[pbs] Fragrance
Nolo Contendre
miaam at ars-grin.gov
Wed Apr 14 12:43:45 EDT 2004
"The colonies in North Africa were of the type that allowed
the gene to surface and were thus fragrant. "
John - this still isn't a reason to counter pollinator selection pressure in
North Africa for fragrance. Or do you not believe in natural selection?
Alan Meerow
----- Original Message -----
From: "John Bryan" <johnbryan at worldnet.att.net>
To: <pbs at lists.ibiblio.org>
Sent: Wednesday, April 14, 2004 12:47 PM
Subject: [pbs] Fragrance
> Dear All;
>
> Mary Sue posed a question regarding fragrance in some plants in the same
> species having fragrance and others of the same species not having any
> fragrance.
>
> I do not think this has anything to do with pollinators, rather
> geographic variation. I remember discussing this with Professor
> Doorenbos in Wagening, The Netherlands, back in 1956, when I was living
> and studying in The Netherlands. He told me that Cyclamen hederifolium
> from North Africa had a distinct fragrance, while others from other
> regions of the Mediterranean did not. His opinion was that the gene
> carrying the fragrance character was present in all of the species but
> recessive. The colonies in North Africa were of the type that allowed
> the gene to surface and were thus fragrant. No doubt other colonies with
> fragrant flowers were to be found in isolated pockets within the natural
> range of the plants, but all from North Africa were fragrant. This seems
> to me to be a logical reason. If it were due to pollinators the
> variations and ability to adapt to a particular habitat would mean that
> even greater variances in fragrance would be apparent. Cheers, John E.
> Bryan
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