hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
 Navigation
Articles
Gallery of Plants
Blog
Tech Blog
Plant Profiles
Patents
Mailing Lists
    FAQ
    Netiquette
    Search ALL lists
    Search help
    Subscription info
Top Stories
Links
sHORTurl service
Tom Clothier's Archive
 Top Stories
Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

Unauthorized use of a plant doesn't invalidate it's patent

RSS story archive

Re: HYB:double fertilization

  • Subject: Re: [iris-talk]HYB:double fertilization
  • From: "pinkirises" <pbrooks@whidbey.net>
  • Date: Fri, 24 May 2002 03:26:58 -0000

Cool!  Thanks, Bill.

Patricia



--- In iris-talk@y..., Bill Shear <wshear@e...> wrote:
> Double fertilization refers to the process that takes place in 
every seed
> plant.  Each pollen grain contains 2 sperm nuclei.  One of them 
fertilizes
> the egg nucleus, which produces the embryo plant.   The other fuses 
with two
> additional nuclei in the ovule to produce the endosperm tissue, 
which stores
> food in the seed (yes, the endosperm tissue is thereby triploid!).
> 
> If mixed pollen is applied to a stigma, it is possible for the 
seeds in the
> resulting pod to have different pollen parents.  Each ovule 
fertilization
> event is separate.  That means there has to be at least one pollen 
grain for
> each seed produced; no more than single ovule can be fertilized by 
a single
> pollen grain.
> 
> Bill Shear
> Department of Biology
> Hampden-Sydney College
> Hampden-Sydney VA 23943
> (434)223-6172
> FAX (434)223-6374
> email<wshear@e...>
> Moderating e-lists:
> Coleus at http://groups.yahoo.com/group/coleus
> Opiliones at http://groups.yahoo.com/group/opiliones
> Myriapod at http://groups.yahoo.com/group/myriapod
> MilliPEET website at
> 
http://www.fmnh.org/research_collections/zoology/zoo_sites/millipeet/h
ome.ht
> ml
> SHAPE OF LIFE website at
> http://www.pbs.org/kcet/shapeoflife/episodes/conq_explo1.html
> 
> "The old naturalists were so sensitive and sympathetic to nature 
that they
> could be surprised by the ordinary events of life.  It was an 
incessant
> miracle to them, and therefore gorgons and flying dragons were not
> incredible to them.  The greatests and saddest defect is not 
credulity, but
> our habitual forgetfulness that our science is ignorance."
> Henry David Thoreau, Journals, March 5, 1860.


------------------------ Yahoo! Groups Sponsor ---------------------~-->
FREE COLLEGE MONEY
CLICK HERE to search
600,000 scholarships!
http://us.click.yahoo.com/DlIU9C/4m7CAA/Ey.GAA/2gGylB/TM
---------------------------------------------------------------------~->

 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ 






 © 1995-2015 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index