Functioning of potassium and magnesium in photosynthesis, photosynthate translocation and photoprotection
Year: 2018
Type: article
Abstract: Potassium (K) and magnesium (Mg) are mineral nutrients that are required in large quantities by plants. Both elements critically contribute to the process of photosynthesis and the subsequent long‐distance transport of photoassimilates. If K or Mg is not present in sufficient quantities in photosynthetic tissues, complex interactions of anatomical, physiological and biochemical responses result in a reduction of photosynthetic carbon assimilation. As a consequence, excessive production of reactive oxygen species causes photo‐oxidation of the photosynthetic apparatus and causes an up‐regulation of photoprotective mechanisms. In this article, we review the functioning of K and Mg in processes directly or indirectly associated with photosynthesis. Focus is given to chloroplast ultrastructure, light‐dependent and ‐independent reactions of photosynthesis and the diffusion of CO2 – a major substrate for photosynthesis – into chloroplasts. We further emphasize their contribution to phloem‐loading and long‐distance transport of photoassimilates and to the photoprotection of the photosynthetic apparatus.
Source: Physiologia Plantarum
DOI: 10.1111/ppl.12747
Authors: Merle Tränkner, Ershad Tavakol, Bálint Jákli
Institutions: University of Göttingen, K+S (Germany)
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $4,150
OpenAlex ID: W2799301829