A morphological, anatomical and isozyme study of Potamogeton ×schreberi: confirmation of its recent occurrence in Germany and first documented record in France

Title:

A morphological, anatomical and isozyme study of Potamogeton ×schreberi: confirmation of its recent occurrence in Germany and first documented record in France
Morfologie, anatomie lodyhy a isozymová spektra u Potamogeton ×schreberi: potvrzení současného výskytu v Německu a první údaj pro Francii

Creator:

Kaplan , Zdeněk and Wolff , Peter

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:5ab462c8-d05f-4070-a03d-451e93b64dd6
uuid:5ab462c8-d05f-4070-a03d-451e93b64dd6

Subject:

anatomy, clone, dispersal, distribution, electrophoresis, France, Germany, hybridization, isozymes, morphology, Potamogeton, relic, taxonomy, and vegetative propagation

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

A combined study of morphology, stem anatomy and isozyme patterns was used to reveal the identity of sterile plants from two rivers on the Germany/France border. A detailed morphological examination proved that the putative hybrid is clearly intermediate between Potamogeton natans and P. nodosus. The stem anatomy had characteristics of both species. The most compelling evidence came from the isozyme analysis. The additive “hybrid” banding patterns of the six enzyme systems studied indicate inheritance from P. natans and P. nodosus. In contrast, other morphologically similar hybrids were excluded: P. ×gessnacensis (= P. natans × P. polygonifolius) by all the enzyme systems, P. ×fluitans (= P. lucens × P. natans) by AAT, EST and 6PGDH, and P. ×sparganiifolius (= P. gramineus × P. natans) by AAT and EST. All samples of P. ×schreberi are of a single multi-enzyme phenotype, suggesting that they resulted from a single hybridization event and that the present-day distribution of P. ×schreberi along the Saarland/Moselle border was achieved by means of vegetative propagation and long-distance dispersal. Neither of its parental species occur with P. ×schreberi or are present upstream, which suggests that this hybrid has persisted vegetatively for a long time in the absence of its parents. The total distribution of this hybrid is reviewed and a detailed account of the records from Germany is given. P. ×schreberi appears to be a rare hybrid. The risk of incorrect determination resulting from the identification of insufficiently developed or inadequately preserved plant material is discussed.

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

141-161

Source:

Preslia | 2004 Volume:76 | Number:2

Harvested from:

CDK

Metadata only:

false