GENOMES UNCOUPLED1 plays a key role during the de-etiolation process in Arabidopsis Visa övriga samt affilieringar
2022 (Engelska) Ingår i: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 235, nr 1, s. 188-203Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
One of the most dramatic challenges in the life of a plant occurs when the seedling emerges from the soil and exposure to light triggers expression of genes required for establishment of photosynthesis. This process needs to be tightly regulated, as premature accumulation of light-harvesting proteins and photoreactive Chl precursors causes oxidative damage when the seedling is first exposed to light. Photosynthesis genes are encoded by both nuclear and plastid genomes, and to establish the required level of control, plastid-to-nucleus (retrograde) signalling is necessary to ensure correct gene expression. We herein show that a negative GENOMES UNCOUPLED1 (GUN1)-mediated retrograde signal restricts chloroplast development in darkness and during early light response by regulating the transcription of several critical transcription factors linked to light response, photomorphogenesis, and chloroplast development, and consequently their downstream target genes in Arabidopsis. Thus, the plastids play an essential role during skotomorphogenesis and the early light response, and GUN1 acts as a safeguard during the critical step of seedling emergence from darkness. Ort, förlag, år, upplaga, sidor John Wiley & Sons, 2022. Vol. 235, nr 1, s. 188-203
Nyckelord [en]
chloroplast, greening, GUN1, light signalling, plastid retrograde signalling, transcriptional regulation
Nationell ämneskategori
Botanik Biokemi och molekylärbiologi
Identifikatorer URN: urn:nbn:se:umu:diva-193976 DOI: 10.1111/nph.18115 ISI: 000781326900001 PubMedID: 35322876 Scopus ID: 2-s2.0-85127990624 OAI: oai:DiVA.org:umu-193976 DiVA, id: diva2:1655455
Forskningsfinansiär Stiftelsen för strategisk forskning (SSF), ARC19‐0051 2022-05-022022-05-022022-07-12 Bibliografiskt granskad