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Cancerous Plants

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Cancerous Plants

Postby mith » Wed Mar 09, 2005 8:16 pm

After reading the Human Plant thread, I just had a thought...
Why don't plants get "skin" cancer? Meaning why don't they get cancer from the exposure to their leaves?
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Whada conseq.

Postby 2810712 » Thu Mar 10, 2005 9:34 am

Whada consequense mithril ! ! !, I was just going to post the same question.
I also wanna know what is the mechanism in plants that regulates cell life cycle i.e. analogous to apoptosis, any body knows???

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Postby adidasty » Thu Mar 10, 2005 10:45 pm

If I'm not mistaken...plant cells either die naturally due to lack of nutrients and water or they remain living and functioning in a plant. I'm not sure that programmed cell death or apoptosis is very common in plants, or not that ive heard of. i suppose radiation to plants just causes mutations in DNA and then a malformed or missense protein is formed or a protein is missing or nonfunction and radiation kills the plant. eh, but youd think natural selection would vie for plants to be able to defend their genomes as we do with p53 and other "genome helpers"...im not really sure. remember though, that cancer cells are generally human body cells that have had mutation or genetic disfiguration which makes them insusceptible to cell growth inhibition and contact inhibition...cancer cells are, in essence, wild, uncontrolled somatic cells. can plant genomes be disfigured by the same mutagens that other animal genomes can? something to think about...
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Postby adidasty » Thu Mar 10, 2005 10:49 pm

After some research I see my hypothesis was partially correct. There are fewer plant carcinogens than animal carcinogens and plants ONLY respond to plant carcinogens- most of which have little or no effects on humans. Some outgrowths or galls are caused by misplaced or maldeveloped cells- analogous to cancerin animals. Plant carcinogens have been known to be transferred by certain insects but overall, cancer is not very prevalent in the kingdom Plantae.
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Postby 2810712 » Fri Mar 11, 2005 9:41 am

IN animals [ higher] there is the mechanism that can recognise and kill cancer cells ,
Also, there is apoptosis system for cell death. Both of these being absent in plants I think, If mutations are allowed to occur there are more chanses of increase in cancerous mass of the plant[ if cancer occurs] , I think, but I could find nowhere the mention of plants and cancer.
Now, plants are , as adidasty said , evolved tto avoid mutations how could they continue to evolve and respond to our mutagens? So, it may be that plants have some mechanism to avoid mutations due to radiation, but can there be any mechanism like that??? I think there can be, but it is not ! ! !

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Postby Poison » Fri Mar 11, 2005 4:17 pm

have a look at this. I've found something about cancer in plants: (not about cancer caused by exposure to leaves but I thought that it may be useful...)

http://www.madsci.org/posts/archives/ma ... .Bt.r.html
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Postby mith » Fri Mar 11, 2005 10:14 pm

Good link but I felt the symptoms described don't seem very cancer like. I mean swelling? That sounds like the measles.
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Postby protozoan » Fri Mar 11, 2005 10:42 pm

Plants cannot have metastasis, cause theres not distribution system for cancerous cells like in animals (blooood). So i think theres less chance to develope so dangerous tumors. If any cancer finds on the leaf it is not so dangerous for plants, one leaf - no leaf. [/quote]
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Postby 2810712 » Sat Mar 12, 2005 2:18 pm

Ya, that's really important, protozoan
But, logically, light should cause cancer , and its not probably seen, so I am confused.

:?

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Postby adam00f » Wed May 18, 2005 2:49 am

But plants can get tumors when mitosis occures fast..correct me if im wrong...
Summer schedual/ gotta cram all chemo info and i have water polo practice 3 tiomes a day!!!!!!!..frick i nned some sleep!!
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Postby Poison » Wed May 18, 2005 5:08 pm

Yes, plants can have tumors. Tumors are results of uncontrolled divisions.
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apoptosis and cancer in plant

Postby mothorc » Sat May 28, 2005 4:01 am

*cancer in plant cause by Agrobacterium sp (tumer inducing and root inducing)
sometime it can cause by problem in phytohormone regulation
**i believe that plant have apoptosis, you can see orchids invitro can bloom into flower at the same time
or provine-trees can mature early than usual non province-tree (clearly in fruits) so it will dead earllier
But in vitro plant tissue always young together (have same old)
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