ration as it relates to the microbe chromatiales spp? what does it it need or could use from a cooperative metabolic partner (desuiforibrio vulgaris)?...

Help with this microbe

1. what is the metabolic cooperation as it relates to the microbe chromatiales spp?
2. what does it it need or could use from a cooperative metabolic partner (desuiforibrio vulgaris)? like electron acceptor, electron donor and environment.

Thank you