Melatonin-induced CBF/DREB1s are essential for diurnal change of disease resistance and CCA1 expression in Arabidopsis

Plant Physiology and Biochemistry : PPB
Haitao ShiChaozu He

Abstract

Melatonin (N-acetyl-5-methoxytryptamine) is an important regulator of circadian rhythms and immunity in animals. However, the diurnal changes of endogenous melatonin and melatonin-mediated diurnal change of downstream responses remain unclear in Arabidopsis. Using the publicly available microarray data, we found that the transcript levels of two melatonin synthesis genes (serotonin N-acetyltransferase (SNAT) and caffeate O-methyltransferase (COMT)) and endogenous melatonin level were regulated by diurnal cycles, with different magnitudes of change. Moreover, the transcripts of C-repeat-binding factors (CBFs)/Drought response element Binding 1 factors (DREB1s) were co-regulated by exogenous melatonin and diurnal changes, indicating the possible correlation among clock, endogenous melatonin level and AtCBFs expressions. Interestingly, diurnal change of plant immunity against Pst DC3000 and CIRCADIANCLOCK ASSOCIATED 1 (CCA1) expression were largely lost in AtCBFs knockdown line-amiR-1. Taken together, this study identifies the molecular pathway underlying the diurnal changes of immunity in Arabidopsis. Notably, the diurnal changes of endogenous melatonin may regulate corresponding changes of AtCBF/DREB1s expression and their under...Continue Reading

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Citations

Aug 12, 2016·Frontiers in Plant Science·Haitao ShiChaozu He
May 17, 2018·Journal of Pineal Research·Mihir Kumar MandalChandrasekar Kousik
Sep 20, 2018·Journal of Pineal Research·Chao LiFengwang Ma
Feb 6, 2019·International Journal of Molecular Sciences·Wen-Jing YangDong-Hong Min
Oct 27, 2017·Annals of Botany·M B Arnao, J Hernández-Ruiz
Oct 27, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Hyoung-Yool Lee, Kyoungwhan Back
Oct 20, 2018·Frontiers in Microbiology·Xian ChenFengquan Liu
Jan 1, 2018·Functional Plant Biology : FPB·Lauren A E ErlandSusan J Murch

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