There is absolutely no reason to believe it would have any beneficial effect whatsoever. Isoflavones and other 'phytoestrogens' are produced by some plants, not all. The biological interest primarily revolves around how they affect mammals (including humans), with their role in plants being for defense. Did you read the article?
It's a long shot for "larger, more potent buds". There are easier, more practical and obvious ways. Look into harpin protein, for instance, they have products for plants based on that.