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Post by Apoplast on Jun 11, 2013 1:45:56 GMT
Hi LeeB - Thanks for the leg work on that. At your prodding (and that of others'), I have Taylor's monograph on it's way. I had only heard of species in section utricularia forming turions, and so far that looks supported. I think I am going to have to head out this autumn and see what U. purpurea is up to. It'll take a bit more effort to check out what U. resupinata is doing at some point, but that might be worth it. I guess U. cornuta could be an easier target as a terrestrial. Unless this is all outlined in Taylor's book that is.
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leeb
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Post by leeb on Jun 11, 2013 4:04:14 GMT
I suspect Taylor's monograph is going to say lots on these plants and the inter-relationships of the aquatic species. I would like to see a DNA phylogeny including a lot or most of the aquatic Utricularia; it would be interesting to see if the species with turions or those with radial floats form natural groups, and where different subgroups of species are likely to have evolved and also which species are of hybrid origin and what their parent species are. I expect there are lots of interesting things going on in the evolution of this group. An estimate of the age of the group and how quickly it diversified would be good too.
LeeB.
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Post by Apoplast on Jun 12, 2013 3:34:03 GMT
Hi LeeB - Well I'll let you know what Taylor has to say on the subject. I agree a molecular phylogeny would be the way to go! That's the best way to form hypotheses for these sorts of things, and I love to see them because good ones make me feel so much more informed about the structure and history of the group.
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Post by ICPS-bob on Jun 12, 2013 23:08:12 GMT
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leeb
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Post by leeb on Jun 13, 2013 4:26:32 GMT
Thanks for the links to the papers; the author seems to have done quite a lot of research on turions, I came across other papers by him. When I was looking for information on turions I checked the online Flora of China which used the presence of turions as one of the features in the identification key to the species; perhaps the key in Taylor's monograph may also mention them.
LeeB.
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Post by adamcross on Jun 13, 2013 4:36:41 GMT
LeeB- I would consider Lubomir to be one of the current world experts in the ecophysiology of hibernacula, particularly in relation to Utricularia. He's a great scientist and has always been both friendly and approachable in my experience- I'd consider getting in touch with him if you have any specific questions.
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Post by Apoplast on Jun 15, 2013 3:00:50 GMT
Hi LeeB - Well, Taylor's monograph arrived today. I haven't had a chance to look at it in detail, but in the section describing turions generally he suggests that only aquatic species in the section utricularia form turions, but then goes on to say that U. purpurea's turions aren't well formed. So, I'm not entirely sure yet. He does say that turions are rarely on herbarium specimens and so it doesn't sound like he'll be using them much. But, more to come in a few days once I've had a change to do a bit more reading. One thing I can say, it looks like a great book!
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Post by adamcross on Jun 21, 2013 1:53:37 GMT
Hi LeeB,
I have been told that U. macrorhiza, U. minor and U. intermedia all form turions.
Adam
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