The mantra that we always hear is that if the radiation isn't ionizing it's harmless. While this mechanism for worrying about non-ionizing radiation doesn't directly cause harm, it's not quite 'harmless' either.
This mechanism would render quite a few results not surprising. Biologically, there are many stages where not having DNA error correction could be more catastrophic than usual. It makes sense that seed germination is one of these; temporarily decreased sperm count in human males would be another.
The experiment to check this hypothesis is pretty obvious, and I'll probably be doing it sometime in the next few years, especially if I can get my nonprofit research org. up and running.
Edit: Footnote [1]https://en.wikipedia.org/wiki/Jacqueline_Barton