Plant Science

If it's not about plants, but it is about the natural environment of Death Valley, then this is the place to post your info or question.

Re: Plant Science

Postby mrfish » Sun Jun 23, 2019 8:41 am

C4 Plants
I came across an interesting plant called honeysweet at dvplants.com:
Thumbnail Image
At the bottom of the entry page it says:
honeysweet is a C4 plant and that it "has one of the highest rates of photosynthesis ever recorded."

Interesting and so what does that mean?
Contrasted to C3 photosynthesis, the C4 photosynthetic pathway is more efficient based on resistance to photorespiration which is a wasteful process. Unlike in C3 photosynthesis, the initial CO2-fixing enzyme PEPcase in C4 cycle does not act as oxygenase and therefore it does not fix O2 even when it is in high concentration within the cell.

So, in a nutshell, C4 photosynthesis is just more efficient than other forms of photosynthesis.
Examples of C4 species are the economically important crops corn or maize (Zea mays), sugarcane (Saccharum officinarum), sorghum (Sorghum bicolor), and millets, as well as the switchgrass (Panicum virganum) which has been utilized as a source of biofuel.

https://www.cropsreview.com/c4-plants.html
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Re: Plant Science

Postby mrfish » Sun Jun 23, 2019 8:48 am

Photosynthesis: Comparing C3, C4 and CAM
More info on different kinds of photosynthesis.
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Re: Plant Science

Postby twister » Mon Jul 29, 2019 7:26 am

This Family’s Fight Against Climate Change Starts At The Top Of Centuries-Old Trees
Interesting how they are able to clone these trees. Rather than focusing on climate change, it would have been better if they had focused on the technique used to clone the trees. What special equipment and chemicals are needed? I've heard that there are hormones available to help stimulate root growth of cuttings. The last thing we need is another propaganda piece on the topic of climate change.
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Re: Plant Science

Postby wildrose » Sat Nov 23, 2019 7:36 am

How drought is impacting giant sequoia trees
These trees use up to 1000 gallons of water a day. Under drought conditions they use less, but the problem there is that they also process less carbon dioxide when they slow down as the result of drought conditions.
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Re: Plant Science

Postby wildrose » Sat Dec 21, 2019 7:21 am

Triangle of U
Here's some interesting information about some members of the Mustard Family.
The triangle of U is a theory about the evolution and relationships among members of the plant genus Brassica. The theory states that the genomes of three ancestral diploid species of Brassica combined to create three common tetraploid vegetables and oilseed crop species. It has since been confirmed by studies of DNA and proteins.

LINK: https://en.wikipedia.org/wiki/Triangle_of_U
I came across this while looking up some info about Brassica oleracea:
https://en.wikipedia.org/wiki/Brassica_oleracea
It seems odd that cabbage, broccoli, cauliflower, kale, Brussels sprouts, collard greens, savoy, and kohlrabi are all members of the same species. They are considered different cultivars within the species, but they are so different in appearance that it doesn't seem possible that they are all the same species!
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Re: Plant Science

Postby ShotgunMary » Sat Dec 21, 2019 8:08 am

Kale, Cauliflower, and Brussels Sprouts Are the Same Species
They are the dog of the plant kingdom. Massive genomic events sound ominous!
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Re: Plant Science

Postby mrfish » Fri Jan 03, 2020 7:56 am

For plants that look so radically different to be all the same species makes no sense. There are lots of plants of different species which look more similar to each other. I guess maybe the saying "LOOKS AIN'T EVERYTHING" fits in here.
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Re: Plant Science

Postby camel » Tue Mar 10, 2020 6:52 pm

Good News: Daffodils Are The Worst
Other than an apparent misuse of the word mucilage, this is a really interesting video. Especially interesting is the info at the end about irises benefiting from what kills most other plants.
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