Identification of CjSPL gene family in Ziyang Xiangcheng rootstock and expression pattern analysis / 生物工程学报

Squamosa promoter binding protein-like (SPL) family is a group of important transcription factors involved in the regulation of plant growth and development and the response to environmental stress, but there are few studies in perennial fruit trees such as citrus. In this study, Ziyang Xiangcheng (Citrus junos Sib.ex Tanaka), an important rootstock of Citrus, was used as the material for analysis. Based on plantTFDB transcription factor database and sweet orange genome database, 15 SPL family members were genome-widely identified and cloned from Ziyang Xiangcheng, and named CjSPL1-CjSPL15. Sequence analysis showed that the open reading frame (ORF) length of CjSPLs ranged from 393 bp to 2 865 bp, encoding 130-954 amino acids. Phylogenetic tree divided 15 CjSPLs into 9 subfamilies. Gene structure and conserved domain analysis predicted 20 different conserved motifs and SBP basic domains. Analysis of cis-acting promoter elements predicted 20 different promoter elements, including those related to plant growth and development, abiotic stress and secondary metabolites. The expression patterns of CjSPLs under drought, salt and low temperature stresses were analyzed by real-time fluorescence quantitative PCR (qRT-PCR), and many CjSPLs were significantly up-regulated after stress treatment. This study provides a reference for further study on the function of SPL family transcription factors in citrus and other fruit trees.

Research Progress in TCM Against Methicillin-resistant Staphylococcus Aureus Biofilms / 中国中医药信息杂志

Staphylococcus aureus is one of the most common clinical infectious pathogens, and abused antibiotics enhances its resistance. Methicillin-resistant Staphylococcus aureus (MRSA) is the major mutant strains. The generation of biofilm reduces the effects of antibiotics on Staphylococcus aureus, which makes the antibiotic therapy limited. New medicine need to be developed, and TCM as the natural medicine is becoming a hot spot. This article reviewed the research of TCM against MRSA biofilmsin recent years, and provided references for research and development of new medicine.