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Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6

Increased tolerance of crops to low oxygen (hypoxia) during flooding is a key target for food security. In Arabidopsis thaliana (L.) Heynh., the N‐end rule pathway of targeted proteolysis controls plant responses to hypoxia by regulating the stability of group VII ethylene response factor (ERFVII) t...

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Autores principales: Mendiondo, Guillermina M., Gibbs, Daniel J., Szurman‐Zubrzycka, Miriam, Korn, Arnd, Marquez, Julietta, Szarejko, Iwona, Maluszynski, Miroslaw, King, John, Axcell, Barry, Smart, Katherine, Corbineau, Francoise, Holdsworth, Michael J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5098238/
https://www.ncbi.nlm.nih.gov/pubmed/25657015
http://dx.doi.org/10.1111/pbi.12334
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author Mendiondo, Guillermina M.
Gibbs, Daniel J.
Szurman‐Zubrzycka, Miriam
Korn, Arnd
Marquez, Julietta
Szarejko, Iwona
Maluszynski, Miroslaw
King, John
Axcell, Barry
Smart, Katherine
Corbineau, Francoise
Holdsworth, Michael J.
author_facet Mendiondo, Guillermina M.
Gibbs, Daniel J.
Szurman‐Zubrzycka, Miriam
Korn, Arnd
Marquez, Julietta
Szarejko, Iwona
Maluszynski, Miroslaw
King, John
Axcell, Barry
Smart, Katherine
Corbineau, Francoise
Holdsworth, Michael J.
author_sort Mendiondo, Guillermina M.
collection PubMed
description Increased tolerance of crops to low oxygen (hypoxia) during flooding is a key target for food security. In Arabidopsis thaliana (L.) Heynh., the N‐end rule pathway of targeted proteolysis controls plant responses to hypoxia by regulating the stability of group VII ethylene response factor (ERFVII) transcription factors, controlled by the oxidation status of amino terminal (Nt)‐cysteine (Cys). Here, we show that the barley (Hordeum vulgare L.) ERFVII BERF1 is a substrate of the N‐end rule pathway in vitro. Furthermore, we show that Nt‐Cys acts as a sensor for hypoxia in vivo, as the stability of the oxygen‐sensor reporter protein MCGGAIL‐GUS increased in waterlogged transgenic plants. Transgenic RNAi barley plants, with reduced expression of the N‐end rule pathway N‐recognin E3 ligase PROTEOLYSIS6 (HvPRT6), showed increased expression of hypoxia‐associated genes and altered seed germination phenotypes. In addition, in response to waterlogging, transgenic plants showed sustained biomass, enhanced yield, retention of chlorophyll, and enhanced induction of hypoxia‐related genes. HvPRT6 RNAi plants also showed reduced chlorophyll degradation in response to continued darkness, often associated with waterlogged conditions. Barley Targeting Induced Local Lesions IN Genomes (TILLING) lines, containing mutant alleles of HvPRT6, also showed increased expression of hypoxia‐related genes and phenotypes similar to RNAi lines. We conclude that the N‐end rule pathway represents an important target for plant breeding to enhance tolerance to waterlogging in barley and other cereals.
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spelling pubmed-50982382016-11-09 Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6 Mendiondo, Guillermina M. Gibbs, Daniel J. Szurman‐Zubrzycka, Miriam Korn, Arnd Marquez, Julietta Szarejko, Iwona Maluszynski, Miroslaw King, John Axcell, Barry Smart, Katherine Corbineau, Francoise Holdsworth, Michael J. Plant Biotechnol J Research Articles Increased tolerance of crops to low oxygen (hypoxia) during flooding is a key target for food security. In Arabidopsis thaliana (L.) Heynh., the N‐end rule pathway of targeted proteolysis controls plant responses to hypoxia by regulating the stability of group VII ethylene response factor (ERFVII) transcription factors, controlled by the oxidation status of amino terminal (Nt)‐cysteine (Cys). Here, we show that the barley (Hordeum vulgare L.) ERFVII BERF1 is a substrate of the N‐end rule pathway in vitro. Furthermore, we show that Nt‐Cys acts as a sensor for hypoxia in vivo, as the stability of the oxygen‐sensor reporter protein MCGGAIL‐GUS increased in waterlogged transgenic plants. Transgenic RNAi barley plants, with reduced expression of the N‐end rule pathway N‐recognin E3 ligase PROTEOLYSIS6 (HvPRT6), showed increased expression of hypoxia‐associated genes and altered seed germination phenotypes. In addition, in response to waterlogging, transgenic plants showed sustained biomass, enhanced yield, retention of chlorophyll, and enhanced induction of hypoxia‐related genes. HvPRT6 RNAi plants also showed reduced chlorophyll degradation in response to continued darkness, often associated with waterlogged conditions. Barley Targeting Induced Local Lesions IN Genomes (TILLING) lines, containing mutant alleles of HvPRT6, also showed increased expression of hypoxia‐related genes and phenotypes similar to RNAi lines. We conclude that the N‐end rule pathway represents an important target for plant breeding to enhance tolerance to waterlogging in barley and other cereals. John Wiley and Sons Inc. 2015-02-06 2016-01 /pmc/articles/PMC5098238/ /pubmed/25657015 http://dx.doi.org/10.1111/pbi.12334 Text en © 2015 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Mendiondo, Guillermina M.
Gibbs, Daniel J.
Szurman‐Zubrzycka, Miriam
Korn, Arnd
Marquez, Julietta
Szarejko, Iwona
Maluszynski, Miroslaw
King, John
Axcell, Barry
Smart, Katherine
Corbineau, Francoise
Holdsworth, Michael J.
Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6
title Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6
title_full Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6
title_fullStr Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6
title_full_unstemmed Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6
title_short Enhanced waterlogging tolerance in barley by manipulation of expression of the N‐end rule pathway E3 ligase PROTEOLYSIS6
title_sort enhanced waterlogging tolerance in barley by manipulation of expression of the n‐end rule pathway e3 ligase proteolysis6
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5098238/
https://www.ncbi.nlm.nih.gov/pubmed/25657015
http://dx.doi.org/10.1111/pbi.12334
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