Comparison of diurnal patterns of leaf conductance and photosynthetic capacity in the leaves of seedlings of three species

Title:

Comparison of diurnal patterns of leaf conductance and photosynthetic capacity in the leaves of seedlings of three species

Creator:

Liang, N. and Maruyama, K.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:10a244e3-89d7-4525-8673-4f3102bffcc5
uuid:10a244e3-89d7-4525-8673-4f3102bffcc5
urnnbn:urn:nbn:cz:aba007-000fjf

Type:

model:internalpart and TEXT

Format:

print

Description:

Diurial variations in leaf conductance for water vapour (g^), and in rates of net photosynthesis (P^) transpiration (P) were investigated for individual Fagus crenata, Ginkgo biloba and Alnus firma trees during the growing season (May 12, June 3, August 19 and October 22, 1992), to defme the effects of main climatic factors limiting the photosynthetíc capacity of leaves. Measurements were undertaken at 1 h intervals in fully expanded leaves from 04.00 to 20.00 under sunny day and favourable water supply. Diumal patterns of gg and P^ in F. crenata were similar to G. biloba, showing strong dependence on irradiance in the early moraing and early evening, in May, June and August. The maximum values of P^, gg and water-use eíTiciency (WLIE) were recorded at 07.00 to 08.00 when photosynthetícally active radiation (PAR) and leaf temperature (Zj) were approximately 1200 pmol m'^ s"' and below 25 °C, respectively. P^, gg and WUE decreased from 08.00 to 13.00 contínuously, followed by a slight recovery at about 17.00 and a steep dechne until darkness. A. firma remained at maximum P^ from 07.00 to 14.00, and P^, gg and E were much higher than for the other two species. The peak of E in all three species always occurred at midday, coincident with maximum PAR and highest Ty But in October, P^ and E in all three species were highest around noon, also parallel to the maximum PAR and Ty

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

25-34 and 27-36

Source:

Photosynthetica | 1994 Volume:30 | Number:1

Harvested from:

CDK

Metadata only:

false