Chemical Signaling

Chemical-Signaling-Best-Of.mp3
Chemical-Signaling-Best-Of.mp4
Chemical-Signaling.mp3
Chemical-Signaling.mp4
Chemical-Signaling-intro.mp3

[Verse 1]
Pheromones
(Human moans)
Receptors
(Transmitters)

[Chorus]
Mark my words
(Mark my territory)
Here’s the story
(Words, molecular)

[Bridge]
… spectacular…. (for sure)
Future!

[Verse 2]
Welcome…
(To the Wood Wide Web)
Come to know “how come?)
(The flow the ebb)

[Chorus]
Mark my words
(Mark my territory)
Here’s the story
(Words, molecular)

[Bridge]
… spectacular…. (for sure)
Future!

[Outro]
Hear what I say
(In a different way)

A SCIENCE NOTE

Chemical signaling between plants and fungi—or between different types of animals—is similar to vocal or sound-based communication in some fundamental ways, even though the medium and method differ.

Similarities Between Chemical and Acoustic Communication

1. Purpose: Information Exchange

Both chemical signaling and vocalization are used to send messages about:

• Danger (e.g. predators, fire, disease)

• Mating or reproduction

• Territory or boundaries

• Resource location (food, water, nutrients)

2. Sender ➜ Signal ➜ Receiver Model

Both follow a communication model:

• Sender produces the signal (plant, fungus, animal)

• Signal travels through a medium (air, water, ground)

• Receiver detects and responds

3. Specialized Receptors

In both cases, the receiver must have specialized receptors to detect and interpret the signal:

• Ears detect sound vibrations.

• Cells or nerve endings detect specific molecules (like pheromones or fungal signals).

4. Direction and Specificity

• Sound can be directional (e.g., bird call from a tree).

• Chemicals can also be directional via gradients or localized release, especially in soil or water.

Examples of Chemical Signaling (Plants & Fungi)

▸ Mycorrhizal Networks (aka “Wood Wide Web”)

• Fungi form underground networks with tree roots.

• Trees release chemicals (e.g., sugars, defense compounds) into the fungal network.

• Fungi send nutrients and also relay warning signals about pests or drought to other trees.

▸ Plant-to-Plant Warnings

• A damaged plant (e.g., eaten by caterpillars) releases volatile organic compounds (VOCs) into the air.

• Nearby plants detect the VOCs and activate their own defenses (like producing bitter chemicals or growing faster).

Examples of Chemical Signaling (Animals)

▸ Pheromones

• Ants leave chemical trails for others to follow.

• Mammals may release pheromones to attract mates or mark territory.

• Humans even release subtle chemical cues that affect others’ behavior (e.g., sweat-related pheromones, though still debated).

So, How Is It “Like Voice”?

Think of chemical signaling as the biochemical equivalent of talking:

• Instead of vibrating air with vocal cords, the organism releases molecular “words.”

• Instead of eardrums, the receiving organism uses chemical receptors.

• Both are forms of language—just with different alphabets (molecules instead of sound frequencies).

From the album “Sound Sound“

The Human Induced Climate Change Experiment