How Does Light Affect Plant Growth?
The Beet: A Podcast For Plant Lovers
Epic Gardening
4.8 • 1.6K Ratings
🗓️ 19 May 2017
⏱️ 6 minutes
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| 0:00.0 | Hello everyone. Welcome back to the Epic Gardening Podcast. As always my name is |
| 0:05.4 | Kevin and I am the founder of Epic Gardening.com where I try to put out the most |
| 0:09.8 | informative and helpful gardening information on the internet. |
| 0:13.4 | Today we are answering the question, how does light affect plant growth? |
| 0:18.9 | It's a complex question and of course I'm not a botanist and I'm not a lightning expert I am just a simple |
| 0:25.2 | gardening layman just like you so I'll explain this as I've learned it and of |
| 0:29.2 | course it might be more complex there might be more details that I could have added if I was one of these |
| 0:34.0 | experts, but I found that this is a pretty helpful overview as to how light is used by plants. |
| 0:41.1 | So the first question we should ask ourselves is why do plants even need light? |
| 0:45.0 | Well, you might recall your old science classes in grade school where you discussed photosynthesis. |
| 0:51.0 | Perhaps it looked like a jumble of numbers and letters in a chemical equation showing how light is converted into energy, |
| 1:01.2 | but that's not so necessary to us as gardeners. Of course, it's interesting |
| 1:06.3 | if you want to get that deep about it, but the basic overview is plants use light light water, carbon dioxide to make sugar, which is converted into |
| 1:17.1 | ATP by cellular respiration. |
| 1:21.1 | Chlorophyll that plants have in their cells absorbs the sun's energy. |
| 1:26.0 | Carbon dioxide enters the leaves through tiny little pores and the roots draw up water and nutrients from the soil. The energy from the light is what |
| 1:34.8 | chops up the water molecules, kind of like your favorite horror movie villain. So this horrific |
| 1:39.9 | act gives us the oxygen we need to breathe, so I guess it's really not all that |
| 1:43.7 | horrifying, and then carbon dioxide befriends the abandoned hydrogen to make the |
| 1:49.2 | plants fuel. But plants do not just need any type of light. They need a specific type of light. |
| 1:56.4 | So what kind of light do plants need? There is a spectrum of light that is based on |
| 2:02.3 | the length of the wave. So the |
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