The nitric oxide production in the moss Physcomitrella patens is mediated by nitrate reductase

PloS One
Rigoberto Medina-AndrésVerónica Lira-Ruan

Abstract

During the last 20 years multiple roles of the nitric oxide gas (•NO) have been uncovered in plant growth, development and many physiological processes. In seed plants the enzymatic synthesis of •NO is mediated by a nitric oxide synthase (NOS)-like activity performed by a still unknown enzyme(s) and nitrate reductase (NR). In green algae the •NO production has been linked only to NR activity, although a NOS gene was reported for Ostreococcus tauri and O. lucimarinus, no other Viridiplantae species has such gene. As there is no information about •NO synthesis neither for non-vascular plants nor for non-seed vascular plants, the interesting question regarding the evolution of the enzymatic •NO production systems during land plant natural history remains open. To address this issue the endogenous •NO production by protonema was demonstrated using Electron Paramagnetic Resonance (EPR). The •NO signal was almost eliminated in plants treated with sodium tungstate, which also reduced the NR activity, demonstrating that in P. patens NR activity is the main source for •NO production. The analysis with confocal laser scanning microscopy (CLSM) confirmed endogenous NO production and showed that •NO signal is accumulated in the cytoplasm o...Continue Reading

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Citations

Jan 10, 2017·Trends in Plant Science·Alejandro Chamizo-AmpudiaEmilio Fernandez
Mar 19, 2016·Plant, Cell & Environment·Alejandro Chamizo-AmpudiaEmilio Fernández
Jul 16, 2020·Environmental Microbiology·Heidy Peidro-GuzmánRamón Alberto Batista-García
Oct 15, 2020·Journal of Experimental Botany·Zsuzsanna KolbertAndrea Rónavári
Dec 1, 2017·Journal of Virology·Evelyne DerelleNigel H Grimsley

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Methods Mentioned

BETA
confocal microscopy
transgenic

Software Mentioned

Bruker
ImageJ

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