Table 1. Colonisation of Lotus japonicus nodules by endophytic bacteria.
| Inoculum | Endophyte colonisation ratio colonised/total nodules (%) a | Symbiont colonisation ratio colonised/total nodules (%) | Frequency of plants with at least one nodule infected by the endophyte |
|---|---|---|---|
| H. frisingense GSF30 + M. loti wild type | 0/32 | n.d. | 0/10 |
| Herbaspirillum B501 + M. loti wild type | 1/32 b | n.d. | 1/10 (10%) |
| R. giardinii 129E + M. loti wild type | 3/1045 (0,29%) | n.d. | 3/203 (1,5%) |
| Burkholderia KAW25 + M. loti wild type | 8/245 (3,3%) | n.d. | 7/88 (7,9%) |
| R. mesosinicum KAW12 + M. loti wild type | 20/243 (8,2%) | n.d. | 17/57 (29,8%) |
| R. mesosinicum KAW12 + A. caulinodans | 4/231 (1,7%)*** | 8/231 (3,4%) | 3/26 (11%) |
| A. caulinodans (n = 9) | 2/153 (1,3%) | ||
| R. mesosinicum KAW12 + M. loti nodZ | 22/917 (2,4%)*** | 677/917 (74%) | 19/153 (12%) |
| M. loti nodZ (n = 26) | 203/252 (81%) | ||
| R. mesosinicum KAW12 + M. loti exoU | 1169/3588 (33%)*** | 510/3588 (14%) | 195/199 (98%) |
| M. loti exoU (n = 171) | 83/3653 (2,3%) | ||
| R. mesosinicum KAW12 eps1 + M. loti wild type | 3/740 (0,4%)*** | 645/740 (87%) | 3/100 (3%) |
| R. mesosinicum KAW12 eps1 + M. loti exoU | 0/2592 *** | 75/2592 (2,9%) | 0/139 |
n.d. not determined
a- statistical significance of R. mesosinicum inoculations compared to R. mesosinicum KAW12+M. loti wild type (***-P<0,005)
b- bacteria were found present inside this nodule in cortical infection threads