Re: Parthenogenesis vs. cleistogamy
- To: perennials@mallorn.com
- Subject: Re: Parthenogenesis vs. cleistogamy
- From: "* L* P* <d*@olympus.net>
- Date: Mon, 07 Sep 1998 11:47:45 -0700
- References: <l03110705b219d5c08c6f@[169.207.80.211]>
Don Martinson wrote:
>
> >Several types of flowers can produce fruit without fertilization. Examples are
> >bananas,fuchsias, etc. Fuchsias will produce fruit when stressed as well as
> >lantana which will set excess fruit under cooler fall conditions.
> >
> >Al Krismer
>
> >Certain plants do this on a regular basis, such as (at some of) the Violas.
> >This is called cleistogamy (literally, "hidden sex"). It refers to
> >pollenation that occurs within an unexpanded flower.
> >
> >Don Martinson
>
> These are actually 2 different processes. Cleistogamy refers to
> fertilization which occurs in an unopened flower. Parthenogenesis refers
> to the development of the fruit/seed WITHOUT fertilization.
> I believe that parthenogenesis may more likely be the result of stress.
>
> I'm not sure which, if either, of these 2 events might explain the "seed
> without flower" observed in the lobelia, but either of these 2 terms are
> great for throwing out at the next boring party or the next time you play
> Scrabble.
>
> Don Martinson
> Milwaukee, Wisconsin
> d*@post.its.mcw.edu
>
> "Existing order thrives upon ignorance and lies.
> Objective truth and individual reason are feared above all."
>
> ---------------------------------------------------------------------
So, please explain the process of fig formation. No flower. At least a
banana forms a flower of sorts, eh?
--
The Greenhouse Nursery
81 S. Bagley Creek Road & Hwy 101
Port Angeles, WA 98362
(360) 417-2664
Zone 8
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