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Titolo:
Effect of branch position and light availability on shoot growth of understory sugar maple and yellow birch saplings
Autore:
Goulet, J; Messier, C; Nikinmaa, E;
Indirizzi:
Univ Quebec, Grp Rech Ecol Forestiere Interuniv, Montreal, PQ H3C 3P8, Canada Univ Quebec Montreal PQ Canada H3C 3P8 univ, Montreal, PQ H3C 3P8, Canada Univ Helsinki, Dept Forest Ecol, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ol, FIN-00014 Helsinki, Finland
Titolo Testata:
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
fascicolo: 8, volume: 78, anno: 2000,
pagine: 1077 - 1085
SICI:
0008-4026(200008)78:8<1077:EOBPAL>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
CROWN ARCHITECTURE; TREE ARCHITECTURE; PINUS-CONTORTA; ACER-SACCHARUM; FOLIAGE AREA; SAPWOOD AREA; SCOTS PINE; MODEL; CANOPY; FOREST;
Keywords:
shoot growth; branch position; light availability; branch mortality; sugar maple; yellow birch;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Messier, C Univ Quebec, Grp Rech Ecol Forestiere Interuniv, CP 8888,Succursale Ctrville, Montreal, PQ H3C 3P8, Canada Univ Quebec CP 8888,Succursale Ctrville Montreal PQ Canada H3C 3P8
Citazione:
J. Goulet et al., "Effect of branch position and light availability on shoot growth of understory sugar maple and yellow birch saplings", CAN J BOTAN, 78(8), 2000, pp. 1077-1085

Abstract

Phenotypic plasticity enables tree saplings to change their morphology according to their environment to grow toward a better light micro-habitat. Therefore, processes of crown development could be expected to vary as a function of light. The objectives of this study were to (i) evaluate the effects of position and light availability on shoot growth within the crowns of understory saplings of sugar maple (Acer saccharum Marsh.) and yellow birch (Betula alleghaniensis Britton.); (ii) develop a new vigour index for shoots; and (iii) evaluate the possible factors relating to branch mortality in the crown of sugar maple saplings. The results revealed that there is a clear branch position effect on shoot growth in the crown for yellow birch saplings and that it is partly related to the presence of two types of shoots. Dead branches were located at the bottom of the crown of sugar maple saplings; they were smaller in size, had wider angles and had lower indexes of vigour than live branches found nearby. Preliminary results obtained on the vigour index indicate that it is a potentially useful tool for predicting the growth and vigour status of a branch.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 09:52:58