Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid

After perception of specific biotic or abiotic stimuli, such as root colonization by rhizobacteria or selected chemicals, plants can enhance their basal resistance against pathogens. Due to its likely sustainability, this induced resistance will be valuable for disease management in agriculture. Thi...

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Autores principales:	Fares Bellameche, Mohammed Abbas Jasim, Brigitte Mauch-Mani, Fabio Mascher
Formato:	article
Lenguaje:	EN
Publicado:	Firenze University Press 2021
Materias:	Leaf rust callose deposition hydrogen peroxide (H2O2) plant resistance inducers Botany QK1-989
Acceso en línea:	https://doaj.org/article/47fb05ff5baf49e59449917227714dd9
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spelling	oai:doaj.org-article:47fb05ff5baf49e59449917227714dd92021-11-16T09:30:22ZHistopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid10.36253/phyto-131230031-94651593-2095https://doaj.org/article/47fb05ff5baf49e59449917227714dd92021-11-01T00:00:00Zhttps://oajournals.fupress.net/index.php/pm/article/view/13123https://doaj.org/toc/0031-9465https://doaj.org/toc/1593-2095After perception of specific biotic or abiotic stimuli, such as root colonization by rhizobacteria or selected chemicals, plants can enhance their basal resistance against pathogens. Due to its likely sustainability, this induced resistance will be valuable for disease management in agriculture. This study examined resistance against wheat leaf rust (Puccinia triticina) induced by Pseudomonas protegens CHA0 (CHA0) and β-aminobutyric acid (BABA). Seed dressing with CHA0 reduced the number of sporulating pustules on leaves, and expression of resistance was visible as necrotic or chlorotic leaf flecks. Beneficial effect of CHA0 on wheat seedlings growth was observed in when they were challenged or not with leaf rust. BABA was tested at 10, 15 or 20 mM, and a dose-dependent reduction of leaf rust infections was observed with greatest protection at 20 mM. However, BABA treatment repressed plant growth at 20 mM. Balancing the BABA impact on plant growth and its protective capacity, 15 mM of the compound was selected as suitable to protect wheat seedlings against leaf rust, with the least impact on vegetative host growth. Histological aspects of the pathogen infection process was studied to understand mechanisms of behind the observed resistance. The pre-entry process was not affected by the two resistance inducers, but both treatments reduced fungus penetration and haustorium formation. Timing and amplitude of the resistance reactions were different after bacterial or chemical induction, leading to different levels of resistance. During fungal colonization of host tissues, high deposition of callose and accumulation of H2O2 in both CHA0- and BABA-treated plants indicated important contributions to resistance. Fares BellamecheMohammed Abbas JasimBrigitte Mauch-ManiFabio MascherFirenze University PressarticleLeaf rustcallose depositionhydrogen peroxide (H2O2)plant resistance inducersBotanyQK1-989ENPhytopathologia Mediterranea, Vol 60, Iss 3 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Leaf rust callose deposition hydrogen peroxide (H2O2) plant resistance inducers Botany QK1-989
spellingShingle	Leaf rust callose deposition hydrogen peroxide (H2O2) plant resistance inducers Botany QK1-989 Fares Bellameche Mohammed Abbas Jasim Brigitte Mauch-Mani Fabio Mascher Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid
description	After perception of specific biotic or abiotic stimuli, such as root colonization by rhizobacteria or selected chemicals, plants can enhance their basal resistance against pathogens. Due to its likely sustainability, this induced resistance will be valuable for disease management in agriculture. This study examined resistance against wheat leaf rust (Puccinia triticina) induced by Pseudomonas protegens CHA0 (CHA0) and β-aminobutyric acid (BABA). Seed dressing with CHA0 reduced the number of sporulating pustules on leaves, and expression of resistance was visible as necrotic or chlorotic leaf flecks. Beneficial effect of CHA0 on wheat seedlings growth was observed in when they were challenged or not with leaf rust. BABA was tested at 10, 15 or 20 mM, and a dose-dependent reduction of leaf rust infections was observed with greatest protection at 20 mM. However, BABA treatment repressed plant growth at 20 mM. Balancing the BABA impact on plant growth and its protective capacity, 15 mM of the compound was selected as suitable to protect wheat seedlings against leaf rust, with the least impact on vegetative host growth. Histological aspects of the pathogen infection process was studied to understand mechanisms of behind the observed resistance. The pre-entry process was not affected by the two resistance inducers, but both treatments reduced fungus penetration and haustorium formation. Timing and amplitude of the resistance reactions were different after bacterial or chemical induction, leading to different levels of resistance. During fungal colonization of host tissues, high deposition of callose and accumulation of H2O2 in both CHA0- and BABA-treated plants indicated important contributions to resistance.
format	article
author	Fares Bellameche Mohammed Abbas Jasim Brigitte Mauch-Mani Fabio Mascher
author_facet	Fares Bellameche Mohammed Abbas Jasim Brigitte Mauch-Mani Fabio Mascher
author_sort	Fares Bellameche
title	Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid
title_short	Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid
title_full	Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid
title_fullStr	Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid
title_full_unstemmed	Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid
title_sort	histopathological aspects of resistance in wheat to puccinia triticina, induced by pseudomonas protegens cha0 and β-aminobutyric acid
publisher	Firenze University Press
publishDate	2021
url	https://doaj.org/article/47fb05ff5baf49e59449917227714dd9
work_keys_str_mv	AT faresbellameche histopathologicalaspectsofresistanceinwheattopucciniatriticinainducedbypseudomonasprotegenscha0andbaminobutyricacid AT mohammedabbasjasim histopathologicalaspectsofresistanceinwheattopucciniatriticinainducedbypseudomonasprotegenscha0andbaminobutyricacid AT brigittemauchmani histopathologicalaspectsofresistanceinwheattopucciniatriticinainducedbypseudomonasprotegenscha0andbaminobutyricacid AT fabiomascher histopathologicalaspectsofresistanceinwheattopucciniatriticinainducedbypseudomonasprotegenscha0andbaminobutyricacid
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Histopathological aspects of resistance in wheat to Puccinia triticina, induced by Pseudomonas protegens CHA0 and β-aminobutyric acid

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