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15 July 2024
Residents of desert regions are familiar with the scent of rain and the euphoric sensation accompanying a storm sweeping the arid terrain. New research indicates that this experience and its associated health advantages. It may stem from oils and other chemicals that desert plants release following thorough soaking.
The Sonoran Desert boasts an extraordinary diversity of flora renowned for emitting aromatic volatile oils. Many of which confer stress-reducing benefits to humans, wildlife, and plants.
Scientific studies have revealed that these volatile organic compounds, which plants evolved initially to shield themselves. From things such as solar radiation, heat waves, drought stress, and predators, may also offer significant health benefits to humans.
The practice of “forest bathing,” originating from the coniferous forests of eastern Asia. It involves spending time in nature to alleviate stress and promote overall well-being. While the nearest forests in Arizona lie thousands of feet high in the Catalina Mountains. Similar beneficial compounds can be found in desert plants, particularly noticeable after the thunderstorms of the monsoon season. The Southwest monsoon season typically spans from June 15 to September 30. Delivering approximately half of the region’s annual rainfall over three-and-a-half months.
Researchers have identified 115 volatile organic compounds within 60 species of plants in the Sonoran Desert, released immediately before, during, and after rainfall. Among these compounds, 15 have been shown in previous studies to provide tangible health benefits.
These fragrant, volatile organic compounds emitted by desert plants improve sleep patterns, stabilize emotional hormones, enhance digestion, sharpen mental clarity, and reduce feelings of depression or anxiety. Their release into the atmosphere just above desert vegetation creates the characteristic scent of rain experienced by many. Moreover, they shield against harmful solar radiation. Protecting both the desert plants and the wildlife that depend on them for sustenance, shelter, and the human inhabitants.
Many desert plants increase their production of volatile oils during the summer to cope with harsh environmental conditions. Previously, it was believed that the oily and resinous substances produced during extreme droughts and heatwaves were washed away during summer rains. However, evidence suggests that with increased humidity and strong winds accompanying the onset of rain, these substances are released into the atmosphere even before the rain begins, contributing to the exhilarating anticipation felt just before the first drops of a thunderstorm. Subsequently, these compounds are inhaled into our lungs and swiftly enter our bloodstream.
One of the most iconic plants in the Sonoran Desert, the creosote bush, is often credited with imparting the region’s distinctive smell after rain. One of the therapeutic compounds contributing to this scent is trans-caryophyllene, which interestingly originates from a fungus residing within the plant rather than the plant itself.
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