Chen Hao, Song Yujie, Li He, Zaman Shah, Fan Kai, Ding Zhaotang, Wang Yu
Tea Research Institute, Qingdao Agricultural University, Qingdao 266000, China.
Tea Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China.
Plants (Basel). 2023 Jul 29;12(15):2817. doi: 10.3390/plants12152817.
Tea plants are highly susceptible to the adverse effects of a high-temperature climate, which can cause reduced yield and quality and even lead to plant death in severe cases. Therefore, reducing the damage caused by high-temperature stress and maintaining the photosynthetic capacity of tea plants is a critical technical challenge. In this study, we investigated the impact of small oligopeptides (small peptides) and surfactants on the high-temperature-stress tolerance of tea plants. Our findings demonstrated that the use of small peptides and surfactants enhances the antioxidant capacity of tea plants and protects their photosynthetic system. They also induce an increase in gibberellin (GA) content and a decrease in jasmonic acid (JA), strigolactone (SL), auxin (IAA), and cytokinin (CTK) content. At the same time, small peptides regulate the metabolic pathways of diterpenoid biosynthesis. Additionally, small peptides and surfactants induce an increase in L-Carnosine and N-Glycyl-L-Leucine content and a decrease in (5-L-Glutamyl)-L-Amino Acid content, and they also regulate the metabolic pathways of Beta-Alanine metabolism, Thiamine metabolism, and Glutathione metabolism. In summary, small peptides and surfactants enhance the ability of tea plants to resist high-temperature stress.
茶树对高温气候的不利影响高度敏感，高温会导致产量和品质下降，严重时甚至会导致植株死亡。因此，减少高温胁迫造成的损害并维持茶树的光合能力是一项关键的技术挑战。在本研究中，我们调查了小肽和表面活性剂对茶树耐高温胁迫能力的影响。我们的研究结果表明，使用小肽和表面活性剂可增强茶树的抗氧化能力并保护其光合系统。它们还会导致赤霉素（GA）含量增加，茉莉酸（JA）、独脚金内酯（SL）、生长素（IAA）和细胞分裂素（CTK）含量降低。同时，小肽调节二萜生物合成的代谢途径。此外，小肽和表面活性剂会导致L-肌肽和N-甘氨酰-L-亮氨酸含量增加，（5-L-谷氨酰基）-L-氨基酸含量降低，并且它们还调节β-丙氨酸代谢、硫胺素代谢和谷胱甘肽代谢的代谢途径。总之，小肽和表面活性剂增强了茶树抵抗高温胁迫的能力。
