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Induced Resistance in Tomato Plants against Verticillium Wilt by the Binuclear Nickel Coordination Complex of the Ligand 2,5-Bis(pyridin-2-yl)-1,3,4-thiadiazole.

Identifieur interne : 000022 ( Main/Exploration ); précédent : 000021; suivant : 000023

Induced Resistance in Tomato Plants against Verticillium Wilt by the Binuclear Nickel Coordination Complex of the Ligand 2,5-Bis(pyridin-2-yl)-1,3,4-thiadiazole.

Auteurs : Hanane Zine [Maroc] ; Lalla Aicha Rifai [Maroc] ; Mohamed Faize [Maroc] ; Fouad Bentiss [Maroc] ; Salaheddine Guesmi [Maroc] ; Abdelhakim Laachir [Maroc] ; Amal Smaili [Maroc] ; Kacem Makroum [Maroc] ; Abdelaziz Sahibed-Dine [Maroc] ; Tayeb Koussa [Maroc]

Source :

RBID : pubmed:26991972

English descriptors

Abstract

Verticillium wilt caused by Verticillium dahliae is a major limiting factor for tomato production. The objective of this study was to evaluate the effectiveness of ligand 2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole (L) and its complex bis[μ-2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole-κ(4)N(2),N(3):N(4),N(5)]bis[dihydrato-κO)nickel(II)] as activators of plant defenses in controlling Verticillium wilt. In the greenhouse, they protected tomato plants against V. dahliae when they were applied twice as foliar sprays at 100 μg mL(-1). A synergistic effect was observed between the ligand L and the transition metal Ni, with disease incidence reduced by 38% with L and 57% with Ni2L2. Verticillium wilt foliar symptoms and vascular browning index were reduced by 82% for L and 95% for Ni2L2. This protection ability was associated with the induction of an oxidative burst and the activation of the total phenolic content as well as potentiation of the activity of peroxidase and polyphenol oxidase. These results demonstrated that L and Ni2L2 can be considered as new activators of plant defense responses.

DOI: 10.1021/acs.jafc.6b00151
PubMed: 26991972


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<div type="abstract" xml:lang="en">Verticillium wilt caused by Verticillium dahliae is a major limiting factor for tomato production. The objective of this study was to evaluate the effectiveness of ligand 2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole (L) and its complex bis[μ-2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole-κ(4)N(2),N(3):N(4),N(5)]bis[dihydrato-κO)nickel(II)] as activators of plant defenses in controlling Verticillium wilt. In the greenhouse, they protected tomato plants against V. dahliae when they were applied twice as foliar sprays at 100 μg mL(-1). A synergistic effect was observed between the ligand L and the transition metal Ni, with disease incidence reduced by 38% with L and 57% with Ni2L2. Verticillium wilt foliar symptoms and vascular browning index were reduced by 82% for L and 95% for Ni2L2. This protection ability was associated with the induction of an oxidative burst and the activation of the total phenolic content as well as potentiation of the activity of peroxidase and polyphenol oxidase. These results demonstrated that L and Ni2L2 can be considered as new activators of plant defense responses.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Maroc</li>
</country>
</list>
<tree>
<country name="Maroc">
<noRegion>
<name sortKey="Zine, Hanane" sort="Zine, Hanane" uniqKey="Zine H" first="Hanane" last="Zine">Hanane Zine</name>
</noRegion>
<name sortKey="Bentiss, Fouad" sort="Bentiss, Fouad" uniqKey="Bentiss F" first="Fouad" last="Bentiss">Fouad Bentiss</name>
<name sortKey="Faize, Mohamed" sort="Faize, Mohamed" uniqKey="Faize M" first="Mohamed" last="Faize">Mohamed Faize</name>
<name sortKey="Guesmi, Salaheddine" sort="Guesmi, Salaheddine" uniqKey="Guesmi S" first="Salaheddine" last="Guesmi">Salaheddine Guesmi</name>
<name sortKey="Koussa, Tayeb" sort="Koussa, Tayeb" uniqKey="Koussa T" first="Tayeb" last="Koussa">Tayeb Koussa</name>
<name sortKey="Laachir, Abdelhakim" sort="Laachir, Abdelhakim" uniqKey="Laachir A" first="Abdelhakim" last="Laachir">Abdelhakim Laachir</name>
<name sortKey="Makroum, Kacem" sort="Makroum, Kacem" uniqKey="Makroum K" first="Kacem" last="Makroum">Kacem Makroum</name>
<name sortKey="Rifai, Lalla Aicha" sort="Rifai, Lalla Aicha" uniqKey="Rifai L" first="Lalla Aicha" last="Rifai">Lalla Aicha Rifai</name>
<name sortKey="Sahibed Dine, Abdelaziz" sort="Sahibed Dine, Abdelaziz" uniqKey="Sahibed Dine A" first="Abdelaziz" last="Sahibed-Dine">Abdelaziz Sahibed-Dine</name>
<name sortKey="Smaili, Amal" sort="Smaili, Amal" uniqKey="Smaili A" first="Amal" last="Smaili">Amal Smaili</name>
</country>
</tree>
</affiliations>
</record>

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