Photosynthetic responses to solar UV-A and UV-B radiation in low-and high-altitude populations of Hippophae rhamnoides

Title:

Photosynthetic responses to solar UV-A and UV-B radiation in low-and high-altitude populations of Hippophae rhamnoides

Creator:

Yang, Y. Q. and Yao, Y.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a1fde67b-f34e-46e3-bb93-0fd825aafa20
uuid:a1fde67b-f34e-46e3-bb93-0fd825aafa20
issn:0300-3604
doi:10.1007/s11099-008-0056-2

Subject:

abscisic acid, carotenoids, chlorophyll content and fluorescence, intra-specific response, photosystem 2, quenching photochemical and non-photochemical, sea buckthorn, relative water content, stomatal conductance, and water use efficiency

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Two contrasting sea buckthorn (Hippophae rhamnoides L.) populations from the low (LA) and high (HA) altitudinal regions were employed to evaluate the plant physiological responses to solar UV-A radiation and near-ambient UV-B radiation (UV-B+A) under the sheltered frames with different solar ultraviolet radiation transmittance. LA-population was more responsive to solar UV-A. Some modification caused by UV-A only existed in LA-population, such as significant reduction of leaf size, relative water content, and chlorophyll (Chl) b content as well as δ13C elevation, coupled with larger increase of contents of total carotenoids (Cars). This higher responsiveness might be an effective pre-acclimation strategy adapting for concomitant solar UV-B stress. Near-ambient UV-B+A radiation caused significant reduction of leaf size and Chl content as well as slight down-regulation of photosystem 2 activity that paralleled with higher heat dissipation, while photosynthetic rate was modestly but significantly increased. The higher photosynthesis under near-ambient UV-B+A radiation could be related to pronounced increase of leaf thickness and effective physiological modification, like the increase of leaf protective pigments (Cars and UV-absorbing compound), constant high photochemical capacity, and improved water economy. and Y. Q. Yang, Y. Yao.

Language:

Multiple languages

Rights:

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

Coverage:

307-311

Source:

Photosynthetica | 2008 Volume:46 | Number:2

Harvested from:

CDK

Metadata only:

false