Effects of high temperature on the chlorophyll a fluorescence of Alhagi sparsifolia at the southern Taklamakan Desert

• Autorzy: Li L. , Li X.-Y. , Xu X.-W. , Lin L.-S. , Zeng F.-J.
• Języki publikacji: EN

Abstrakty

EN

Climate change is expected to result in an increase in the frequency and magnitude of extreme weather events. Alhagi sparsifolia is an important factor for wind prevention and sand fixation in the forelands of the Taklamakan Desert. The effects of high temperature on desert plants remain widely unknown. In this work, chlorophyll a fluorescence induction kinetics were investigated at different time stresses of 5, 20, 40, and 60 min at temperature gradients of 38–44°C at 2°C intervals. A pronounced K-step was found, and the values of the maximum quantum yield for primary photochemistry, the quantum yield of electron transport, the density of reaction centers and the performance index on absorption basis were lowest after 60 min at 44°C, thus indicating that the oxygenevolving complex was damaged, the inactivated reaction centers increased, and the activity of the photosystem II (PSII) reaction center in leaves was seriously limited. Therefore, we suggest that under normal temperature (below 42°C), the PSII of A. sparsifolia would be unaffected. When such temperature is maintained for 40 min, the activity of PSII would be limited, and when retained for 60 min, PSII may be severely damaged.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2014
• Tom: 36
• Numer: 02
• Opis fizyczny: p.243-249,fig.,ref.

Twórcy

autor

Li L.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
• University of Chinese Academy of Sciences, Beijing 100049, China
• Cele National Station of Observation & Research for Desert-Grassland Ecosystem in Xinjiang, Cele, Xinjiang 84300, China

autor

Li X.-Y.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
• Cele National Station of Observation & Research for Desert-Grassland Ecosystem in Xinjiang, Cele, Xinjiang 84300, China

autor

Xu X.-W.

• Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

autor

Lin L.-S.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
• Cele National Station of Observation & Research for Desert-Grassland Ecosystem in Xinjiang, Cele, Xinjiang 84300, China

autor

Zeng F.-J.

• State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
• Cele National Station of Observation & Research for Desert-Grassland Ecosystem in Xinjiang, Cele, Xinjiang 84300, China

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Identyfikatory

DOI

10.1007/s11738-013-1405-8