Rescue Technique of Plants: "Scream"

How Do plants react when in a Face of Stress?  

S c r e a m..!!!

A new finding point to the fact that in the time of calamities plants  emits ultra-sonic squeals.

In times of intense stress, people sometimes let out their angst with a squeal ⁠—  and plants might follow that path.  

 

However human screams, can be audible but plants sounds are much high-frequency based hence, we can not hear it with bear ears. However, when researchers placed microphones near stressed tomato and tobacco plants, the instruments picked up ultrasonic squeals about 4 inches (10 centimeters) away. The noises fell within a range of 20 to 100 kilohertz.

To plant a garden, is to believe in tomorrow.

Like animals, plants respond to stress in a variety of ways; studies suggest that plants may release smelly chemical compounds or change their color and shape in response to drought and bites from hungry herbivores. Animals seem to recognize and respond to these botanical stress signals, and even other plants appear to pick up on the airborne scents wafting from their tense neighbors. Its still not clear that can plants emit detectable noises, however past research indicated that plants do react to sounds.  

In previous studies, researchers affixed recording devices directly to plants to listen for secret sounds inside their stems. In plants stressed by drought, air bubbles formed, popped and triggered vibrations within the tissue that normally carries water up the plants' stems. This process is known as cavitation. See image below: 

 Researchers wanted to examine whether the ultrasonic sound can transmit through air so, the team set up microphones near stressed-out tomato and tobacco plants placed in either a soundproof box or an open greenhouse space. The researchers subjected one set of crops to drought conditions and another to physical damage. A third untouched group served as a point of comparison. 

The recordings revealed that the different plant species made distinct sounds at varying rates, depending on their stressor. Using machine learning — a type of artificial intelligence algorithm — researcher picked out distinct features in each set of sounds and successfully sorted their plants into three categories: "dry, cut or intact." Someday, farmers could use a similar technology to listen for drought-stressed crops in their fields. However the detailed research study paper is not been released yet. Stay tuned to Knowledge Express for more info....