Chlorophyll a fluorescence of typical desert plant Alhagi sparsifolia Shap. at two light levels

Title:

Chlorophyll a fluorescence of typical desert plant Alhagi sparsifolia Shap. at two light levels

Creator:

Li, L., Li, X. Y., Zeng, F. J., and Lin, L. S.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:8032fdc3-793f-474f-8128-e839024f79f4
uuid:8032fdc3-793f-474f-8128-e839024f79f4
issn:0300-3604
doi:10.1007/s11099-016-0195-9

Subject:

fotosyntéza, photosynthesis, shade, quantum yield, diurnal changes, electron transport chain, photosystem II activity, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Alhagi sparsifolia Shap. is exposed to a high-irradiance environment as the main vegetation found in the forelands of the Taklamakan Desert. We investigated chlorophyll a fluorescence emission of A. sparsifolia seedlings grown under ambient (HL) and shade (LL) conditions. Our results indicated that the fluorescence intensity in the leaves was significantly higher for LL-grown plants than that under HL. High values of the maximum quantum yield of PSII for primary photochemistry (φPo) and the quantum yield that an electron moves further than QA - (φEo) in the plants under LL conditions suggested that the electron flow from QA - (primary quinone electron acceptors of PSII) to QB (secondary quinone acceptor of PSII) or QB - was enhanced at LL compared to natural HL conditions. The efficiency/probability with which an electron from the intersystem electron carriers was transferred to reduce end electron acceptors at the PSI acceptor side and the quantum yield for the reduction of end electron acceptors at the PSI acceptor side were opposite to φPo, and φEo. Thus, we concluded that the electron transport on the donor side of PSII was blocked under LL conditions, while acceptor side was inhibited at the HL conditions. The PSII activity of electron transport in the plants grown in shade was enhanced, while the energy transport from PSII to PSI was blocked compared to the plants grown at HL conditions. Furthermore, PSII activity under HL was seriously affected in midday, while the plants grown in shade enhanced their energy transport., L. Li, X. Y. Li, F. J. Zeng, L. S. Lin., and Seznam literatury

Language:

Multiple languages

Rights:

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

Coverage:

351-358

Source:

Photosynthetica | 2016 Volume:54 | Number:3

Harvested from:

CDK

Metadata only:

false