There is a heat wave in the UK, and at least in the north, where I live, not a single drop of rain has fallen for at least three weeks. I quite like it, especially since last year was basically one long, wet, windy autumn and I was craving for a real summer. But, with temperatures this high, and with this little rainfall, many plants are starting to look a bit poorly. Grass is turning brown, and forbs are hanging their heads. Especially in the north of England, where normally everything is lush and green around this time, this is an unusual sight.
I know this all too well, because I am running a drought experiment – our drought pots have been tortured to the max and we wouldn’t have needed the sturdy roofs, while we had to water our control pots.
So, plants are having a hard time, and I can imagine farmers are becoming worried. Because summer droughts are expected to increase in the UK, and when crops are stressed to their limit, this will lead to yield reductions. Modern agricultural crops have evolved to be adapted to high-resource, low risk environments, and have very different properties than their wild ancestors (read this great paper by García-Palacios et al.) – properties that are not much good for resisting drought conditions.
However, if you think that carnage is going on aboveground, then take a look belowground. Continue reading