[article]
| Titre : |
Clonal architecture and internal isoenzymatic variability of the bryophyte Polytrichum commune hedw. during post‐fire regeneration |
| Type de document : |
texte imprimé |
| Auteurs : |
Pierre Corradini, Auteur ; M.-A. Esnault, Auteur ; Bernard Clément, Auteur |
| Année de publication : |
1999 |
| Article en page(s) : |
pp. 145-155 |
| Langues : |
Anglais (eng) |
| Catégories : |
[ZG] BRETAGNE (53)
[habitats/milieux] 3 - Landes, fruticées et prairies
[Thèmes] Bryophytes
|
| Mots-clés : |
après incendie croissance clonale colonisation |
| Résumé : |
"In the heathlands of Brittany, Polytrichum commune is a pioneer moss that becomes established after fires. Two approaches were used to follow clonal growth in a sample of 20 colonies. Four cohort stem ages were identified (1 to 4 years old). Stem density profiles for different stem cohorts across colonies showed a predominantly central cohort 1 stem density maximum (32% of all stems). Colonies expanded by adding new cohorts both over and beyond the area already occupied. A pair of distant stems was analysed for 7 isozyme systems. Twenty‐three banding patterns were determined. No one colony was variable for all systems. For the 20 colonies tested, 27 distinct phenotypes were identified. Banding patterns were similar for the paired stems analysed in 10 of the 20 colonies which expressed 7 of the 27 phenotypes. The 10 other colonies shared 20 phenotypes. Five colonies were selected for a detailed study. No colony was perfectly homogeneous. Four colonies were quite uniform and expressed a single phenotype. The fifth colony was variable for 5 of the 7 systems and could express more than one phenotype. Colony structure, with a high central stem density, probably reflects a clonal architecture. Only one colony had an internal genetic heterogeneity, indicating the possible coexistence of two genotypes in a single colony. The results do not allow any assessment of the correspondence between the physical and genetic structure of colonies." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Corradini P., Esnault M.-A., Clément B., 1999 - Clonal architecture and internal isoenzymatic variability of the bryophyte Polytrichum commune hedw. during post‐fire regeneration. Plant Biosystems, 133 (2) : 145-155. |
| ID PMB : |
71301 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71301 |
in Plant Biosystems > vol. 133, n°2 (Année 1999) . - pp. 145-155
[article]
|
Clonal architecture and internal isoenzymatic variability of the bryophyte Polytrichum commune hedw. during post‐fire regeneration in Plant Biosystems, vol. 133, n°2 (Année 1999)