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

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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