Scientists Find a Virus That’s Evolved to Protect Its Host – Depending on The Weather – ScienceAlert

In a fascinating discovery, a widespread virus that usually harms plants from the cabbage family, such as broccoli and cauliflower, has been seen actually benefiting its hosts in times of crisis.
During periods of drought, researchers have found the turnip mosaic virus can switch from a hindrance to a help, altering its host’s circadian clock so the plant loses less water. 
In the study, when a species of wild weed, known as the thale cress (Arabidopsis thaliana), was infected with a particular…

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