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Communications Biology:植物硫代谢受到光呼吸的刺激

已有 684 次阅读 2019-10-17 15:42 |个人分类:每日摘要|系统分类:论文交流

Plant sulphur metabolism is stimulated by photorespiration

First author: Cyril Abadie; Affiliations: Australian National University (澳大利亚国立大学)Canberra, Australia

Corresponding author: Guillaume Tcherkez

Intense efforts have been devoted to describe the biochemical pathway of plant sulphur (S) assimilation from sulphate. However, essential information on metabolic regulation of S assimilation is still lacking, such as possible interactions between S assimilation, photosynthesis and photorespiration. In particular, does S assimilation scale with photosynthesis thus ensuring sufficient S provision for amino acids synthesis? This lack of knowledge is problematic because optimization of photosynthesis is a common target of crop breeding and furthermore, photosynthesis is stimulated by the inexorable increase in atmospheric CO2. Here, we used high-resolution 33S and 13C tracing technology with NMR and LC-MS to access direct measurement of metabolic fluxes in S assimilation, when photosynthesis and photorespiration are varied via the gaseous composition of the atmosphere (CO2, O2). We show that S assimilation is stimulated by photorespiratory metabolism and therefore, large photosynthetic fluxes appear to be detrimental to plant cell sulphur nutrition.



通讯:Guillaume Tcherkez (http://biology.anu.edu.au/people/guillaume-tcherkez)



doi: https://doi.org/10.1038/s42003-019-0616-y

Journal: Communications Biology

Published date: October 16, 2019



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