The 'Little Shop of Horrors' contributes to science - fiction in multiple ways. First, it plays with the idea of abnormal plant behavior which can be related to genetic engineering concepts in science - fiction. Second, the relationship between the characters and the plant has elements of a symbiotic or parasitic relationship often explored in sci - fi. Also, the setting of a seemingly normal place turned into a horror - filled one because of a science - fictional element (the plant) is a great addition to the genre.
It contributes by introducing unique and imaginative concepts. The man - eating plant is a standout idea that adds to the science - fiction genre's repertoire of strange and dangerous entities.