Determination of auxin flow during phototropic responses using fluorescent auxin analogs

Abstract

Altered auxin distribution patterns and the formation of a lateral auxin gradient are often discussed in the context of phototropism. The DR5rev::GFP auxin reporter gene is commonly used in phototropism research in Arabidopsis. This study describes a fluorescent auxin analog, NBD-NAA, as an additional tool for the determination of auxin flow during phototropic responses.