| Popis: |
As a consequence of global warming, increasing temperature is a serious threat to crop production worldwide. Studies on plant stress tolerance and signaling are of important significance in both basic research and grain production. In recent years, major advances have been made in better understanding of heat stress signaling in higher plants, including several aspects such as sensory mechanisms of heat stress, regulatory networks involved in heat-responsive activation of Hsf and HSP genes, functional characterization of HSBP in establishment of heat tolerance in plants. As a harmful effect on cellular homeostasis, heat stress destabilizes membrane systems and structures of RNA and proteins, and leads to a dramatic alteration in enzymatic activities and cytoskeleton systems. Transcriptome analysis revealed that about 2% genes in the whole genome were activated in response to heat stress. Heat stress response represents the first line of inducible defense against imbalances in cellular homeostasis. Heat tolerance in plants is classified into basal thermotolerance and acquired thermotolerance. The acquired thermotolerance reflects the physiological adaptation of plants to heat stress when grown in the field. |
