Board Thread:Theories and Speculation/@comment-28323245-20170530200422/@comment-734582-20170601102935

Darksusanoo wrote: The Tree is the origen of chakra and half of what made the Ten Tails, which did have Wood Release powers So far the actual Shinju hasn't shown any power. When a human consumes the fruit it grants them power. But we've also seen that that power is passed on genetically, so it's entirely possible that it's the human part that grants the ability to actually use the chakra (spiritual energy and all that).

So i find it hard to believe that the Zetsu got their power from a poorly defined thing we know little about, rather than from a guy we know had wood release, got his cells implanted into zetsu and so forth.