Synthetic microbe-to-plant communication channels

Area of Science:

• Synthetic Biology
• Plant-Microbe Interactions
• Microbial Engineering

Background:

• Plants and microbes engage in complex chemical communication for survival and adaptation.
• Existing communication relies on intricate natural regulatory networks, limiting targeted information transfer.
• There is a need for engineered systems to facilitate controlled interkingdom signaling.

Purpose of the Study:

• To develop modular communication channels enabling bacteria to transmit environmental stimuli to plants.
• To engineer a synthetic system for programmable interkingdom signaling.
• To demonstrate the versatility of this communication system across different bacterial species and plant types.

Main Methods:

• Engineered 'sender devices' in bacteria (Pseudomonas putida, Klebsiella pneumoniae) to produce p-coumaroyl-homoserine lactone (pC-HSL) in response to specific inputs.
• Developed 'receiver devices' in plants (Arabidopsis thaliana, Solanum tuberosum) to activate gene expression upon detecting pC-HSL.
• Validated the system's modularity by using bacteria responsive to various stimuli (IPTG, aTc, arsenic) and testing in hydroponic and soil conditions.

Main Results:

• Successfully established functional bacterial-plant communication channels using the pC-HSL signaling molecule.
• Demonstrated the system's ability to convey diverse environmental stimuli from bacteria to plants.
• Validated the engineered communication system in both model and crop plants under different growth conditions.

Conclusions:

• Programmable interkingdom communication channels between bacteria and plants have been successfully developed.
• This technology enables microbial sentinels to relay environmental information to crops.
• The findings provide foundational components for designing sophisticated artificial microbial consortia for agriculture.