Plants Appear Green in Color Because They Reject Harmful color - Seeker's Thoughts

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Plants Appear Green in Color Because They Reject Harmful color

Everyone knows Green plants are green because they contain a pigment called chlorophyll. Chlorophyll absorbs a certain wavelength of light within the visible light spectrum. Chlorophyll absorbs light in the red (long wavelength) and the blue (short wavelength) regions of the visible light spectrum. Greenlight is not absorbed but reflected, making the plant appear green.

Researchers have long understood that plants use sunlight to photosynthesize carbon dioxide and water into food. 

But they didn’t know exactly why photosynthesizing organisms such as plants appear green.


But have u ever thought why plants appear in green color only?

Plants are green precisely because they don’t appreciate the type of energy that falls within the green spectrum.

To investigate further, scientists moved outside the scope of biology and turned to physics, looking at how the individual colors that make up the full spectrum can answer these questions.

A new study published in science – by Nathaniel Gabor, a physicist at the University of California, Riverside, and his co-authors built a model that reproduces the light-harvesting by these organisms.

The sunlight that appears white us contains many different colors, each with its own level of energy. The most intense type of solar light experienced on land is green, but while plants need a certain amount of sunlight to survive, they can also get too much of a good thing. Like humans, plants can burn if they receive more sunlight than they are equipped to deal with.

The plant can’t just move into the shade on their own and may get subjected to more light than they can handle if clouds suddenly lighten, or if the wind blows other left covering them out of the way.

According to Gabor, The green portion of sunlight can be too intense at times, and rapid changes in clouds or other types of cover can make green light too difficult for plants to sue safely. Instead, the plants reflect it --- basically rejecting green light.

How researchers tested this model on photosynthetic organisms of other colors?
Researchers found that purple bacteria reject purple light since that’s the strongest and most highly fluctuating type of light spectrum they receive in their habitat.
Similarly, green sulfur bacteria reject or more yellowish-green color because that is the strongest and most fluctuating type of spectrum they receive in the sea where they are found.

According to the study, besides reflecting light within a certain spectral range, the plant also takes in energy from separate portions of the color spectrum. Depending on the light condition, plants would adapt their light-harvesting strategy by switching between different portions of the spectrum.
For instance – under sunny, very bright conditions, a green plant would absorb energy from light further from green on the spectrum, such as violet. On the contrary, if it was cloudy, the same plant might absorb energy from light with colors closer to green such yellow.

This flexibility allows the plants to control the amount of energy that it takes in.
So when the light is too big they turn it to the low one when the light so too small they turn it to the high one.
The researchers behind this study are interested in using this understanding of plants to build more effective and adaptive solar panels.


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