Intracellular Signaling by Diffusion: Can Waves of Hydrogen Peroxide Transmit Intracellular Information in Plant Cells?

Hydrogen Peroxide and Nitric Oxide Generation in Plant Cells: Overview and Queries

Nitric Oxide and Hydrogen Peroxide Signaling in Higher Plants ◽

10.1007/978-3-030-11129-8_1 ◽

2019 ◽

pp. 1-16 ◽

Cited By ~ 1

Author(s):

José M. Palma ◽

Dharmendra K. Gupta ◽

Francisco J. Corpas

Keyword(s):

Nitric Oxide ◽

Hydrogen Peroxide ◽

Plant Cells

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S-Nitrosothiol Signaling Is involved in Regulating Hydrogen Peroxide Metabolism of Zinc-Stressed Arabidopsis

Plant and Cell Physiology ◽

10.1093/pcp/pcz138 ◽

2019 ◽

Vol 60 (11) ◽

pp. 2449-2463 ◽

Cited By ~ 5

Author(s):

Zs Kolbert ◽

ï¿½ Molnï¿½r ◽

D Olï¿½h ◽

G Feigl ◽

E Horvï¿½th ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Plant Cells ◽

Thioredoxin Reductase ◽

Protein S ◽

Protein Nitration ◽

Wild Type ◽

Accumulation Capacity ◽

Zn Tolerance ◽

Activity Loss ◽

New Evidence

Abstract Accumulation of heavy metals such as zinc (Zn) disturbs the metabolism of reactive oxygen (e.g. hydrogen peroxide, H2O2) and nitrogen species (e.g. nitric oxide, NO; S-nitrosoglutathione, GSNO) in plant cells; however, their signal interactions are not well understood. Therefore, this study examines the interplay between H2O2 metabolism and GSNO signaling in Arabidopsis. Comparing the Zn tolerance of the wild type (WT), GSNO reductase (GSNOR) overexpressor 35S::FLAG-GSNOR1 and GSNOR-deficient gsnor1-3, we observed relative Zn tolerance of gsnor1-3, which was not accompanied by altered Zn accumulation capacity. Moreover, in gsnor1-3 plants Zn did not induce NO/S-nitrosothiol (SNO) signaling, possibly due to the enhanced activity of NADPH-dependent thioredoxin reductase. In WT and 35S::FLAG-GSNOR1, GSNOR was inactivated by Zn, and Zn-induced H2O2 is directly involved in the GSNOR activity loss. In WT seedlings, Zn resulted in a slight intensification of protein nitration detected by Western blot and protein S-nitrosation observed by resin-assisted capture of SNO proteins (RSNO-RAC). LC-MS/MS analyses indicate that Zn induces the S-nitrosation of ascorbate peroxidase 1. Our data collectively show that Zn-induced H2O2 may influence its own level, which involves GSNOR inactivation-triggered SNO signaling. These data provide new evidence for the interplay between H2O2 and SNO signaling in Arabidopsis plants affected by metal stress.

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Hydrogen peroxide—a central hub for information flow in plant cells

AoB Plants ◽

10.1093/aobpla/pls014 ◽

2012 ◽

Vol 2012 ◽

Cited By ~ 185

Author(s):

Veselin Dimitrov Petrov ◽

Frank Van Breusegem

Keyword(s):

Hydrogen Peroxide ◽

Information Flow ◽

Plant Cells

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Plant Autophagy: An Intricate Process Controlled by Various Signaling Pathways

Frontiers in Plant Science ◽

10.3389/fpls.2021.754982 ◽

2021 ◽

Vol 12 ◽

Author(s):

Pingping Wang ◽

Tongtong Wang ◽

Jingyi Han ◽

Ming Li ◽

Yanxiu Zhao ◽

...

Keyword(s):

Signaling Pathways ◽

Stress Responses ◽

Intracellular Signaling ◽

Regulatory Networks ◽

Plant Cells ◽

Research Progress ◽

Hormone Signaling ◽

Important Regulator ◽

Reactive Oxygen Species Signaling ◽

External Signals

Autophagy is a ubiquitous process used widely across plant cells to degrade cellular material and is an important regulator of plant growth and various environmental stress responses in plants. The initiation and dynamics of autophagy in plant cells are precisely controlled according to the developmental stage of the plant and changes in the environment, which are transduced into intracellular signaling pathways. These signaling pathways often regulate autophagy by mediating TOR (Target of Rapamycin) kinase activity, an important regulator of autophagy initiation; however, some also act via TOR-independent pathways. Under nutrient starvation, TOR activity is suppressed through glucose or ROS (reactive oxygen species) signaling, thereby promoting the initiation of autophagy. Under stresses, autophagy can be regulated by the regulatory networks connecting stresses, ROS and plant hormones, and in turn, autophagy regulates ROS levels and hormone signaling. This review focuses on the latest research progress in the mechanism of different external signals regulating autophagy.

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