“…In this sense it is worth mentioning that the secretion produced by the obturator in kiwifruit does not appear to be restricted to it, but also occurs on the base of the funicle, forming a continuous medium lining the pollen tube pathway from stigma to ovular exostome and could be associated with pollen tube guidance. The presence of a secretion covering the placental surface in the ovary has been described for other species as well (Singh and Walles, 1992) and has been associated with pollen tube passage (Tilton and Horner, 1980;Clifford and Owens, 1990;Peck and Lersten, 1991).…”