Saline- and alkaline-tolerant growth-promoting bacteria in earthworm gut

Appendix 1 contains the formula and composition information of the culture medium used in this study, recording the main components, dosages, and units of LB medium, CAS medium, inorganic phosphorus medium, Mengjinna organic phosphorus medium, Ashby nitrogen free medium, and EPS medium. Appendix 2 presents the preliminary screening results of strains isolated from the earthworm gut, recording the strain numbers and their growth promoting characteristics, including iron carrier production ability, organic phosphorus solubility, inorganic phosphorus solubility, nitrogen fixation ability, indole-3-acetic acid (IAA) production ability, and extracellular polymeric substances (EPS) production ability.

The "√" in the table indicates that the corresponding function has been detected, while the "-" indicates that the corresponding function has not been detected or that the indicator is not applicable to the corresponding strain, indicating that the data is not missing. The data mainly comes from laboratory cultivation, plate screening, colorimetric determination, and morphological observation.

Possible errors mainly come from cultivation conditions, manual operation, and instrument measurement errors. The relevant experimental results have been controlled through repeated measurements and statistical analysis.