Tue Aug 26 00:30:00 UTC 2025: **News Article:**
**IIT-Bombay Researchers Uncover Key to Predicting (and Potentially Directing) Microbial Evolution**
MUMBAI – August 26, 2025 – In a groundbreaking study, researchers at the Indian Institute of Technology (IIT)-Bombay have demonstrated that subtle variations in nutrient presentation can dramatically alter the evolutionary paths of microbes. The findings, published in *npj Systems Biology and Applications* and *BMC Ecology and Evolution*, could revolutionize our understanding of evolution and pave the way for applications in diverse fields, from medicine to biofuels.
Led by Prof. Supreet Saini, the team focused on the common gut bacterium *Escherichia coli* and the baker’s yeast *Saccharomyces cerevisiae*. The researchers manipulated the presentation of chemically related sugars, glucose and galactose, offering them either as a simple mix or as more complex sugars like lactose and melibiose. Over 300 generations, the microbes evolved along strikingly different trajectories, with variations in growth rate and biomass production.
“We didn’t expect these subtle differences to create completely distinct adaptive paths,” said Neetika Ahlawat, a postdoctoral scholar and author on both studies. “The findings suggest that the way a cell responds to a nutrient can influence which mutations are beneficial and what paths evolution can take.”
Interestingly, when these evolved microbial populations were introduced to new sugar environments, their subsequent growth was predictable based on their ancestors’ initial responses. This “pleiotropic response” highlights the interplay between flexibility and constraint in evolution.
“It’s a nice reminder that evolution is both flexible and constrained,” said Pavithra Venkataraman, a former PhD student at IIT-Bombay and an author of the E. coli study.
The implications of this research are far-reaching. By carefully controlling nutrient combinations, scientists may be able to guide microbial evolution to develop strains with desired traits, such as faster growth or increased efficiency. This could be invaluable in food and beverage production, pharmaceuticals, and biofuel development.
Furthermore, the study suggests a novel strategy to combat antibiotic resistance by limiting the evolutionary options available to pathogens. “We could imagine using resources to limit the evolutionary paths available to pathogens, making it harder for antibiotic resistance to emerge,” Prof. Saini explained.
While still in its early stages, this research offers a promising glimpse into the potential of understanding and even directing the complex processes of evolution, opening new avenues for innovation across various industries.
First Piper 