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Titolo:
Facilitation of seedling establishment: Reduction in irradiance enhances winter growth of Eucalyptus pauciflora
Autore:
Egerton, JJG; Banks, JCG; Gibson, A; Cunningham, RB; Ball, MC;
Indirizzi:
Australian Natl Univ, Sch Biol Sci, Inst Adv Studies, Ecosyst Dynam Grp, Canberra, ACT 0200, Australia Australian Natl Univ Canberra ACT Australia 0200 rra, ACT 0200, Australia Australian Natl Univ, The Faculties, Dept Forestry, Canberra, ACT 0200, Australia Australian Natl Univ Canberra ACT Australia 0200 rra, ACT 0200, Australia Australian Natl Univ, Grad Sch, Stat Consulting Unit, Canberra, ACT 0200, Australia Australian Natl Univ Canberra ACT Australia 0200 rra, ACT 0200, Australia
Titolo Testata:
ECOLOGY
fascicolo: 5, volume: 81, anno: 2000,
pagine: 1437 - 1449
SICI:
0012-9658(200005)81:5<1437:FOSERI>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
COLD-INDUCED PHOTOINHIBITION; SNOW GUM; PHOTOSYSTEM-II; FROST-RESISTANCE; SOUTHEASTERN AUSTRALIA; QUERCUS-DOUGLASII; PLANT-COMMUNITIES; SEASONAL-CHANGES; PHOTOSYNTHESIS; COMPETITION;
Keywords:
chlorophyll fluorescence; Eucalyptus pauciflora; facilitation of seedling establishment; frost effects; light regimes; microclimate; nurse plants; photoinhibition; cold-induced; plant growth, low temperature and irradiance; seedling growth and light regimes; snow gum;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
73
Recensione:
Indirizzi per estratti:
Indirizzo: Egerton, JJG Australian Natl Univ, Sch Biol Sci, Inst Adv Studies, EcosystDynam Grp, Canberra, ACT 0200, Australia Australian Natl Univ Canberra ACT Australia 0200 , Australia
Citazione:
J.J.G. Egerton et al., "Facilitation of seedling establishment: Reduction in irradiance enhances winter growth of Eucalyptus pauciflora", ECOLOGY, 81(5), 2000, pp. 1437-1449

Abstract

We determined whether plants benefit from a reduction in irradiance when growth is limited by low temperatures. Growth of snow gum (Eucalyptus pauciflora Sieb, ex Spreng,) seedlings was studied in response to two irradiance regimes (100% and 50% sunlight) under field conditions during autumn and winter. Seedlings were planted on north (exposed) and south (sheltered) sidesof vertical screens transmitting 50% incident sunlight. This planting arrangement allowed assessment of affects of excess irradiance on growth of seedlings subject to common temperature minima, Over winter, sheltered seedlings were less photoinhibited, had higher photosynthetic CO, assimilation rates, lost less leaf area, and maintained a higher leaf-area ratio than exposed seedlings. These differences were consistent with greater growth of sheltered than exposed seedlings by the end of winter. These results show that shading may contribute to facilitation of regeneration by nurse plants in frost-prone environments.

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Documento generato il 06/04/20 alle ore 02:06:21