Abstract
Key message
Selective autophagy functions as a regulatory mechanism by targeting native and functional proteins to ensure their proper levels and activities in plant adaptive responses.
Abstract
Autophagy is a cellular degradation and recycling pathway with a key role in cellular homeostasis and metabolism. Autophagy is initiated with the biogenesis of autophagosomes, which fuse with the lysosomes or vacuoles to release their contents for degradation. Under nutrient starvation or other adverse environmental conditions, autophagy usually targets unwanted or damaged proteins, organelles and other cellular components for degradation and recycling to promote cell survival. Over the past decade, however, a substantial number of studies have reported that autophagy in plants also functions as a regulatory mechanism by targeting enzymes, structural and regulatory proteins that are not necessarily damaged or dysfunctional to ensure their proper abundance and function to facilitate cellular changes required for response to endogenous and environmental conditions. During plant-pathogen interactions in particular, selective autophagy targets specific pathogen components as a defense mechanism and pathogens also utilize autophagy to target functional host factors to suppress defense mechanisms. Autophagy also targets native and functional protein regulators of plant heat stress memory, hormone signaling, and vesicle trafficking associated with plant responses to abiotic and other conditions. In this review, we discuss advances in the regulatory roles of selective autophagy through targeting of native proteins in plant adaptive responses, what questions remain and how further progress in the analysis of these special regulatory roles of autophagy can help understand biological processes important to plants.
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This research was supported by Zhejiang Provincial Natural Science Foundation of China under Grant No. LY22C150007, the Key Research and Development Program of Lishui under Grant No. 2020ZDYF08 and Lishui University Initial Funding under Grant No. QD1503.
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YZ conceived the idea. YZ, GSX, LS, MJC, CYH, YLY, XYY, SCC, WWOY and ZKX wrote and evaluated the manuscript.
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Zhang, Y., Xia, G., Sheng, L. et al. Regulatory roles of selective autophagy through targeting of native proteins in plant adaptive responses. Plant Cell Rep 41, 2125–2138 (2022). https://doi.org/10.1007/s00299-022-02910-w
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DOI: https://doi.org/10.1007/s00299-022-02910-w