protecting from self-fertilization

[zami'87.]

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.

[mith]

I think they do self-pollinate...

[zami'87.]

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

[iri_black]

That's very interesting....I din't know that

[fabienne]

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

[zami'87.]

thanks soooo much fabienne! 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.
Thanks people!

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

[mothorc]

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)