If that is not a weird headline, then I am not sure what is. Yet, believe it or not, it is largely, factually correct.
About 7 thousand years ago, during the Neolithic, when grapevines were first domesticated, a bacterium that lives on humans and causes acne moved to an interesting new abode, domesticated grapevines (Vitis vinifera L.). Since then, an essential DNA-repair gene in the microbe (Propionibacterium acnes) has mutated and no longer functions. Without such a gene the microbe appears to rely, yes indeed, on the grapevine for DNA repairs.
This is the first report of symbiosis between a plant and a microbe that is traditionally associated with animals. This interaction stands in contrast to the numerous microbes that have moved from animals to humans, more than a few leading to new human diseases. The bacterium P. acnes was confirmed to be present in the plants by Fluorescent in-situ hybridization, which localized P. acnes in the bark, in xylem fibers, and inside pith tissues [the soft, spongelike, central cylinder of the stems and roots of most flowering plants, composed mainly of parenchyma (thin-walled cells, unspecialized in structure)]. Parenchyma cells make up most of the soft tissue of plants.
It will be interesting to see what happens to this interesting field of study now that the first such transfer has been confirmed. Are there bacteria that move from plants to humans, and set up symbiotic relationship with cells in humans? Afterall, for every one cell in the human body there are approximately 10 bacterium. [Yes, in terms of shere numbers, we are 90% bacteria.]
The study can be found at: http://mbe.oxfordjournals.org/content/early/2014/02/19/molbev.msu075.abstract.