Photosynthesis, non-photochemical pathways and activities of antioxidant enzymes in a resilient evergreen oak under different climatic conditions from a valley-savanna in Southwest China

Physiologia Plantarum
Jun-Jie ZhuKun-Fang Cao

Abstract

Plants in the savanna-valleys in Southwest China are annually exposed to different combinations of multiple stresses from the hot-rainy, to chill-dry, and to warm-dry seasons. This study monitored seasonal changes in photosynthesis and photoprotection in an evergreen oak (Cyclobalanopsis helferiana) from one of these valleys for four years during which usual and abnormal drought occurred. In general, during the study period with decreasing xylem water potential (Psix), photosynthetic gas exchange, quantum yield of photosystem II (PSII) photochemistry and activities of most of the measured antioxidant enzymes decreased, while activities of the xanthophyll cycle and associated non-photochemical energy dissipation and glutathione peroxidase (GP) (EC 1.11.1.9) increased. In a fairly severe chill period, high concentration of reactive oxygen species induced high activities of most of the antioxidant enzymes and relatively stronger decrease in gas exchange. In the most severe dry period, even when predawn Psix decreased down to -4 MPa, considerable Pn (maximum photosynthetic rate) (4 micromol m(-2) s(-1)) was still maintained in midmorning. At this time, most of the antioxidant enzyme activities decreased to the lowest values, wherea...Continue Reading

References

Jan 1, 1984·Methods in Enzymology·H Aebi
Jan 1, 1995·Methods in Enzymology·F UrsiniL Flohé
Feb 13, 2001·Trends in Plant Science·D J Allen, D R Ort
Jul 11, 2002·Free Radical Biology & Medicine·Hartmut Kühn, Astrid Borchert
Nov 13, 2002·Plant Physiology·Ludmila RizhskyRon Mittler
Feb 15, 2003·Plant Physiology·María Del Carmen Córdoba-PedregosaJosé Antonio González-Reyes
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Kozi Asada
Mar 23, 2004·The Journal of Biological Chemistry·Xiao-Ping LiKrishna K Niyogi
Dec 22, 2004·Journal of Experimental Botany·Krishna K NiyogiHou-Sung Jung
Mar 21, 2006·FEBS Letters·Sophie CrouchmanPeter Horton
Apr 1, 2007·Functional Plant Biology : FPB·Dmytro Kornyeyev, Luke Hendrickson

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Citations

Apr 30, 2014·BMC Plant Biology·Yuepeng SongDeqiang Zhang
Jan 22, 2013·Physiologia Plantarum·Florine Poiroux-GonordLaurent Urban
Aug 13, 2013·Plant Physiology and Biochemistry : PPB·Jun-Jie ZhuJiang-Xiong Liao
Aug 22, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xiaohui LiTiezhao Yang

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