protecting from self-fertilization

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zami'87.
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protecting from self-fertilization

Post by zami'87. » Fri Aug 05, 2005 8:53 pm

hi! Could someone explain me mechanism of protecting from self-fertilization. What gene(s) controls it? Where this phenomenon is/is not present?
understand that diversity depends on it...
Thanks in advance. :)
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mith
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Post by mith » Sat Aug 06, 2005 5:25 am

I think they do self-pollinate...
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zami'87.
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Post by zami'87. » Sat Aug 06, 2005 12:04 pm

mithrilhack wrote:I think they do self-pollinate...

well what about this :? Nasrallah determined in earlier studies that in Brassicas (or cole crop plants), and related
plants in the mustard family, self-incompatibility relies on an interaction between a small
molecule, or ligand, on the coat of the pollen grain and a receptor kinase that spans the cell membrane on the surface of the stigma. When pollen from a particular strain lands on a
stigma of a flower from the same strain, the ligand and receptor bind on the stigma surface.
As a result, the receptor is activated and the pollen grain is unable to germinate and produce a
tube that would otherwise penetrate the cell wall.

from http://www.tc.cornell.edu/nr/shared/ctc ... occoli.pdf
ps need more information about this phenomenon and where it is/is not present... and MOLECULAR BASIS
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iri_black
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Post by iri_black » Mon Aug 08, 2005 5:14 am

That's very interesting....I din't know that :?
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sporophytic and gametophytic incompatibility

Post by fabienne » Mon Aug 08, 2005 3:05 pm

there is 2 way for plant to prevent from self-pollinisation: sporophytic and gametophytic incompatibility

maybe this link could help you...
http://www.sccs.swarthmore.edu/users/00 ... d/sVg.html

good luck

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zami'87.
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Re: sporophytic and gametophytic incompatibility

Post by zami'87. » Mon Aug 08, 2005 8:26 pm

thanks soooo much fabienne! :D :D :D It's brief but good for start. I'll try to find more...
If anyone find some interesting sites about this please let me know. :D
Thanks people!

this one is good http://users.rcn.com/jkimball.ma.ultran ... bilty.html

8)
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Post by mothorc » Tue Aug 09, 2005 1:45 am

I think zami's explanation is not exactly with male sterile cytoplasm.
It is a mechanism to "anti-self-fertize"(self-incompatibility)
One of the male sterile cytoplasm gene's name is ms gene.(it also depend on the biochemical cycle it effect)

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