MIT Scientists Turn Bacteria into Living Computer Chips

Topic: Biology

Researchers at MIT engineered bacteria to work like transistors, creating living 'circuit boards' that can be printed onto growth material. This breakthrough could help plants detect and respond to environmental stresses.

Scientists at the Massachusetts Institute of Technology (MIT) have made a groundbreaking discovery in the field of synthetic biology. They have engineered bacteria to work like transistors, creating living 'circuit boards' that can be printed onto growth material inside a Petri dish.

In conventional electronics, transistors act as switches that control whether electrical current can pass through a circuit. In the MIT system, engineered bacterial cells perform a similar role by regulating the movement of small signaling molecules. These molecules then carry information to other components in the biological circuit.

The researchers created two types of bacterial transistors and three additional bacterial strains that act as relays between them. Together, these five strains provide a modular set of components that can be arranged to build nearly any kind of circuit. In the new study, the team demonstrated circuits capable of adding two or three inputs and directing a single input toward a selected destination.

One potential use is to place these living circuits on plant leaves or roots. There, the bacteria could process information about environmental conditions, helping plants detect and respond to stresses such as drought or pest attacks.

Why It Matters

This breakthrough has significant implications for agriculture in India, where crop yields are often affected by environmental stresses like drought and pests. By using living circuits to monitor and respond to these stresses, farmers could improve crop yields and reduce the need for pesticides and other chemicals.

Key Facts

• MIT researchers engineered bacteria to work like transistors, creating living 'circuit boards'.
• The team created two types of bacterial transistors and three additional bacterial strains that act as relays between them.
• These five strains provide a modular set of components that can be arranged to build nearly any kind of circuit.
• The researchers demonstrated circuits capable of adding two or three inputs and directing a single input toward a selected destination.
• One potential use is to place these living circuits on plant leaves or roots to help plants detect and respond to environmental stresses.

Key Terms

Transistor

A device that acts as a switch, controlling the flow of electrical current in a circuit.

Synthetic biology

The use of engineering principles to design and construct new biological systems or modify existing ones.

Implications

This breakthrough has significant implications for agriculture in India, where crop yields are often affected by environmental stresses like drought and pests. By using living circuits to monitor and respond to these stresses, farmers could improve crop yields and reduce the need for pesticides and other chemicals.