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Do Plants have Immunity?

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Dominiquest
India

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Topic Started by Dominiquest
on 10/9/2008 20:51 PM   
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I wanted to know.... Is there any kind of immune system in plants? The question propped up some days ago during a discussion and I've been thinking but I can't seem to find an answer... Do you know anything about this?

Dominique Frances Hoover


Last edited Aug 07, 2009, 13:57 PM by heehawmcduff
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Posted By sharmakaushikp
on 10/10/2008 7:46 AM   
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I would suggest you to take a look at the following links.

http://www.newton.dep.anl.gov/newton/askasci/1993/biology/bio035.htm

http://www.sciencedaily.com/releases/2003/12/031209080025.htm



Attached file: UNDERSTANDING THE FUNCTIONS OF PLANT DISEASE RESISTANCE PROTEINS.pdf (0 downloads, 362KB)

Attached file: 8849.full.pdf (0 downloads, 193KB)

Attached file: RECOGNITION AND RESPONSE IN THE PLANT IMMUNE SYSTEM.pdf (0 downloads, 396KB)


varsha
United States


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Posted By varsha
on 10/10/2008 14:23 PM   
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said:


Plants immunity research and dates back many decades. Plants donot have an adptive immune system- antibodies and T cell responses in higher mammals- but they have an innate defense mechanism which could also be inducible.
Like animals, plants can recognize PAMPs (pathogen associated molecular pattern) using PRRs (pattern recognition receptors). plant PRRs are similar to Toll like receptors in having a LRR (leu rich repeat) and TIR (toll Interleukin-1) domains. Plants also produce antimicrobial factors, pathogenesis related (PR) proteins being one of the well studied ones.
You can visit some of the labs working on plant immune response for more info:
//ausubellab.mgh.harvard.edu/]Ausubel lab
Dangl Lab at UNC



Dominiquest
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Posted By Dominiquest
on 10/27/2008 19:30 PM   
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but then why do plants get affected so easily when there is a fungus or some other form of infectious agent? Take the roots for example... when there is a fungal infection the mycelium penetrates the roots and infects the plant once it reaches the xylem, but the plant doesn't protect itself against this or fights against the infection... it always needs some kind of added treatment like fungicides...

Dominique Frances Hoover


Last edited Oct 27, 2008, 21:31 PM by Dominiquest

canscientist
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Posted By canscientist
on 11/20/2008 23:41 PM   
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All the living organisms have immunity.... In plants the main protective mechanism is by heat stress proteins...

M.MUTHUMARIAPPAN



varsha
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Posted By varsha
on 11/25/2008 19:46 PM   
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Dominiquest said:
but then why do plants get affected so easily when there is a fungus or some other form of infectious agent? Take the roots for example... when there is a fungal infection the mycelium penetrates the roots and infects the plant once it reaches the xylem, but the plant doesn't protect itself against this or fights against the infection... it always needs some kind of added treatment like fungicides...


Plants do have immune responses against fungal pathogens. In fact. pathogenic fungi have mechanisma to suppress plant immune response (analogous to e.g viral suppression of immunity in mammals).
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2330162

As with animals, plant immunity is not absolute. The same way you can get an upper respiratory tract infection or tuberculosis (your immune system may clear URT infection on its own but may need an antibiotic regimen for TB esp if immunocompromised), plants can get fungal infections but may or may not be able to clear them. Nutrition, humildity etc play a part in outcome of infection.

A basic Immunology book from the college library may be a good place to start. and then some reviews.



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