ArticlePlant & cell physiology2024
Orchestration of Photosynthesis-Associated Gene Expression and Galactolipid Biosynthesis during Chloroplast Differentiation in Plants.
Article in Plant & cell physiology, 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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Who cites it
2 citing papers in PubMed.
- 2-Cys peroxiredoxins and the chaperone cpHSP70 act in concert in chloroplast biogenesis in Arabidopsis seedlings.The Plant cell · 2026Article
- Role of Galactolipids in Plastid Differentiation Before and After Light Exposure.Plants (Basel, Switzerland) · 2019Review
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3 authors.
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Abstract
The chloroplast thylakoid membrane is composed of membrane lipids and photosynthetic protein complexes, and the orchestration of thylakoid lipid biosynthesis and photosynthesis-associated protein accumulation is considered important for thylakoid development. Galactolipids consist of ∼80% of the thylakoid lipids, and their biosynthesis is fundamental for chloroplast development. We previously reported that the suppression of galactolipid biosynthesis decreased the expression of photosynthesis-associated nuclear-encoded genes (PhAPGs) and photosynthesis-associated plastid-encoded genes (PhAPGs). However, the mechanism for coordinative regulation between galactolipid biosynthesis in plastids and the expression of PhANGs and PhAPGs remains largely unknown. To elucidate this mechanism, we investigated the gene expression patterns in galactolipid-deficient Arabidopsis seedlings during the de-etiolation process. We found that galactolipids are crucial for inducing both the transcript accumulation of PhANGs and PhAPGs and the accumulation of plastid-encoded photosynthesis-associated proteins in developing chloroplasts. Genetic analysis indicates the contribution of the GENOMES UNCOUPLED1 (GUN1)-mediated plastid-to-nucleus signaling pathway to PhANG regulation in response to galactolipid levels. Previous studies suggested that the accumulation of GUN1 reflects the state of protein homeostasis in plastids and alters the PhANG expression level. Thus, we propose a model that galactolipid biosynthesis determines the protein homeostasis in plastids in the initial phase of de-etiolation and optimizes GUN1-dependent signaling to regulate the PhANG expression. This mechanism might contribute to orchestrating the biosynthesis of lipids and proteins for the biogenesis of functional chloroplasts in plants.
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