photosynthesis - Jean Sainvil - In God We Trust - Blessed is the man who comes in the name of God.

The Real Reason Leaves Change Color In the Fall

You’ve probably heard that leaves of deciduous trees change color in autumn because they lose their green chlorophyll molecules, allowing the underlying yellow and orange pigments to shine through. However, this doesn’t explain why the leaves change color in the first place.

LEARN MORE
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To learn more about this topic, start your googling with these keywords:
– Leaf senescence
– Chlorophyll
– Carotenoid
– Anthocyanin

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CREDITS
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Peter Reich | Script Writer
Henry Reich | Script Writer, Narrator and Director
Ever Salazar | Illustration, Video Editing and Animation
Nathaniel Schroeder | Music

Our staff: Alex Reich, Peter Reich, Emily Elert, Ever Salazar, Kate Yoshida, and Henry Reich

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OTHER CREDITS
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Maple Tree – William Warby

Red Maple Tree – John Brueske
http://www.shutterstock.com/pic-28786426/

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REFERENCES
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Hoch, W. A., Singsaas, E. L., & McCown, B. H. (2003). Resorption protection. Anthocyanins facilitate nutrient recovery in autumn by shielding leaves from potentially damaging light levels. Plant Physiology, 133(3), 1296-1305.

Feild, T. S., Lee, D. W., & Holbrook, N. M. (2001). Why leaves turn red in autumn. The role of anthocyanins in senescing leaves of red-osier dogwood. Plant physiology, 127(2), 566-574.

Why Are Leaves Green? Part 2

Still wondering why leaves are green and not purple or even black? CHLOROPHYLL! It’s how leaves work.

CREDITS
*********
Created by Henry Reich, with Alex Reich, Peter Reich, Rose Eveleth, Emily Elert, and John Guittar.
Music by Nathaniel Schroeder http://www.soundcloud.com/drschroeder
Thanks to ScienceAlert for support – http://www.sciencealert.com

MinuteEarth is produced by Neptune Studios LLC
https://neptunestudios.info

REFERENCES
**************
Papers referred to in the making of this video:
Blankenship, Robert E. 2010. Early evolution of photosynthesis. Plant physiology 154(2): 434-438. http://www.plantphysiology.org/content/154/2/434.full.pdf+html

Hohmann-Marriott, M. F., & Blankenship, R. E. 2011. Evolution of photosynthesis. Annual review of plant biology 62: 515-548. http://www.annualreviews.org/doi/abs/10.1146/annurev-arplant-042110-103811

Raven, J. A. 2009. Functional evolution of photochemical energy transformations in oxygen-producing organisms. Functional Plant Biology 36(6): 505-515. http://www.publish.csiro.au/?act=view_file&file_id=FP09087.pdf

Why Are There Penguins At The Equator?

Making My Own Oxygen With Photosynthesis

Click the blue button to donate now, or go to https://teamtrees.org/

In this video I show you a really neat experiment that lets you actually see photosynthesis happening in front of your eyes. I use spinach leaf disks soaked in baking soda that have had the air sucked out of them, then I shine light on them in order to induce photosynthesis. The leaves then make oxygen which makes them float in water due to the increased buoyancy. This video is part of the #teamtrees collaboration!

*recipe for water solution in video:
-1/8 tsp baking soda to 300 ml of water
-1 drop of liquid soap

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*Any experiment you try is at YOUR OWN RISK. The Action Lab assumes no responsibility for any injury if you attempt anything you see in this video or on my channel.

What If You Feed a Venus Flytrap Candy Instead of Flies?

In this video I talk about how Venus flytraps can count and how they know what they are eating. I try to feed my Venus flytrap candy to see if it will actually digest it.

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Watch other popular videos from my channel
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Warning: DO NOT TRY—Seeing How Close I Can Get To a Drop of Neutrons

*Any experiment you try is at YOUR OWN RISK. The Action Lab assumes no responsibility for any injury if you attempt anything you see in this video or on The Action Lab channel.