The stability of soil microbial communities under drought stress is critical for sustaining ecosystem function in a changing climate. However, it remains unclear whether long‐term exposure to arid environments strengthens microbial drought resistance through adaptation, or instead diminishes it by reducing diversity and shifting functional redundancy. To address this, we sampled soil microbiota (including bacteria, fungi, and...

Summary Type II toxin‐antitoxin (TA) systems modulate many essential cellular processes in prokaryotic organisms. Recent studies indicate certain type II antitoxins also transcriptionally regulate other genes, besides neutralizing toxin activity. Herein, we investigated the diverse transcriptional repression properties of type II TA antitoxin PaHigA from Pseudomonas aeruginosa . Biochemical and functional analyses showed that...