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Abstract
It is important to reveal the mechanism of plants coping with heat stress, which results in a severe retardation in crop growth and development. Although Synaptotagmin A (SYTA) regulates the cell endocytosis and the plasma membrane reparation of Arabidopsis, its roles in heat resistance are not well understood. In this study, we obtained the new finding that SYTA is related to the heat resistance of Arabidopsis. In the SYTA overexpression strains, the germination rate of the seeds and the survival rate of the seedlings improved after heat shock treatment, and their degree of membrane peroxidation was reduced. However, syta mutant showed the opposite results. Meanwhile, the expressions of some heat stress signal pathway genes were higher in SYTA overexpression strains than that in wild-type strains, and were lower in syta mutant strains. These results suggested that SYTA responded positively to heat shock and was involved in the heat stress signal pathway.
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