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See How I Eat My Greens—Autophagy in Plant Cells

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Abstract

Eukaryotic cells have two conserved pathways for degrading polypeptides. One is the highly selective ubiquitin–proteasome system, and the other is autophagy, a bulk degradation pathway to a lytic compartment. Autophagy in plant cells has important roles in development and responses to abiotic and biotic stresses. Furthermore, plant autophagy has been implicated in vacuole biogenesis and Golgi-independent targeting of cytoplasmic materials to vacuoles. Here I present four questions that are frequently asked by plant scientists interested in autophagy. The first question relating to tools for plant autophagy research is relatively easy to answer, while the others are open questions about regulation of autophagy, autophagic cargoes, and potential differences of plant autophagic routes from corresponding metazoan pathways. This review will discuss recent progress that may provide the answers for the latter questions.

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Abbreviations

AIM:

ATG8-interacting motif

AMPK:

adenosine monophosphate-activated protein kinase

Atg:

autophagy-related

GFP:

green fluorescent protein

LIR:

LC3-interacting region

LV:

lytic vacuole

MDC:

monodansylcadeverine

PB1:

Phox-Bem1p

PE:

phosphatidylethanolamine

PI:

phosphatidylinositol

PSV:

protein storage vacuole

RCBs:

Rubisco-containing bodies

SnRK:

Snf1-related protein kinase

TOR:

target of rapamycin

UBA:

ubiquitin-associated

UPS:

ubiquitin–proteasome system

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Acknowledgments

This work was supported for 2 years by Pusan National University Research Grant.

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  1. Department of Biological Sciences, Pusan National University, 30 Jangjeon-dong, Geumjeong-gu, Busan, 609-735, South Korea

    Taijoon Chung

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Chung, T. See How I Eat My Greens—Autophagy in Plant Cells. J. Plant Biol. 54, 339–350 (2011). https://doi.org/10.1007/s12374-011-9176-5

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