environmental-pollution
Environmental pollution encompasses the introduction of harmful contaminants—including heavy metals, pesticides, air pollutants, and industrial chemicals—into ecosystems where they disrupt biological and ecological processes. For plant science, understanding pollution exposure is critical because plants serve as primary producers that absorb and accumulate contaminants from soil, water, and air, making them both sensitive indicators of environmental health and key vectors through which pollutants enter food chains. Research in this area informs strategies for phytoremediation, crop safety, and the preservation of plant biodiversity in degraded environments.
open_in_new WikipediaPubMed · 2026-04-15
Scientists discovered bacteria that can break down a common antibiotic pollutant found in soil and water, using two newly identified enzymes. Adding these bacteria to contaminated environments significantly reduced antibiotic residues and slowed the spread of antibiotic resistance genes.
Two newly identified enzymes, SamA1 and SamA2, initiate sulfacetamide breakdown; their amino acid sequences share only ~39% and ~35% similarity with any previously known enzymes, making them a genuinely novel discovery.
Combined expression of both enzymes produced a synergistic effect, degrading sulfacetamide more effectively together than either enzyme alone.
Bioaugmentation with the bacterial strain HA-1 significantly reduced antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) in experimental microecosystems, suggesting it can curb resistance spread, not just antibiotic levels.