Abstract
Nitric oxide (NO) emerges as signalling molecule, which is involved in diverse physiological processes in plants. High mobility metal interferes with NO signaling. The exogenous NO alleviates metal stress, whereas endogenous NO contributes to metal toxicity in plants. Owing to different cellular localization and concentration, NO may act as multifunctional regulator in plant responses to metal stress. It not only plays a crucial role in the regulation of gene expression, but serves as a long-distance signal. Through tight modulation of redox signaling, the integration among NO, reactive oxygen species and stress-related hormones in plants determines whether plants stimulate death pathway or activate survival signaling.
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Abbreviations
- ABA:
-
Abscisic acid
- ACO:
-
1-Aminocyclopropane-1-carboxylate oxidase
- ACS:
-
1-Aminocyclopropane-1-carboxylate synthase
- APX:
-
Ascorbate peroxidase
- As:
-
Arsenic
- BRs:
-
Brassinosteroids
- CAT:
-
Catalase
- Cu:
-
Copper
- Cd:
-
Cadmium
- cPTIO:
-
2-(4-Carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide
- CTK:
-
Cytokinin
- DAF-FM:
-
4-Amino-5-methylamino-2′,7′-difluorofluorescein
- ET:
-
Ethylene
- GSNOR1 :
-
S-Nitrosoglutathione reductase gene
- Hsp71.2 :
-
Heat shock protein 71.2
- JA:
-
Jasmonic acid
- L-NMMA:
-
N G-Monomethyl-arginine monoacetate
- MAPK:
-
Mitogen-activated protein kinase
- MAT-1:
-
Met adenosyltransferases
- Ni:
-
Nickel
- NO:
-
Nitric oxide
- NOS:
-
Nitric oxide synthase
- NOX:
-
NADPH oxidase
- NR:
-
Nitrate reductase
- PA:
-
Polyamines
- PAL:
-
Phenylalanine ammonialyase
- PCD:
-
Programmed cell death
- POX:
-
Peroxidase
- PrP4A :
-
Pathogen-related proteins
- ROS:
-
Reactive oxygen species
- SAG12:
-
Senescence-associated gene 12
- SNP:
-
Sodium nitroprusside
- Zn:
-
Zinc
- ZR:
-
Zeatin
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 30960181 and 31260296) and 2011 Guangxi Innovation Program for Graduates (GXU11T31076).
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He, H., He, L. & Gu, M. The diversity of nitric oxide function in plant responses to metal stress. Biometals 27, 219–228 (2014). https://doi.org/10.1007/s10534-014-9711-1
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DOI: https://doi.org/10.1007/s10534-014-9711-1