Exogenously applied melatonin stimulates root growth and raises endogenous indoleacetic acid in roots of etiolated seedlings of Brassica juncea

Journal of Plant Physiology
Qian ChenBao-min Wang

Abstract

Exogenous melatonin was applied to etiolated seedlings of wild leaf mustard (Brassica juncea) and the effect on root growth and endogenous indole-3-acetic acid (IAA) levels determined. The results show that 0.1microM melatonin has a stimulatory effect on root growth, while 100microM is inhibitory. Furthermore, the stimulatory effect was only detectable in young seedlings (2-d old). Older seedlings (4-d old) appear to be less susceptible to both the stimulatory and the inhibitory effect of melatonin. Exogenous application of 0.1microM melatonin also raised the endogenous levels of free IAA in roots, while higher concentrations had no significant effect. The specific mechanism that causes exogenous melatonin to increase the amount of free IAA in roots, paired with a stimulation of root growth, remains to be uncovered.

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Citations

Jan 5, 2012·Analytical and Bioanalytical Chemistry·Fuyou DuHuwei Liu
Aug 27, 2014·Trends in Plant Science·Marino B Arnao, Josefa Hernández-Ruiz
Mar 1, 2016·Frontiers in Plant Science·Rüdiger Hardeland
Dec 26, 2015·Analytica Chimica Acta·Sara PorfírioParastoo Azadi
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Nov 19, 2015·Frontiers in Plant Science·Jibiao FanJinmin Fu
Mar 26, 2009·Journal of Pineal Research·Masateru Okazaki, Hiroshi Ezura
Apr 18, 2012·Journal of Pineal Research·Ramón Pelagio-FloresJosé López-Bucio
Oct 31, 2012·Journal of Pineal Research·Ping WangFengwang Ma
Oct 27, 2015·Mycorrhiza·Qiang-Sheng WuQing-Hua Wu
Aug 27, 2015·Journal of Agricultural and Food Chemistry·Yolanda AguileraMaría A Martín-Cabrejas
Jun 27, 2015·Plant Physiology and Biochemistry : PPB·Ismaél Gatica HernándezMaría Fernanda Silva
Nov 2, 2011·Plant Signaling & Behavior·Akula Ramakrishna, Gokare Aswathanarayana Ravishankar
Oct 10, 2014·Journal of Experimental Botany·Wei WeiShou-Yi Chen
Aug 16, 2014·Journal of Experimental Botany·Na ZhangYang-Dong Guo
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Sep 27, 2018·Journal of Pineal Research·Mukesh Kumar KanwarJie Zhou
Feb 10, 2019·International Journal of Molecular Sciences·Haoshuang ZhanWeining Song

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