Can yeast survive on Mars? IISc, Isro scientists discover promising clues

BENGALURU: The baker’s yeast that helps make bread and beer may maintain secrets and techniques to life past Earth. A brand new examine by researchers on the Indian Institute of Science (IISc) and Isro’s Physical Research Laboratory (PRL) means that the standard yeast can endure circumstances much like these discovered on Mars.The staff uncovered Saccharomyces cerevisiae – the widespread baker’s yeast – to high-intensity shock waves and perchlorate salts, each of which mimic the hostile Martian atmosphere. Using a High-Intensity Shock Tube for Astrochemistry (HISTA) in Bhalamurugan Sivaraman’s lab at PRL, the scientists generated shock waves reaching Mach 5.6, akin to these produced by meteorite impacts on Mars. The yeast cells have been additionally handled with sodium perchlorate, a poisonous salt current in Martian soil.“One of the biggest hurdles was setting up the HISTA tube to expose live yeast cells to shock waves – something that has not been attempted before – and then recovering yeast with minimum contamination,” stated Riya Dhage, lead creator of the examine and a mission assistant within the lab of Purusharth I Rajyaguru, affiliate professor in IISc’s Department of Biochemistry.Despite the acute therapy, the yeast survived, although its progress slowed down. The researchers discovered that the organism’s resilience got here from its capability to kind tiny, membrane-less buildings known as ribonucleoprotein (RNP) condensates, which defend and reorganise genetic materials throughout stress. Cells that didn’t kind these buildings have been far much less more likely to survive.“What makes this work unique is the integration of shock wave physics and chemical biology with molecular cell biology to probe how life might cope with such Mars-like stressors,” Dhage stated.Rajyaguru added that the examine might assist India’s rising astrobiology efforts. “We were surprised to observe yeast surviving the Mars-like stress conditions that we used in our experiments. We hope that this study will galvanise efforts to have yeast on board in future space explorations,” he stated.The findings not solely make clear how life may adapt to extraterrestrial environments but in addition on designing stress-resilient organic techniques for house missions.—-