Microautophagy in cereal grains: protein storage or degradation?

Author(s)
Stefan Plott, Yasin Dagdas, Verena Ibl
Abstract

Recent research indicates an involvement of microautophagy in the uptake of seed storage proteins (SSPs) into the plant-specific protein storage vacuole (PSV), particularly in cereal grains. However, because microautophagy plays a vital role in cellular homeostasis by degrading and recycling cellular components, we question whether it is a suitable term for a process involved in long-term storage. Additionally, because fission-type microautophagy shares mechanistic similarities with the intraluminal vesicle (ILV) formation of multivesicular bodies (MVBs), we draw parallels between microautophagy and membrane remodeling facilitated by the endosomal sorting complex required for transport (ESCRT). Finally, we propose that the complex structure of cereal endosperm is an optimal tissue to study microautophagy in a plant- and tissue-specific context to decipher its molecular regulation in anabolism and catabolism.

Organisation(s)
Functional and Evolutionary Ecology
External organisation(s)
Österreichische Akademie der Wissenschaften (ÖAW), Hochschule für Technik und Wirtschaft Dresden – Hochschule für angewandte Wissenschaften
Journal
Trends in Plant Science
Volume
30
Pages
736-744
No. of pages
9
ISSN
1360-1385
DOI
https://doi.org/10.1016/j.tplants.2024.12.012
Publication date
01-2025
Peer reviewed
Yes
Austrian Fields of Science 2012
106052 Cell biology, 106002 Biochemistry, 106023 Molecular biology, 106008 Botany
Keywords
ASJC Scopus subject areas
Plant Science
Portal url
https://ucrisportal.univie.ac.at/en/publications/5390f45d-6f35-45d5-9a15-700d7e38cc0d