Plants respond to abiotic stress on physiological, biochemical and molecular levels. This includes a global change in their cellular proteome achieved by changes in the pattern of their protein synthesis and degradation. The ubiquitin-proteasome system (UPS) is a key player in protein degradation in eukaryotes. | Nội dung Text The Arabidopsis paralogs PUB46 and PUB48 encoding U-box E3 ubiquitin ligases are essential for plant response to drought stress