Temperature responses of photosynthesis and respiration in Populus balsamifera L.: acclimation versus adaptation.

Photosynthesis Research
Salim N SilimDavid S Kubien

Abstract

To examine the role of acclimation versus adaptation on the temperature responses of CO(2) assimilation, we measured dark respiration (R(n)) and the CO(2) response of net photosynthesis (A) in Populus balsamifera collected from warm and cool habitats and grown at warm and cool temperatures. R(n) and the rate of photosynthetic electron transport (J) are significantly higher in plants grown at 19 versus 27 degrees C; R(n) is not affected by the native thermal habitat. By contrast, both the maximum capacity of rubisco (V(cmax)) and A are relatively insensitive to growth temperature, but both parameters are slightly higher in plants from cool habitats. A is limited by rubisco capacity from 17-37 degrees C regardless of growth temperature, and there is little evidence for an electron-transport limitation. Stomatal conductance (g(s)) is higher in warm-grown plants, but declines with increasing measurement temperature from 17 to 37 degrees C, regardless of growth temperature. The mesophyll conductance (g(m)) is relatively temperature insensitive below 25 degrees C, but g(m) declines at 37 degrees C in cool-grown plants. Plants acclimated to cool temperatures have increased R(n)/A, but this response does not differ between warm- and co...Continue Reading

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Citations

Jan 27, 2012·Tree Physiology·Yan-Shih LinDavid S Ellsworth
Mar 13, 2016·Journal of Experimental Botany·Xinyou YinPaul C Struik
Sep 17, 2014·Plant, Cell & Environment·Susanne von Caemmerer, John R Evans
May 9, 2015·Journal of Experimental Botany·Sébastien PeraudeauMichael Dingkuhn
Mar 7, 2018·Plant, Cell & Environment·Ülo Niinemets
Feb 12, 2019·PloS One·Lahcen BenomarLala Amina Idrissi Hassania
Feb 2, 2019·Plant, Cell & Environment·Giulia VicoStefano Manzoni
Oct 30, 2019·The Plant Journal : for Cell and Molecular Biology·Jürgen KnauerYing Sun
Jan 3, 2018·PloS One·Shannon DillonElizabeth Pinkard
Aug 14, 2020·Tree Physiology·Maegan A GagneKatherine A McCulloh
Mar 20, 2021·Journal of Experimental Botany·Raed ElferjaniMebarek Lamara
Jul 18, 2021·Physiologia Plantarum·J Aaron HoganJeffrey M Warren

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