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文献
Abstract 背景：Salicylic acid (SA) is an important plant hormone and signal required for establishing resistance to diverse pathogens and plant diseases. The abundant polyphenols in tea plants also defend plants from biotic and abiotic stresses. However, whether exogenous SA would increase the resistance of tea plants to adversity and the relationship between SA and polyphenols are still poorly understood. 结果：Here, we carried out SA treatment on tea seedlings and performed transcriptome sequencing. SA treatment inhibited the phenylpropanoid and flavonoid metabolic pathways but promoted the lignin metabolic pathways. The increased accumulation of lignin in tea leaves after treating with SA indicated that lignin might coordinate SA, enhance, and improve plant defense and disease resistance. Simultaneously, an SA-inducible flavonoid glucosyltransferase (CsUGT0554) specifically involved in 7-OH site glycosylation was characterized in vitro. 结论：These results provided valuable information about the effects of SA on tea seedlings and the molecular basis for SA-mediated immune responses. 代表图片
中文摘要 水杨酸（SA）是对多种病原体和植物疾病的抗性所需的重要植物激素和信号。茶树中丰富的多酚还保护植物免受生物和非生物胁迫。然而，外源SA是否会增加茶树对逆境的抵抗力以及SA和多酚之间的关系仍不清楚。在这里，我们对茶树幼苗进行了SA处理，并进行了转录组测序。SA处理抑制了苯丙烷和类黄酮代谢途径，但促进了木质素代谢途径。SA处理后，木质素在茶叶中的积累增加，表明木质素可能协调SA，增强和改善植物的防御和抗病性。同时，在体外鉴定了一种特异性参与7-OH位点糖基化的SA诱导的类黄酮葡萄糖基转移酶（CsUGT0554）。这些结果为SA对茶树幼苗的影响以及SA介导的免疫应答的分子基础提供了有价值的信息。 |
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