100-million-year-old mistake provides snapshot of evolution
51 replies, posted
[b]Research by University of Leeds plant scientists has uncovered a snapshot of evolution in progress, by tracing how a gene mutation over 100 million years ago led flowers to make male and female parts in different ways.[/b]
[quote]
The findings – published this week in the Proceedings of the National Academy of Sciences (PNAS) Online Early Edition – provide a perfect example of how diversity stems from such genetic 'mistakes'. The research also opens the door to further investigation into how plants make flowers – the origins of the seeds and fruits that we eat.
In a number of plants, the gene involved in making male and female organs has duplicated to create two, very similar, copies. In rockcress (Arabidopsis), one copy still makes male and female parts, but the other copy has taken on a completely new role: it makes seed pods shatter open. In snapdragons (Antirrhinum), both genes are still linked to sex organs, but one copy makes mainly female parts, while still retaining a small role in male organs – but the other copy can only make male.
"Snapdragons are on the cusp of splitting the job of making male and female organs between these two genes, a key moment in the evolutionary process," says lead researcher Professor of Plant Development, Brendan Davies, from Leeds' Faculty of Biological Sciences. "More genes with different roles gives an organism added complexity and opens the door to diversification and the creation of new species."
By tracing back through the evolutionary 'tree' for flowering plants, the researchers calculate the gene duplication took place around 120 million years ago. But the mutation which separates how snapdragons and rock cress use this extra gene happened around 20 million years later.
The researchers have discovered that the different behaviour of the gene in each plant is linked to one amino acid. Although the genes look very similar, the proteins they encode don't always have this amino acid. When it is present, the activity of the protein is limited to making only male parts. When the amino acid isn't there, the protein is able to interact with a range of other proteins involved in flower production, enabling it to make both male and female parts.
"A small mutation in the gene fools the plant's machinery to insert an extra amino acid and this tiny change has created a dramatic difference in how these plants control making their reproductive organs," says Professor Davies. "This is evolution in action, although we don't know yet whether this mutation will turn out to be a dead end and go no further or whether it might lead to further complexities.
"Our research is an excellent example of how a chance imperfection sparks evolutionary change. If we lived in a perfect world, it would be a much less interesting one, with no diversity and no chance for new species to develop."
The researchers now plan to study the protein interactions which enable the production of both male and female parts as part of further investigation into the genetic basis by which plants produce flowers.
[/quote]
[url=http://www.physorg.com/news/2010-10-million-year-old-snapshot-evolution.html]Source[/url]
Cool
That's... Interesting, to say the least.
Evolution is such an awesome thing.
Shame some people still don't think its real.
no this is obviously the work of our Lord Jesus Christ he told the gene to mutate and so it did and over the 100 million years that gene obeyed its Lord to make female and male parts according to his testament
:science:
[editline]18th October 2010[/editline]
[QUOTE=w 1 z;25497601]no this is obviously the work of our Lord Jesus Christ he told the gene to mutate and so it did and over the 100 million years that gene obeyed its Lord to make female and male parts according to his testament[/QUOTE]
But the bible tells me the earth is only 6000 years old. :saddowns:
[QUOTE=OvB;25497612]:science:
[editline]18th October 2010[/editline]
But the bible tells me the earth is only 6000 years old. :saddowns:[/QUOTE]
Dinosaurs came from outer space to Earth so they can die in peace and go to Heaven :3
evolution is cool.
omg stop piking on christians
Atheistic slander, the Bible says nothing about this.
[QUOTE=LCBADs;25497871]omg stop piking on christians[/QUOTE]
Yea that's wrong! Santa created all of us equal and we should not treat people different because of that
what do Christians say about dinosaurs?
[QUOTE=Helix Alioth;25497180][b]plant scientists[/b][/QUOTE]
I think the word you're looking for is [i]botanists[/i].
[QUOTE=ButtsexV3;25498079]I think the word you're looking for is [i]botanists[/i].[/QUOTE]
Nah.
They're half plant, half scientists.
Edit: Why do you think they're so interested in gendered plants? :smug:
[QUOTE=Super Mario Moonshine;25499905]Nah.
They're half plant, half scientists.
Edit: Why do you think they're so interested in gendered plants? :smug:[/QUOTE]
this explains everything
you've opened up my eyes
etc.
every interesting.....
[QUOTE=Signedoutz;25497918]what do Christians say about dinosaurs?[/QUOTE]
That humans lived side by side with them or something like that.
[QUOTE=Signedoutz;25497918]what do Christians say about dinosaurs?[/QUOTE]
They all ate plants, we lived side by side, they all died in the great flood and thats why we find their bones buried under all the ground which was carried by water.
:suicide:
[QUOTE=OvB;25497612]But the bible tells me the earth is only 6000 years old. :saddowns:[/QUOTE]
Of course it is! These "Fossils" are just hoaxes placed there by evolutionists to cover up the evidence from the Great Flood with their atheist evolutionist agenda!
Praise Jesus!
which evolution is this
[QUOTE=Goberfish;25505031]which evolution is this[/QUOTE]
Digivolution
your all idiots this is obviously proof that jesus can make evolution
[QUOTE=Goberfish;25505031]which evolution is this[/QUOTE]
One amino acid switched in a protein, making a flower handle sexual organs differently. This happens all of the time, it just usually causes cancer or horrible birth defects. This is an example of one individual mutation that caused an evolutionary leap instead.
Evolution haha, funny scientists. It's just a test of faith.
[QUOTE=ASmellyOgreV2;25505101]One amino acid switched in a protein, making a flower handle sexual organs differently. This happens all of the time, it just usually causes cancer or horrible birth defects. This is an example of one individual mutation that caused an evolutionary leap instead.[/QUOTE]
so which evolution does this prove?
[QUOTE=Goberfish;25505171]so which evolution does this prove?[/QUOTE]
It's another piece of evidence for biological evolution.
You know the real world evolution...
Praise the Lord and obviously they meant 6000 years, not millions of years
I believe in God [b]and[/b] Evolution.
:c00lbert:
[QUOTE=w 1 z;25497601]no this is obviously the work of our Lord Jesus Christ he told the gene to mutate and so it did and over the 100 million years that gene obeyed its Lord to make female and male parts according to his testament[/QUOTE]
Herp derp someone said something about evolution, looks like it's time to talk out my ass about something I have no idea about! :downs:
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