Climate Change May Make Plants More Fragrant
A warming climate could lead to a more fragrant world, but it might disturb an intricate communication system used by plants, according to a review published recently in Trends in Plant Science.
When Jarmo Holopainen grew white cabbages in a greenhouse in Finland, he found that over many years of sunlight and elevated levels of carbon dioxide, the plants’ communication with the world was altered.
Cabbages and most vegetation emit chemicals called biogenic volatile organic compounds, or BVOCs, that are mostly undetectable by humans. But they notify other organisms of danger and opportunity, and also function as methods of plant-plant communication. When we can smell them, they manifest as fragrances.