate jars containing two plants grown for 30 days.
b
USDA 1002 and A321 are the type strains for S. meliloti and S. medicae, respectively.
c
W, small and white; P, large and pink; W/P, mixture of the two types.
d
Acetylene reduction rate is in μmol C2H4/plant/h.
e
Dry weight is in mg/plant.