[Research advances in direct interspecies electron transfer within microbes]

Area of Science:

• Microbiology
• Biochemistry
• Environmental Science

Background:

• Traditionally, microbes utilized hydrogen and formic acid for electron transport.
• Direct Interspecies Electron Transfer (DIET) has emerged as a novel, more efficient microbial electron transfer mechanism.
• DIET challenges established concepts of microbial syntrophism and interaction.

Purpose of the Study:

• To review current knowledge on microbes involved in DIET.
• To elucidate the mechanisms of extracellular electron transfer in DIET (donor and acceptor roles).
• To examine the influence of conductive materials on DIET and propose future research directions.

Main Methods:

• Literature review and synthesis of existing research on DIET.
• Analysis of microbial consortia capable of DIET.
• Examination of mechanisms for extracellular electron transfer in DIET.
• Evaluation of conductive materials' impact on DIET.

Main Results:

• DIET demonstrates higher electron transfer efficiency compared to hydrogen/formate transfer.
• Identified various microbes capable of forming DIET co-cultures.
• Elucidated mechanisms of electron donation and acceptance in DIET.
• Highlighted the role of conductive materials in enhancing DIET.

Conclusions:

• DIET represents a significant advancement in understanding microbial interactions and syntrophism.
• Further research is needed on DIET mechanisms, microbial participants, and influencing factors.
• Optimizing DIET through conductive materials can improve microbial process efficiency and facilitate research.