Responses in the physiology and biochemistry of Korean pine (Pinus koraiensis) under supplementary UV-B radiation

Title:

Responses in the physiology and biochemistry of Korean pine (Pinus koraiensis) under supplementary UV-B radiation

Creator:

Zu, Y. G., Wei, X. X., Yu, J. H., Li, D. W., Pang, H. H., and Tong, L.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:792062f8-6614-461f-bde8-2c197489a2e1
uuid:792062f8-6614-461f-bde8-2c197489a2e1
issn:0300-3604
doi:10.1007/s11099-011-0057-4

Subject:

botanika, botany, epicuticular wax, Korean pine, photosynthesis, and UV-B radiation

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The effect of supplementary UV-B radiation on Korean pine (Pinus koraiensis Sieb. et Zucc) was investigated. Compared with the control, the T1, T2, and T3 UV-B treatments increased by 1.40, 2.81, and 4.22 kJ m-2 d-1, respectively. Gas-exchange parameters, photosynthetic pigment concentrations, contents of secondary metabolites, epicuticular wax, free radical, malondialdehyde (MDA), and the activities of antioxidant enzymes were determined after 40 d of exposure. The concentrations of chlorophyll (Chl) a, Chl b, total Chl, carotenoid (Car), and the ratio Chl a/b in the pine needles were in the following order: T1 > T2 > T3. Compared with the control, the contents of flavonoids and epicuticular wax significantly decreased in all levels of supplementary UV-B radiations (p<0.05). Moreover, the contents of hydrogen peroxide (H2O2) and MDA significantly increased with the enhanced UV-B radiations (p<0.05). Korean pine can increase the catalase, ascorbate peroxidase, and superoxide dismutase activities to prevent oxidative stress by supplementary UV-B radiation. However, its defence mechanism is not efficient enough to prevent UV-B-induced damage. and Y. G. Zu ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

448-458

Source:

Photosynthetica | 2011 Volume:49 | Number:3

Harvested from:

CDK

Metadata only:

false