Date: Wed, 9 Aug 2000 08:41:37 -0700 From: "Doug Burdic" <dburdic@harborside.com> To: cp@opus.hpl.hp.com Message-Id: <aabcdefg2408$foo@default> Subject: Re: Nepenthes seed
Hi Danny and All,
> Some plants produce seeds without pollination.
> This phenomenon is called apomixis.
Formerly called 'Parthenogenesis' or 'Parthenocarpy', or
have they changed the terminology on me once again since
my days at the university? ;) They do this a lot I've noticed
over the decades.
Best Wishes,
Doug
Doug Burdic
dburdic@harborside.com
----- Original Message -----
To: Multiple recipients of list <cp@opus.labs.agilent.com>
Sent: Tuesday, August 08, 2000 11:41 PM
> Some plants produce seeds without pollination.
> This phenomenon is called apomixis.
> A simple experiment may indicate whether some Nepenthes
> species are apomictic: cut off the stigma of a young (female)
> Nepenthes flower, and follow the development of a fruit (if any). Seed
> development inside the ovarium (=fruit) will clearly
> indicate apomixis. Another test for apomictic seed development
> is counting the pollen tubes in the style of a mature fruit. When
apomixis
> exists,
> there are less tubes than seeds, but this test cannot be done without
> a microscope and facilities for pollen-tube staining.
> Kind regards,
> Danny
> _______________________________________
> Dr. Daniel M. Joel
> Newe-Ya'ar Research Center
> P.O. Box 1021
> 30095 Ramat-Yishay, Israel
> Email: dmjoel@netvision.net.il
> office: +972 4 9539 529
> fax: +972 4 9836 936
> http://www.agri.gov.il/People/DanielMJoel.html
> _______________________________________
>
> >
> > Date: Mon, 7 Aug 2000 23:45:16 -0400
> > From: "Michael Hunt" <stovehouse@earthlink.net>
> > To: <cp@opus.labs.agilent.com>
> > Subject: Re: Nepenthes seed
> > Message-ID: <000801c000eb$1877e8c0$b650bfa8@oemcomputer>
> >
> > This is a very interesting topic. I have very few female Nepenthes.
This
> > spring a large N. alata did bloom. I left the spent inflorescence
on the
> > plant. I did not pollinate it, and had no other male Nepenthes
blooming
> at
> > the time. The capsules grew and swelled. They did burst open with
what
> > looks to me like normal Nepenthes seed. But how can this be? Do
> Nepenthes
> > waste energy developing sterile seed?
> > I can add that this plant is located out doors year round. But I
> personally
> > know of no other cp growers very close. I am very close to the Gulf
of
> > Mexico and surrounded by Tampa Bay. The seed went everywhere. I
have sown
> > it, but I really expect nothing to happen.
> > Any comments?
> >
> > ~ Mike
> > St. Petersburg Fl
> >
> >
> > ----- Original Message -----
> > From: "Greg Bourke" <sydneycarnivorous@hotmail.com>
> > Sent: Monday, August 07, 2000 6:27 AM
> > >
> > > I've had a Nepenthes set viable seed where the nearest known Nep
of the
> > > opposite sex in flower at that time was at a friends house over
2km
> away.
> > I
> > > don't live anywhere near the Nep's natural habitat either. I'm not
sure
> > who
> > > the pollinator was but I suspect a small native bee which lives
here in
> > > Sydney. I don't know the extent of the bee's range, I guess it
just got
> > > lucky.
> > ------------------------------
>
>
>
>
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