https://www.selleckchem.com/products/colivelin.html The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused an ongoing pandemic of new coronavirus pneumonia (corona virus disease 2019, COVID-19). The virus has a long incubation period and strong infectivity, which poses a major threat to global health and safety. Detection of SARS-CoV-2 nucleic acid lies at the center of rapid detection of COVID-19, which is instrumental for mitigation of the ongoing pandemic. As of August 17, 2020, The National Medical Products Administration in China has approved 15 new coronavirus nucleic acid detection kits, 10 kits of which are based on reverse transcription-real-time quantitative PCR (RT-qPCR) technology. The remaining kits use five molecular diagnostic technologies different from RT-qPCR. This article reviews the principles, reaction time, advantages and disadvantages of above 15 detection kits, in order to provide references for rapid screening, diagnosis, prevention and control of COVID-19 and similar infectious diseases.The phenolic phytohormone salicylic acid (SA) is widely produced in plants, and is a key player in many processes of plant physiology, especially in plant immunity. During pathogen infection, SA is accumulated and the SA signaling pathway is activated to induce the expression of defense-related genes. Recently, a series of SA-related studies have been published. These researches filled gaps in the two SA biosynthesis pathways the isochorismate synthase (ICS) pathway and the phenylalanine ammonia-lyase (PAL) pathway. The NPR1 (nonexpresser of PR genes 1) and its paralogs, NPR3 and NPR4, were identified as SA receptors. The effect of type II TGAs (TGACG-binding factor) on SA downstream genes was shown to depend on the SA receptor they interacted with. This review will systematically introduce the progress on SA biosynthesis and signal transduction, aiming to provide a theoretical reference for in-depth study of SA regulation on plant devel