ArticleBMC plant biology2024
Cytonuclear evolution in fully heterotrophic plants: lifestyles and gene function determine scenarios.
Article in BMC plant biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Coordinated Evolutionary Rates in Oxidative Phosphorylation Complexes of Papilionoid Legumes: Cytonuclear Coevolution and Relaxed Selection.bioRxiv : the preprint server for biology · 2026Article
- Photosynthetic demands on translational machinery drive retention of redundant tRNA metabolism in plant organelles.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
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5 authors.
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Abstract
backgroundEvidence shows that full mycoheterotrophs and holoparasites often have reduced plastid genomes with rampant gene loss, elevated substitution rates, and deeply altered to conventional evolution in mitochondrial genomes, but mechanisms of cytonuclear evolution is unknown. Endoparasitic Sapria himalayana and mycoheterotrophic Gastrodia and Platanthera guangdongensis represent different heterotrophic types, providing a basis to illustrate cytonuclear evolution. Here, we focused on nuclear-encoded plastid / mitochondrial (N-pt / mt) -targeting protein complexes, including caseinolytic protease (ClpP), ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCo), oxidative phosphorylation system (OXPHOS), DNA recombination, replication, and repair (DNA-RRR) system, and pentatricopeptide repeat (PPR) proteins, to identify evolutionary drivers for cytonuclear interaction.
resultsThe severity of gene loss of N-pt PPR and pt-RRR genes was positively associated with increased degree of heterotrophy in full mycoheterotrophs and S. himalayana, while N-mt PPR and mt-RRR genes were retained. Substitution rates of organellar and nuclear genes encoding N-pt/mt subunits in protein complexes were evaluated, cytonuclear coevolution was identified in S. himalayana, whereas disproportionate rates of evolution were observed in the OXPHOS complex in full mycoheterotrophs, only slight accelerations in substitution rates were identified in N-mt genes of full mycoheterotrophs.
conclusionsNuclear compensatory evolution was identified in protein complexes encoded by plastid and N-pt genes. Selection shaping codon preferences, functional constraint, mt-RRR gene regulation, and post-transcriptional regulation of PPR genes all facilitate mito-nuclear evolution. Our study enriches our understanding of genomic coevolution scenarios in fully heterotrophic plants.
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