Diurnal changes of gas exchange, chlorophyll fluorescence, and stomatal aperture of hybrid poplar clones subjected to midday light stress

Title:

Diurnal changes of gas exchange, chlorophyll fluorescence, and stomatal aperture of hybrid poplar clones subjected to midday light stress

Creator:

Zhang, Shouren and Gao, Rongfu

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:dbed998a-734b-4fe7-86b9-e4c4147e48d8
uuid:dbed998a-734b-4fe7-86b9-e4c4147e48d8
issn:0300-3604
doi:10.1023/A:1007119524389

Subject:

intercelullar CO2 concentration, irradiance, net photosynthetic rate, Populus, and stomatal aperture

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Diurnal changes in net photosynthetic rate (PN), chlorophyll (Chl) fluorescence, and stomatal aperture of several hybrid poplar clones subjected to midday light stress were measured in July and August of 1996. Midday depression of PN, photosystem 2 (PS2) efficiency, stomatal conductance (gs), and stomatal aperture was observed in all clones, though at differing rates among them. Non-uniform stomatal closure occurred at noon and at other times, requiring a modification of intercellular CO2 concentration (C1). A linear relationship was found between gs and stomatal aperture. More than half of the photons absorbed by PS2 centre dissipated thermally when subjected to light stress at noon. There was a linear relationship between the rate of PS2 photochemical electron transport (PxPFD) and PN. There was a consensus for two fluorescence indicators (1 - qP/qN and (Fm' - F)/Fm') in assessment of susceptibility of photoinhibition in the clones. According to PN, Chl fluorescence, and stomatal aperture, we conclude that midday depression of photosynthesis can be attributed to both stomatal and non-stomatal limitations. and Shouren Zhang, Rongfu Gao.

Language:

Multiple languages

Rights:

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

Coverage:

559-571

Source:

Photosynthetica | 1999 Volume:37 | Number:4

Harvested from:

CDK

Metadata only:

false