Acclimation of photosystem II to high temperature in two Wedelia species from different geographical origins: implications for biological invasions upon global warming

Journal of Experimental Botany
Liying SongChanglian Peng

Abstract

More intense, more frequent, and longer heat waves are expected in the future due to global warming, which could have dramatic ecological impacts. However, few studies have involved invasive species. The aims of this study were to examine the effect of extreme heating (40/35 degrees C for 30 d) on the growth and photosynthesis of an alien invasive species Wedelia trilobata and its indigenous congener (Wedelia chinensis) in South China, and to determine the development of this invasive species and its potential adaptive mechanism. In comparison with W. chinensis, W. trilobata suffered less inhibition of the relative growth rate (RGR) and biomass production due to high temperature, which was consistent with the changes of photosystem II (PSII) activity and net photosynthetic rate (P(n)). High temperature caused a partial inhibition of PSII, but the adverse effect was more severe in W. chinensis. Measurement of the minimum fluorescence (F(o)) versus temperature curves showed that W. trilobata had a higher inflexion temperature of F(o) (T(i)), indicating greater thermostability of the photosynthetic apparatus. Moreover, comparisons of absorbed light energy partitioning revealed that W. trilobata increased xanthophyll-dependent ther...Continue Reading

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Citations

Sep 5, 2013·Trends in Plant Science·Marta Pintó-Marijuan, Sergi Munné-Bosch
Mar 19, 2013·Global Change Biology·Josep PeñuelasAlistair S Jump
Sep 19, 2015·Ecology and Evolution·Narciso AguileraVíctor Hernández
Jun 6, 2015·Journal of Plant Research·Zhong QinRui-shan Wu
Jul 10, 2019·International Journal of Molecular Sciences·Zhuang YangZhiwei Wang
Jan 17, 2021·International Journal of Molecular Sciences·Minling CaiChanglian Peng

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