Genome-Wide Identification and Expression Analysis of Gene Family Associated with Abiotic Stress in Rice.

Rice () is one of the most important crops for humans. The homologs of -kaurene synthase (KS) in rice, which are responsible for the biosynthesis of gibberellins and various phytoalexins, are identified by their distinct biochemical functions. However, the KS-Like (KSL) family's potential functions related to hormone and abiotic stress in rice remain uncertain. Here, we identified the KSL family of 19 species by domain analysis and grouped 97 KSL family proteins into three categories. Collinearity analysis of among Poaceae indicated that the gene may independently evolve and and likely play a significant role in the evolutionary process. Tissue expression analysis showed that two-thirds of were expressed in various tissues, whereas and were specifically expressed in the root and in the leaf. Based on the fact that participates in the biosynthesis of gibberellins and promoter analysis, we detected the gene expression profiles of under hormone treatments (GA, PAC, and ABA) and abiotic stresses (darkness and submergence). The qRT-PCR results demonstrated that , , and responded to all of the treatments, meaning that these three genes can be candidate genes for abiotic stress. Our results provide new insights into the function of the KSL family in rice growth and resistance to abiotic stress.