Universität zu Köln

Krone, Raissa ORCID: 0009-0002-0378-945X, Gerlich, Silke ORCID: 0000-0003-3043-5657, Mertens, Mette ORCID: 0009-0008-2375-1700, Koprivova, Anna ORCID: 0000-0001-8168-4536, Westhoff, Philipp ORCID: 0000-0002-3494-9420 and Kopriva, Stanislav ORCID: 0000-0002-7416-6551 (2025). C4 plants respond to phosphate starvation differently than C3 plants. Plant Physiology, 198 (4). pp. 1-13. Oxford University Press. ISSN 0032-0889

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Abstract

[Artikel-Nr.: kiaf327] C4 photosynthesis concentrates CO2 around Rubisco, thereby decreasing photorespiration and leading to greater productivity. C4 photosynthesis evolved several times independently in different plant families including monocots and dicots. Besides changes in carbon fixation, C4 plants have also evolved several alterations in nitrogen and sulfur nutrition, leading to better nitrogen use efficiency. Here, we utilized C3 and C4 species from 2 model systems, Flaveria and Panicum, to ask whether the evolution of C4 photosynthesis also affected phosphate homeostasis. The accumulation of phosphate within the plant shifted from the roots to the shoots with the evolution of C4, which can probably be explained by the higher demand of phosphate for completing the C4 cycle. A limitation of carbon assimilation by phosphate availability was shown solely for the C4 dicot plant, indicating a higher sensitivity to starvation. Metabolic responses to phosphate limitation, including accumulation of amino acids, TCA cycle intermediates, and starch, were genus or species specific, rather than associated with the photosynthesis type. The expression of key phosphate starvation response genes was induced in all species by phosphate deficiency, while the high induction of microRNA399 coupled with a repression of PHOSPHATE 2 (PHO2) was especially prominent in the C4 monocot. Thus, it seems that C4 photosynthesis increases the demand for phosphate in the leaves and C4 plants either respond more strongly to phosphate deficiency than C3 plants or experience inhibition of photosynthesis.

Item Type:	Article
Creators:	Creators Email ORCID ORCID Put Code Krone, Raissa UNSPECIFIED https://orcid.org/0009-0002-0378-945X UNSPECIFIED Gerlich, Silke UNSPECIFIED https://orcid.org/0000-0003-3043-5657 UNSPECIFIED Mertens, Mette UNSPECIFIED https://orcid.org/0009-0008-2375-1700 UNSPECIFIED Koprivova, Anna UNSPECIFIED https://orcid.org/0000-0001-8168-4536 UNSPECIFIED Westhoff, Philipp UNSPECIFIED https://orcid.org/0000-0002-3494-9420 UNSPECIFIED Kopriva, Stanislav UNSPECIFIED https://orcid.org/0000-0002-7416-6551 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-811429
Identification Number:	10.1093/plphys/kiaf327
Journal or Publication Title:	Plant Physiology
Volume:	198
Number:	4
Page Range:	pp. 1-13
Number of Pages:	13
Date:	4 August 2025
Publisher:	Oxford University Press
ISSN:	0032-0889
Language:	English
Faculty:	Central Institutions / Interdisciplinary Research Centers Faculty of Mathematics and Natural Sciences
Divisions:	Außeruniversitäre Forschungseinrichtungen > Forschungszentrum Jülich CEPLAS - Cluster of Excellence on Plant Sciences
Subjects:	Life sciences
['eprint_fieldname_oa_funders' not defined]:	Publikationsfonds UzK
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/81142