Rights statement: This is the peer reviewed version of the following article: Hernández-Verdeja, T., Vuorijoki, L., Jin, X., Vergara, A., Dubreuil, C. and Strand, Å. (2022), GENOMES UNCOUPLED1 plays a key role during the de-etiolation process in Arabidopsis. New Phytol, 235: 188-203. doi:10.1111/nph.18115 which has been published in final form at https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.18115 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Accepted author manuscript, 2.75 MB, PDF document
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Final published version
Licence: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - GENOMES UNCOUPLED1 plays a key role during the de-etiolation process in Arabidopsis
AU - Hernandez-Verdeja, Tamara
AU - Vuorijoki, Linda
AU - Jin, Xu
AU - Vergara, Alexander
AU - Dubreuil, Carole
AU - Strand, Asa
N1 - This is the peer reviewed version of the following article: Hernández-Verdeja, T., Vuorijoki, L., Jin, X., Vergara, A., Dubreuil, C. and Strand, Å. (2022), GENOMES UNCOUPLED1 plays a key role during the de-etiolation process in Arabidopsis. New Phytol, 235: 188-203. doi:10.1111/nph.18115 which has been published in final form at https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.18115 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
PY - 2022/7/31
Y1 - 2022/7/31
N2 - 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 chlorophyll precursors cause 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 GUN1-mediated retrograde signal restricts chloroplast development in darkness and during early light response by regulating the transcription of several critical TFs 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.
AB - 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 chlorophyll precursors cause 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 GUN1-mediated retrograde signal restricts chloroplast development in darkness and during early light response by regulating the transcription of several critical TFs 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.
KW - chloroplast
KW - greening
KW - GUN1
KW - light signalling
KW - plastid retrograde signalling
KW - transcriptional regulation
U2 - 10.1111/nph.18115
DO - 10.1111/nph.18115
M3 - Journal article
VL - 235
SP - 188
EP - 203
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 1
ER -