Re: AG Stigmas
- Subject: Re: AG Stigmas
- From: J* L* J*
- Date: Sat, 24 Jul 1999 23:18:13 EDT
On Fri, 23 Jul 1999 11:11:44 -0700 "Harold Eddleman Ph.D"
<indbio@disknet.com> writes:
>Today I pollinated my first 3 AG females.
> In corn, you must have a sucessful pollen grain on each of the 300
>silks of one ear. Same is true for each of the many sigmas in a
>strawberry or Rubus flower, sunflower, etc.
> I realize I do not know the situation for Cucurbit. I realize that
>if
>no pollen gets onto a segment of an AG stigma there will be no seeds
>in
>that carpel (as in a slice of an orange or apple). In lillies, apples
>and other fruits having 3 to 5 carpels, the fused stigmas make a tiny
>structure and you can easily get every section of the stimga
>pollinated.
>WHAT ABOUT AG
> Will there be unfertilized Ovules (eggs) unless I get pollen on the
>bottom of the sigma? Is the stigma analagous to the fused 300 silks of
>a
>corn ear so that a sucessful pollen grain must germinate on each tiny
>area serving an ovule?
I have not seen this to be the case. The eggs and pollen must somehow
have a common area/connection that allows pollen to go where it needs to.
Obviosly lobes are sepparate. But is there greater differentiation? A
simple test would be to take a pumpkin and only touch the very top of the
stigma with a lot of pollen and see what happens at the end of the
season. If you have a misshapen pumpkin with a lot of unpollinated seeds
at one end, then you have your answer. I am believing, however that you
will still get complete polination.
Jon in UT
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