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Article

Insights into Regulation of C2 and C4 Photosynthesis in Amaranthaceae/Chenopodiaceae Using RNA-Seq

1
Systematics, Biodiversity and Evolution of Plants, Ludwig Maximilian University Munich, 80638 Munich, Germany
2
Martinstraße 20, 55116 Mainz, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Alberto Mezzetti
Int. J. Mol. Sci. 2021, 22(22), 12120; https://doi.org/10.3390/ijms222212120
Received: 12 October 2021 / Revised: 2 November 2021 / Accepted: 3 November 2021 / Published: 9 November 2021
(This article belongs to the Special Issue Molecular Mechanisms of Natural and Artificial Photosynthesis)
Amaranthaceae (incl. Chenopodiaceae) shows an immense diversity of C4 syndromes. More than 15 independent origins of C4 photosynthesis, and the largest number of C4 species in eudicots signify the importance of this angiosperm lineage in C4 evolution. Here, we conduct RNA-Seq followed by comparative transcriptome analysis of three species from Camphorosmeae representing related clades with different photosynthetic types: Threlkeldia diffusa (C3), Sedobassia sedoides (C2), and Bassia prostrata (C4). Results show that B. prostrata belongs to the NADP-ME type and core genes encoding for C4 cycle are significantly upregulated when compared with Sed. sedoides and T. diffusa. Sedobassia sedoides and B. prostrata share a number of upregulated C4-related genes; however, two C4 transporters (DIT and TPT) are found significantly upregulated only in Sed. sedoides. Combined analysis of transcription factors (TFs) of the closely related lineages (Camphorosmeae and Salsoleae) revealed that no C3-specific TFs are higher in C2 species compared with C4 species; instead, the C2 species show their own set of upregulated TFs. Taken together, our study indicates that the hypothesis of the C2 photosynthesis as a proxy towards C4 photosynthesis is questionable in Sed. sedoides and more in favour of an independent evolutionary stable state. View Full-Text
Keywords: Amaranthaceae; C4 photosynthesis; Caryophyllales; Chenopodiaceae; complex trait evolution; gene regulation; Salsola; transcription factor Amaranthaceae; C4 photosynthesis; Caryophyllales; Chenopodiaceae; complex trait evolution; gene regulation; Salsola; transcription factor
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MDPI and ACS Style

Siadjeu, C.; Lauterbach, M.; Kadereit, G. Insights into Regulation of C2 and C4 Photosynthesis in Amaranthaceae/Chenopodiaceae Using RNA-Seq. Int. J. Mol. Sci. 2021, 22, 12120. https://doi.org/10.3390/ijms222212120

AMA Style

Siadjeu C, Lauterbach M, Kadereit G. Insights into Regulation of C2 and C4 Photosynthesis in Amaranthaceae/Chenopodiaceae Using RNA-Seq. International Journal of Molecular Sciences. 2021; 22(22):12120. https://doi.org/10.3390/ijms222212120

Chicago/Turabian Style

Siadjeu, Christian, Maximilian Lauterbach, and Gudrun Kadereit. 2021. "Insights into Regulation of C2 and C4 Photosynthesis in Amaranthaceae/Chenopodiaceae Using RNA-Seq" International Journal of Molecular Sciences 22, no. 22: 12120. https://doi.org/10.3390/ijms222212120

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