User blog comment:Fintin/Speculations and Predictions/@comment-5888163-20130227165404/@comment-6533407-20130227180254

I'm sry if this have not been confirmed and is spreading rumors but i read this in the devil fruit section:

Growth
When a Devil Fruit user dies, their ability is reborn into another fruit of the same kind. Instead of growing from a plant, the ability simply regenerates inside the closest appropriate fruit, as seen when Smiley "died" and the Sara Sara no Mi, Model: Axolotl transplanted itself into a nearby apple. Another characteristic of a Devil Fruit's growth is that the stem becomes noticably curlier than it was when the fruit was not endowed with the ability.