Explanations of How Plants Respond to Light

By greene
May 27, 2015

I couldn't figure out why one of my plants looked parched/dry/thirsty even though I had watered the day before. Research tells me this plant is exhibiting a "nyctinastic" response to approaching night. The plant knew when it was day and when it was night, folded its leaves, and appeared to be napping. Wow, a nyctinastic response is fantastic. Do plants sleep? Yes, and they do a whole lot more. There are several types of nastic responses in the plant world.

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Avatar for LILINEWCAS
May 30, 2015 9:50 PM CST

I have lots of evening primrose flowers in my garden. Next time I look at them when the sun will come down, I will remember what you have taught me about photonasty. Very interesting.
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May 31, 2015 5:49 AM CST
Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
I have no use for internet bullies!
Avid Green Pages Reviewer Keeper of Poultry Vegetable Grower Rabbit Keeper Frugal Gardener Garden Ideas: Master Level
Plant Identifier Region: Georgia Native Plants and Wildflowers Composter Garden Sages Bookworm
Thank you, I tip my hat to you.
When I first grew the Evening Primrose I was unable to identify the first year flat rosette. I sent a message to Green Deane of "Eat the Weeds" and he was kind enough to send me a photo to help me identify which rosettes in my yard were weeds needing to be pulled and which were the Oenothera. After that I took photos like this one to help me remember:
Thumb of 2015-05-31/greene/f71f74

It is amazing to me how these flowered open in the blink of an eye just at sunset. I remembered to have my camera with me just as the sun went down below the trees and got this shot:
Thumb of 2015-05-31/greene/0dd4f2
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"
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