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Ancestral light and chloroplast regulation form the foundations for C4 gene expression

Ancestral light and chloroplast regulation form the foundations for C4 gene expression
Ancestral light and chloroplast regulation form the foundations for C4 gene expression
C4 photosynthesis acts as a carbon concentrating mechanism that leads to large increases in photosynthetic efficiency. The C4 pathway is found in more than 60 plant lineages1 but the molecular enablers of this evolution are poorly understood. In particular, it is unclear how non-photosynthetic proteins in the ancestral C3 system have repeatedly become strongly expressed and integrated into photosynthesis gene regulatory networks in C4 leaves. Here, we provide clear evidence that in C3 leaves, genes encoding key enzymes of the C4 pathway are already co-regulated with photosynthesis genes and are controlled by both light and chloroplast-to-nucleus signalling. In C4 leaves this regulation becomes increasingly dependent on the chloroplast. We propose that regulation of C4 cycle genes by light and the chloroplast in the ancestral C3 state has facilitated the repeated evolution of the complex and convergent C4 trait.
Burgess, Steven J.
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Granero-Moya, Ignasi
b7e5ef41-cf12-4267-afb3-1c0e2242f310
Grangé-Guermente, Mathieu J.
b6924841-06b1-4f85-bad6-7759dc784c73
Boursnell, Chris
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Terry, Matthew J.
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Hibberd, Julian M.
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Burgess, Steven J.
980cd136-aeea-4bab-9e68-ad4e0a19d4db
Granero-Moya, Ignasi
b7e5ef41-cf12-4267-afb3-1c0e2242f310
Grangé-Guermente, Mathieu J.
b6924841-06b1-4f85-bad6-7759dc784c73
Boursnell, Chris
81e1aa58-126f-4406-95db-1fa4c155d6f0
Terry, Matthew J.
a8c2cd6b-8d35-4053-8d77-3841c2427c3b
Hibberd, Julian M.
3215191e-88b3-4a2f-ba20-5e468c0c39fb

Burgess, Steven J., Granero-Moya, Ignasi, Grangé-Guermente, Mathieu J., Boursnell, Chris, Terry, Matthew J. and Hibberd, Julian M. (2016) Ancestral light and chloroplast regulation form the foundations for C4 gene expression. Nature Plants, 2 (16161). (doi:10.1038/nplants.2016.161). (PMID:27748771)

Record type: Article

Abstract

C4 photosynthesis acts as a carbon concentrating mechanism that leads to large increases in photosynthetic efficiency. The C4 pathway is found in more than 60 plant lineages1 but the molecular enablers of this evolution are poorly understood. In particular, it is unclear how non-photosynthetic proteins in the ancestral C3 system have repeatedly become strongly expressed and integrated into photosynthesis gene regulatory networks in C4 leaves. Here, we provide clear evidence that in C3 leaves, genes encoding key enzymes of the C4 pathway are already co-regulated with photosynthesis genes and are controlled by both light and chloroplast-to-nucleus signalling. In C4 leaves this regulation becomes increasingly dependent on the chloroplast. We propose that regulation of C4 cycle genes by light and the chloroplast in the ancestral C3 state has facilitated the repeated evolution of the complex and convergent C4 trait.

Text
Burgess et al (2016) Nature Plants - Ancestral light and chloroplast regulation form the foundations for C4 gene expression.pdf - Accepted Manuscript
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Accepted/In Press date: 20 September 2016
e-pub ahead of print date: 17 October 2016
Published date: 17 October 2016
Organisations: Environmental

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Local EPrints ID: 401781
URI: https://eprints.soton.ac.uk/id/eprint/401781
PURE UUID: 76bbd3cc-4819-4d61-8fd0-55168806bf6d
ORCID for Matthew J. Terry: ORCID iD orcid.org/0000-0001-5002-2708

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Date deposited: 19 Oct 2016 15:42
Last modified: 15 Aug 2019 05:16

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