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Titolo:
Leaf morphology and photosynthetic adjustments among deciduous broad-leaved trees within the vertical canopy profile
Autore:
Koike, T; Kitao, M; Maruyama, Y; Mori, S; Lei, TT;
Indirizzi:
Hokkaido Univ Forests, Sapporo, Hokkaido 0600809, Japan Hokkaido Univ Forests Sapporo Hokkaido Japan 0600809 kaido 0600809, Japan FFPRI, Sapporo, Hokkaido 0628516, Japan FFPRI Sapporo Hokkaido Japan 0628516 RI, Sapporo, Hokkaido 0628516, Japan FFPRI, Morioka, Iwate 0200123, Japan FFPRI Morioka Iwate Japan 0200123FFPRI, Morioka, Iwate 0200123, Japan
Titolo Testata:
TREE PHYSIOLOGY
fascicolo: 12-13, volume: 21, anno: 2001,
pagine: 951 - 958
SICI:
0829-318X(200108)21:12-13<951:LMAPAA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHADE TOLERANCE; JAPANESE FOREST; WOODY-PLANTS; LIGHT; NITROGEN; ACCLIMATION; PATTERNS; TRAITS; FIELD; OAK;
Keywords:
carbon dioxide concentration gradient; chlorophyll; light gradient; nitrogen distribution; photosynthetic acclimation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Koike, T Hokkaido Univ Forests, Sapporo, Hokkaido 0600809, Japan Hokkaido Univ Forests Sapporo Hokkaido Japan 0600809 0809, Japan
Citazione:
T. Koike et al., "Leaf morphology and photosynthetic adjustments among deciduous broad-leaved trees within the vertical canopy profile", TREE PHYSL, 21(12-13), 2001, pp. 951-958

Abstract

Photosynthetic acclimation of deciduous broadleaved tree species was studied along a vertical gradient within the canopy of a multi-species deciduousforest in northern Japan. We investigated variations in (1) local light regime and CO2 concentration ([CO2]), and (2) morphological (area, thickness and area per mass), biochemical (nitrogen and chlorophyll concentrations) and physiological (light-saturated photosynthetic rate) attributes of leavesof seven major species on three occasions (June, August and October). We studied early successional species, alder (Alnus hirsuta (Spach) Rupr.) and birch (Betula platyphylla var. japonica (Miq. ) Hara); gap phase species, walnut (Juglans ailanthifolia Carriere) and ash (Fraxinus mandshurica var. japonica Rupr.); mid-successional species, basswood (Tilia japonica (Miq. ) Simonk.) and elm (Ulmus davidiana var. japonica (Rehd. ) Nakai); and the late-successional species, maple (Acer mono Bunge). All but maple initiated leafunfolding from the lower part of the crown. The [CO2] within the vertical profile ranged from 320-350 ppm in the upper canopy to 405-560 ppm near theground. The lowest and highest ambient [CO2] occured during the day and during the night, respectively. This trend was observed consistently during the summer, but not when trees were leafless. Chlorophyll concentration was positively related to maximum photosynthetic rate within, but not among, species. Leaf senescence started from the inner part of the crown in alder and birch, but started either in the outer or top portion of the canopy of ash, basswood and maple. Chlorophyll (Chl) to nitrogen ratio in leaves increased with decreasing photon flux density. However, Chl b concentration in all species remained stable until the beginning of leaf senescence. Maximum photosynthetic rates observed in sun leaves of early successional species, gap phase or mid-successional species, and late successional species were 12.5-14.8 mu mol m-(2) s(-1), 4.1-7.8 mu mol m(-2) s(-1) and 3.1 mu mol m(-2)s(-1), respectively.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 22:55:33