So, I had some youtube playlist on in the background, and stopped and listened a bit extra on a video called "GROWING EXPOSED S2 EP7: THREE FINGER FARM". I'm not really a fan of the "Growing Exposed", the production is sh*t, with those beats cranked up waaaaay to high most of the time. But, they do go visit some interesting growers all around North-America.
Anyways, around 15:10 into the video they interview some tonto about genes and phenotypes. He says that "
we all know that a plant can't photosynthesize if the leaves are purple." Now in the previous 2 minutes, he used tomatoes as an example, so I'm not sure if this guy is referring to only cannabis, or plants in general.
However........ If you look at botany in general, the statement "
a plant can't photosynthesize if the leaves are purple" is sh*t.
I took a bit of research trip this morning, and dug out a few papers from Oregon State / Arizona State / Georgia State University had this to say, and they summarized the topic quite well:
"
Plants have three pigments that reflect basic bands in the color spectrum. These pigments in combination give us familiar plant colors. Chlorophylls absorb red and blue light. They reflect green light that they don’t need for photosynthesis, so we see green leaves. Carotinoids absorb blue-green and blue light. They reflect yellow or yellow orange light, giving us yellow leaves in the fall and vegetables such as carrots. Anthocyanins absorb blue, blue-green and green light. They reflect red and purple light, hence red cherries and purple grapes."
"
Purple leaves contain more anthocyanin than chlorophyll. The anthocyanin masks the chlorophyll so we see more purple. The chlorophyll is still there conducting photosynthesis. Purple leaves growing in the shade produce more chlorophyll. If examined closely, they are a muddy purple in color or even may look green."
sciencing.com had this interesting fact to say on the subject:"
Anthocyanins may act as a sun screen so when the plant's leaves turn colors in fall the anthocyanins help protect the leaf to the last second so it can continue to provide energy to the plant."
Plants with purple leaves are also found in more dim/lower-light conditions, found in the undergrowth. They use the purple to gather up more heat and light compared to the green color. Often the underside is purple on the leaves, to keep the light in the leaf, not having it bounce out as quickly as green leaves do. I have included a image of a plant I grow myself with this, called: "Tradescantia zebrina".
So in fact, purple leaves can be just as healthly and good for the plant when including the environment that it grows in. Colored leaves even have added "function" compared to normal green leaves.
If anyone is interested, a good documentary on the history of botany and, I think, it is in this documentary that purple leaves are mentioned as well, is the BBC documentary "Botany: A Blooming History".
I'm always open to new knowledge. Does anyone have any information on this guys statement?
Would this be something complately against the rest of how nature works, and only seen in cannabis?
What do you guys know? Hit me up with some of that wisdom!!