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Pollination GO:0009856

Pankaj Jaiswal pj37 at cornell.edu
Thu Jun 13 10:16:36 PDT 2002



I have some comments about the term "pollination ; GO:0009856"

   %pollination ; GO:0009856
    %compatible pollen-pistil interaction ; GO:0009858 % pollen-pistil
interaction ; GO:0009875
     <pollen adhesion ; GO:0009876
     <pollen recognition ; GO:0009857 < gametophytic self-incompatibility ;
GO:0009872 < sporophytic self-incompatibility ; GO:0009874
     <pollen tube adhesion ; GO:0009865
    <pollen germination ; GO:0009846 % germination ; GO:0009844
    <pollen hydration ; GO:0009859
    <pollen tube growth ; GO:0009860

term: pollination
goid: GO:0009856
definition: Pollination involves interactions between the female tissues
(stigma, style and ovary) and the male gametophyte or the pollen tube cell,
which contains the sperm cells.
definition_reference: PMID:10973091

However by definition it should be:
 
Pollination is the process of moving the pollen grain from the anther of a
stamen to the stigma of a carpel in angiosperms.

There are several instances of pollination types
Pollination
 self-pollination
 vector mediated pollination
  air
  animal
  insect

Also the process of pollination is not a biological process, in a way that once
the pollen is formed or reached a maturity, there is no biological activity
until the pollen reaches the stigma of a carpel. If GO has  pollination as
instance of biological processes (by True path rule) then insect pollination,
arial/wind pollination,  pollination by animals etc. are also biological
processes, which is not true. 

This is a mere chance that the animal goes to a flower for feeding (attracted by
color or nectar of a flower) and while returning the anthers get dehisced
(release of turgor pressure) due to movement of an insect (animal). One big
example is . In the wind pollinations this turgor is released by high wind
velocity. So releasing of turgor is a physiological process. Building up of
turgor is passively contributed by movement of water. Therefore I consider
pollination as a process independent of biological activity. It is merely a
process of carrying pollen from anther to the stigma of a carpel. In self
fertilized flowers it is a structural modifications that occur in a flower by
positioning the stigma and anthers at a  convenient locations.

The definition mentioned in the GO for pollination (virtually coming from
http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10973091&dopt=Abstract)
is incorrect. 

Also
    %compatible pollen-pistil interaction ; GO:0009858 % pollen-pistil
interaction ; GO:0009875
     <pollen adhesion ; GO:0009876
     <pollen recognition ; GO:0009857 < gametophytic self-incompatibility ;
GO:0009872 < sporophytic self-incompatibility ; GO:0009874
     <pollen tube adhesion ; GO:0009865
    <pollen germination ; GO:0009846 % germination ; GO:0009844
    <pollen hydration ; GO:0009859
    <pollen tube growth ; GO:0009860

These terms are part of/instances of post-pollination or pre-fertilization
events and not ISA/Partof of Pollination.

If everyone agrees then this term Pollination and its children needs revision 

Looking for your feedback

Pankaj

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