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Arabidopsis transcription factor ANAC102 predominantly expresses a nuclear protein and acts as a negative regulator of methyl viologen-induced oxidative stress responses

Plants, being sessile organisms, constantly need to respond to environmental stresses, often leading to the accumulation of reactive oxygen species (ROS). While ROS can be harmful, they also act as second messengers guiding plant growth and stress responses. Because chloroplasts are sensitive to env...

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Main Authors: Luo, Xiaopeng (Author) , Jiang, Xinqiang (Author) , Schmitt, Vivian (Author) , Kulkarni, Shubhada (Author) , Tran, Huy Cuong (Author) , Kacprzak, Sylwia M (Author) , Van Breusegem, Frank (Author) , Van Aken, Olivier (Author) , Vandepoele, Klaas (Author) , De Clercq, Inge (Author)
Format: Article (Journal)
Language:English
Published: 12 August 2024
In: The journal of experimental botany
Year: 2024, Volume: 75, Issue: 15, Pages: 4655-4670
ISSN:1460-2431
DOI:10.1093/jxb/erae235
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/jxb/erae235
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Author Notes:Xiaopeng Luo, Xinqiang Jiang, Vivian Schmitt, Shubhada R. Kulkarni, Huy Cuong Tran, Sylwia M. Kacprzak, Frank Van Breusegem, Olivier Van Aken, Klaas Vandepoele, and Inge De Clercq
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Summary:Plants, being sessile organisms, constantly need to respond to environmental stresses, often leading to the accumulation of reactive oxygen species (ROS). While ROS can be harmful, they also act as second messengers guiding plant growth and stress responses. Because chloroplasts are sensitive to environmental changes and are both a source and a target of ROS during stress conditions, they are important in conveying environmental changes to the nucleus, where acclimation responses are coordinated to maintain organellar and overall cellular homeostasis. ANAC102 has previously been established as a regulator of β-cyclocitral-mediated chloroplast-to-nucleus signaling, protecting plants against photooxidative stress. However, debates persist about where ANAC102 is located—in chloroplasts or in the nucleus. Our study, utilizing the genomic ANAC102 sequence driven by its native promoter, establishes ANAC102 primarily as a nuclear protein, lacking a complete N-terminal chloroplast-targeting peptide. Moreover, our research reveals the sensitivity of plants overexpressing ANAC102 to severe superoxide-induced chloroplast oxidative stress. Transcriptome analysis unraveled a dual role of ANAC102 in negatively and positively regulating genome-wide transcriptional responses to chloroplast oxidative stress. Through the integration of published data and our own study, we constructed a comprehensive transcriptional network, which suggests that ANAC102 exerts direct and indirect control over transcriptional responses through downstream transcription factor networks, providing deeper insights into the ANAC102-mediated regulatory landscape during oxidative stress.
Item Description:Veröffentlicht: 30 May 2024
Gesehen am 15.01.2025
Physical Description:Online Resource
ISSN:1460-2431
DOI:10.1093/jxb/erae235

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