The nopaline synthase (nos) promoter is active in a wide range of plant tissues and regulated by various environmental stimuli. It was previously found that the CAAT box region is important for nos promoter activity. In the present study, the location of the CAAT box element was determined by site specific mutation analysis. Point mutations within the conserved CAAT box element significantly reduced the promoter response in transgenic tobacco plants and calli to wounding, H2Oz, methyl jasmonate, and 2,4-D, but not to salicylic acid. However, mutations immediately upstream from the CAAT box did not affect these responses. These results suggest thai the CAAT box element is important in responding to certain stimuli.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.