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Melatonin in plants

  • Małgorzata M. PosmykEmail author
  • Krystyna M. Janas
Review

Abstract

A widespread occurrence of melatonin (MEL) in plant kingdom has been reported. MEL is a highly conserved molecule occurring in evolutionary distant organisms. Its role in plants seems to be similar to that in animals. Although MEL function in plants is not well known, yet a hypothesis can be put forward that it probably functions as a night signal, coordinating responses to diurnal and photoperiodic environmental cues. It has also been suggested that MEL is an independent plant growth regulator, probably its action is analogous to IAA and it may mediate the actions of other plant growth regulators. Due to its antioxidant properties MEL may also stabilize cell red-ox status and protect them against reactive oxygen species (ROS) and other harmful environmental influence.

Keywords

Antioxidants Circadian rhythm Growth regulators Melatonin 

Abbreviations

AADC

Aromatic l-amino acid decarboxylase

CAT

Catalase

DW

Dry weight

FW

Fresh weight

GSSG-R

Glutathione reductase

GSH-Px

Glutathione peroxidase

HIOMT

Hydroxyindole-O-methyltransferase

IAA

Indole-3-acetic acid

IAAld

Indole-3-acetaldehyde

IAM

Indole-3-acetamide

IAN

Indole-3-acetonitrile

IBA

Indole-3-butyric acid

IPA

Indole-3-pyruvic acid

MEL

Melatonin

POX

Peroxidases

ROS

Reactive oxygen species

SAM

S-adenosyl-l-methionine

SNAcT

Serotonin N-acetyltransferase

SOD

Superoxide dismutase

T5H

Tryptamine 5-hydroxylase

TDA

Tryptamine deaminase

Trp5H

Tryptophan 5-hydroxylase

TrpDC

Tryptophan decarboxylase

Notes

Acknowledgments

Scientific work financed by Ministry of Science and Higher Education in 2008–2011 as a research project N N310 143035

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2008

Authors and Affiliations

  1. 1.Department of Ecophysiology and Plant DevelopmentUniversity of LodzLodzPoland

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