Seed priming techniques have been used to increase germination and improve activities antioxidant enzyme by plant hormones/regulators under different various stress conditions. In pepper, a remarkable enhancement in GP was observed through seed priming with ALA under cold stress. The improved GP observed in our study is most likely due to the enhanced antioxidant enzymes activities just like ALA improved GP in pepper. Therefore, ALA may be employed as effective approach to improving seed germination and plant growth under stress conditions. In the plant mitochondria, electron transfer along the respiration chain is coupled to the formation of ATP, and the redundant electron leads to the formation of ROS if ATP synthesis is blocked. ALA is the first precursor in the biosynthesis of porphyrin compounds such as chlorophyll and heme, a key element required for cytochrome c activity in the respiration chain of the mitochondrion. Respiration, a temperature-dependent and heme-requiring process, increases during germination in order to provide necessary energy. Under cold stress, decreased respiration rates and ATP contents were observed in germinating seeds from both sources, while respiration was enhanced in seeds treated with ALA.Thus, it is suggested that DEET exogenous ALA may promote ATP synthesis and enhance seed activity, both having a positive effect on seed germination under cold stress.A similar antioxidant stress effect of exogenous ALA was observed in salt-stressed pakchoi seeds. In addition, cold stress reduced Chl concentration and endogenous ALA level while application of exogenous ALA increased Chl concentration and endogenous ALA release in germinating seeds, suggesting application of exogenous ALA prior to cold stress could mitigate inadequate biosynthesis problem. Platelets are small anucleated cell fragments derived from the cytoplasm of bone marrow megakaryocytes. At sites of vascular injury, platelets adhere and aggregate on the exposed CASIN subendothelial extracellular matrix and thereby form a plug that seals the wound. This process is essential for normal hemostasis, but in diseased vessels it may lead to pathological thrombus formation and infarction of vital organs.