Nitric Oxide, Ethylene, and Auxin Cross Talk Mediates Greening and Plastid Development in Deetiolating Tomato Seedlings

Plant Physiology
Nielda K G MeloLuciano Freschi

Abstract

The transition from etiolated to green seedlings involves the conversion of etioplasts into mature chloroplasts via a multifaceted, light-driven process comprising multiple, tightly coordinated signaling networks. Here, we demonstrate that light-induced greening and chloroplast differentiation in tomato (Solanum lycopersicum) seedlings are mediated by an intricate cross talk among phytochromes, nitric oxide (NO), ethylene, and auxins. Genetic and pharmacological evidence indicated that either endogenously produced or exogenously applied NO promotes seedling greening by repressing ethylene biosynthesis and inducing auxin accumulation in tomato cotyledons. Analysis performed in hormonal tomato mutants also demonstrated that NO production itself is negatively and positively regulated by ethylene and auxins, respectively. Representing a major biosynthetic source of NO in tomato cotyledons, nitrate reductase was shown to be under strict control of both phytochrome and hormonal signals. A close NO-phytochrome interaction was revealed by the almost complete recovery of the etiolated phenotype of red light-grown seedlings of the tomato phytochrome-deficient aurea mutant upon NO fumigation. In this mutant, NO supplementation induced cot...Continue Reading

Citations

Nov 5, 2016·Environmental Science and Pollution Research International·Mohd AsgherNafees A Khan
Dec 18, 2016·Trends in Plant Science·Michael J ConsidineChristine H Foyer
Jan 6, 2018·Journal of Experimental Botany·Francisco J CorpasJosé M Palma
Jul 31, 2019·Journal of Experimental Botany·José M PalmaFrancisco J Corpas
Sep 23, 2020·Plant Cell Reports·Alexis Salazar-Iribe, Clelia De-la-Peña
Feb 16, 2017·Frontiers in Plant Science·Dörte KastenFrank Gaupels
Oct 4, 2018·Frontiers in Plant Science·Aline Bertinatto CruzLuciano Freschi
Sep 29, 2017·Frontiers in Plant Science·Santisree ParankusamKiran K Sharma
Nov 28, 2017·Environmental Science and Pollution Research International·Josiane Valéria BisonSilvia Ribeiro de Souza
Jun 19, 2018·Journal of Experimental Botany·Ricardo Ernesto BianchettiLuciano Freschi
Dec 19, 2016·Frontiers in Plant Science·Koichi Kobayashi, Tatsuru Masuda
Nov 8, 2020·Scientific Reports·Bruno Silvestre LiraMagdalena Rossi
Nov 28, 2020·Journal of Experimental Botany·Patrícia Juliana Lopes-OliveiraLuciano Freschi
Nov 7, 2020·Journal of Hazardous Materials·Javaid Akhter BhatFrancisco J Corpas
Apr 20, 2021·Trends in Plant Science·Aloysius WongChristoph Gehring
Sep 14, 2018·Journal of Agricultural and Food Chemistry·Gai-Fang YaoHua Zhang
Oct 6, 2021·Physiologia Plantarum·Rasha Althiab-AlmasaudChristian Chervin

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