Overexpression of OsHsp 18.0 in rice enhanced tolerance to heavy metal stress

Abstract

Plants synthesis multiple families of sHSPs with monomer sizes ranging from 12 to 42 kDa, are the most diverse and more abundant than in other organisms (Wu et al., 2022). In addition to heat tolerance, the sHSPs suggesting that they may play important roles other cellular processes under normal conditions (Wu et al., 2022). Over the past decades, it has been observed that the expression of certain plant sHSPs is induced by a range of stressors, including heat, salt, drought, osmotic, hormonal, heavy metal, oxidative stresses, as well as developmental signals speci c to plants (Wu, et al. 2022). In addition, a multitude of investigation have involved the overexpression of various sHSPs in both homologous and heterologous plant systems, including E. coli and Yeast models (Santhanagopalan, et al. 2015;Waters and Vierling 2020). The outcomes of many of these experiments have revealed that stress protection conferred by these proteins is restricted to speci c conditions and narrow range of plant growth stages. On contrast, suppression of CI or CII sHSPs in A. thaliana by RNAi showed that these sHSPs were required for recovery from a severe heat stress (10 h at 45°C) and have independent functions (McLoughlin, et al. 2016;Wu, et al. 2022). However, additional investigations are needed to uncover further applications for these proteins.