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Fwd: Do You Have Molecular Estimates of Date of Divergence of Lycopodium and Selaginella?

  • Subject: [ferns] Fwd: Do You Have Molecular Estimates of Date of Divergence of Lycopodium and Selaginella?
  • From: Ross Koning <rkoning@snet.net>
  • Date: Mon, 13 Dec 2004 21:50:26 -0500

I'm forwarding this email on to the group for any who might be able
to answer these questions...molecular biology of Selaginella...
I wish I knew more myself!! If we have a lurking Selaginella person
here, I'd love to have you write to me (and John) too.

ross (list-dad)

Begin forwarded message:

> From: John Barrett <lactoris@yahoo.com>
> Date: December 13, 2004 6:30:11 PM EST
> To: rkoning@snet.net
> Subject: Do You Have Molecular Estimates of Date of Divergence of 
> Lycopodium and Selaginella?
>  rkoning@snet.net.
> Dr. Koning -
>    I was looking at some of your materials on vascular
> plants, particularly Selaginella, and I wonder if you might
> know of molecular estimates of the dates of divergence of
> living species of Lycopodium and Selaginella? Also the age
> of various species within these groups and Isoetes would be
> of interest also.
> I am fairly broadly interested in life sciences and
> paleobiology and recently in the origins of the bitgegmic
> ovule of angiosperms. If genes of the two layers showed
> homology to different structures of gymnosperms or non-seed
> plants, it might give clues to the evolutionary history. I
> see that cell adhesion molecules are important in the
> formation of pollen tube transmission tissue of flowering
> plants, but on the Internet I do not see that the possible
> role of adhesion molecules in forming the bitegmic ovule
> has been investigated.
> Around 1983 to 1996 I had much contact with botanists at
> Harvard and in New England Botanical CLub, but currently I
> am in Forks Washington [300 Evergreen Loop Forks WA
> 98331-9680]. A couple of years ago I heard considerable
> discussion of lycopods, selaginella, ferns, and bryophytes
> with Edward Tisch of Peninsula College in Port Angeles. I
> also do a good deal on algae.
> Best wishes - John B. Barrett
> =====
> See website http://ccilink.com/barrett with Barrett family memoir of 
> Navy life WW1-2 "RED HEADED STEPCHILD" principal author Sophie 
> Meranski Barrett 1901-87 in collaboration with John Barrett jr.also 
> family history,travel materials on  Coast Guard Academy,Mount 
> Holyoke,Harvard & Gallaudet Colleges,Roxbury Latin, Pi Eta club,& 
> writing on
> science,human rights by- John Berchmans Barrett jr
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com

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