English to Spanish Science Botany

"Fungi-infected flowers exhibited significantly lower amouns of pollen germination and pollen tubes reaching the style, (...)"

"From each sample, I quantified total number of pollen grains, number of germinated pollen grains, and number of pollen tubes reaching the style."

What does "style" mean in this context? It *may* be a mistake, since the author of the paper is not a native english speaker.