Change search
ReferencesLink to record
Permanent link

Direct link
Photosynthetic responses to short-term and long-term light variation in Pinus sylvestris and Salix dasyclados
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre.
2004 (English)In: Trees, ISSN 0931-1890, Vol. 18, 622-629 p.Article in journal (Refereed) Published
Abstract [en]

Trees-Structure and Function: 2004 18:622-629 Pinus sylvestris and Salix dasyclados, which differ in leaf longevity, were compared with respect to four aspects of photosynthetic light use and response: high light acclimation, photoinhibition resistance and recovery, lightfleck exposure and use and chloroplast acclimation across leaves. The first two aspects were examined using seedlings under controlled conditions and the other two were tested using trees in the field. When exposed to high light, shade leaves of Pinus acclimated completely, achieving the same photosynthetic capacities as sun leaves, whereas shade leaves of Salix did not reach sun leaf capacities although the absolute magnitude of their acclimation was larger. Shade leaves of Pinus were also more resistant to photoinhibition than those of Salix. Much of the direct light supplied within the canopy was in the form of rapid fluctuations, lightflecks, for Pinus and Salix alike. They exploited short lightflecks with similar efficiency. The greater proportion of diffuse light in the canopy for Pinus than Salix seems to lead to a lesser degree of differential intra-leaf acclimation of chloroplasts, in turn leading to lower efficiency of photosynthesis under unilateral light as reflected by a lower convexity, rate of bending, of the light-response curve. The differences in light use and responses are discussed in relation to possible differences in characteristics of the long and short-lived leaf.

Place, publisher, year, edition, pages
2004. Vol. 18, 622-629 p.
URN: urn:nbn:se:umu:diva-24795DOI: 10.1007/s00468-004-0329-8OAI: diva2:227524
Available from: 2009-07-15 Created: 2009-07-15

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
Umeå Plant Science Centre
In the same journal

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 24 hits
ReferencesLink to record
Permanent link

Direct link