The latitudinal and altitudinal variations in the biochemical mechanisms of temperature dependence of photosynthesis within Fallopia japonica

Satoshi Machino, Soichiro Nagano, Kouki Hikosaka

Research output: Contribution to journalArticlepeer-review

Abstract

The temperature dependence of the light-saturated rate of photosynthesis has large interspecific and intraspecific variations, which may be related to adaptation to the habitat environment. As both higher latitude and altitude have lower habitat temperature, we addressed the question of whether temperature adaptation is similar between high-latitude and high-altitude ecotypes. We raised three ecotypes of Fallopia japonica collected from high-latitude and low-altitude (Hirosaki), high-altitude and low-latitude (Fuji), and low-altitude and low-latitude (Tokyo) habitats at two growth temperatures, and determined the temperature dependence of photosynthesis and related biochemical and physical traits, including mesophyll conductance. Temperature dependence of photosynthesis and related traits differed among ecotypes, but the difference was not significant between Fuji and Tokyo when grown at a low-temperature. The simulation analysis suggested that the temperature dependence of Rubisco activity and the CO2 concentration in the chloroplasts had large contributions to the variation in the temperature dependence of photosynthesis. We conclude that both ecotypes from high-altitude and high-latitude habitats tend to have a temperature dependence of photosynthesis which is adaptive to low-temperature conditions, but the mechanisms to adapt to high-altitude are not necessarily the same as compared with those to high-latitude.

Original languageEnglish
Article number104248
JournalEnvironmental and Experimental Botany
Volume181
DOIs
Publication statusPublished - 2021 Jan

Keywords

  • Ecotypic differentiation
  • Mesophyll conductance
  • Optimal temperature of photosynthesis
  • Rubisco kinetics
  • Temperature acclimation
  • Temperature adaptation

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Agronomy and Crop Science
  • Plant Science

Fingerprint Dive into the research topics of 'The latitudinal and altitudinal variations in the biochemical mechanisms of temperature dependence of photosynthesis within Fallopia japonica'. Together they form a unique fingerprint.

Cite this