Abstract
Polyamines are stress-responsive molecules that enhance the tolerance of plants to multiple abiotic stresses by regulating a variety of biological processes. Our previous research indicated that heat stress induces the the biosynthesis of polyamines and promotes the conversion of putrescine to spermidine in G. lucidum, but the physiological role of elevated spermidine levels is yet to be elucidated. In this study, our findings demonstrated that spermidine enhances the heat tolerance in G. lucidum and that mitochondrial respiration is essential for spermidine-enhanced heat tolerance. This study elucidated a preliminary mechanism by which spermidine enhances heat tolerance of G. lucidum and provided a new insight into the understanding of how microorganisms resist heat stress.
Published Version
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