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Induction of disease resistance and ROS metabolism in navel oranges by chitosan

Identifieur interne : 001C72 ( Main/Exploration ); précédent : 001C71; suivant : 001C73

Induction of disease resistance and ROS metabolism in navel oranges by chitosan

Auteurs : KAIFANG ZENG [République populaire de Chine, États-Unis] ; YUYAN DENG [République populaire de Chine] ; JIAN MING [République populaire de Chine] ; LILI DENG [République populaire de Chine]

Source :

Scientia horticulturae [ 0304-4238 ] ; 2010.

RBID : Pascal:10-0456702

Descripteurs français

Pascal (Inist)
- Résistance induite, Métabolisme, Décomposition, Horticulture, Citrus sinensis, Orange, Chitosane, Résistance aux maladies.
Wicri :
- topic : Horticulture.

English descriptors

KwdEn :
- Chitosan, Citrus sinensis, Decomposition, Disease resistance, Horticulture, Induced resistance, Metabolism, Orange.

Abstract

The objective of this work was to evaluate how disease resistance and reactive oxygen species (ROS) metabolism in harvested navel oranges (Citrus sinensis L. Osbeck) may be affected by chitosan. Fresh navel oranges were treated with 2% chitosan or 0.5% glacial acetic acid (control) solution for 1 min, and some were inoculated with Penicillium italicum and Penicillium digitatum. Then, the fruit were stored at 20 C and 85-95% RH. Treatment with 2% chitosan significantly reduced the disease incidence and the lesion diameter compared with control fruit. This treatment effectively enhanced the activities of peroxidase (POD) and superoxide dismutase (SOD), and levels of glutathione (GSH) and hydrogen peroxide (H₂O₂), inhibited the activities of catalase (CAT) and the decreases of ascorbate (AsA) content during navel orange fruits storage. Ascorbate peroxidase (APX) activity in the navel orange fruit was induced slightly by the chitosan treatment during 14-21 days storage. However, glutathione reductase (GR) activity in the fruit was not enhanced by the chitosan treatment. These results indicated that chitosan treatment could induce the navel orange fruit disease resistance by regulating the H₂O₂ levels, antioxidant enzyme and ascorbate-glutathione cycle.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The objective of this work was to evaluate how disease resistance and reactive oxygen species (ROS) metabolism in harvested navel oranges (Citrus sinensis L. Osbeck) may be affected by chitosan. Fresh navel oranges were treated with 2% chitosan or 0.5% glacial acetic acid (control) solution for 1 min, and some were inoculated with Penicillium italicum and Penicillium digitatum. Then, the fruit were stored at 20 C and 85-95% RH. Treatment with 2% chitosan significantly reduced the disease incidence and the lesion diameter compared with control fruit. This treatment effectively enhanced the activities of peroxidase (POD) and superoxide dismutase (SOD), and levels of glutathione (GSH) and hydrogen peroxide (H<sub>2</sub>
O<sub>2</sub>
), inhibited the activities of catalase (CAT) and the decreases of ascorbate (AsA) content during navel orange fruits storage. Ascorbate peroxidase (APX) activity in the navel orange fruit was induced slightly by the chitosan treatment during 14-21 days storage. However, glutathione reductase (GR) activity in the fruit was not enhanced by the chitosan treatment. These results indicated that chitosan treatment could induce the navel orange fruit disease resistance by regulating the H<sub>2</sub>
O<sub>2</sub>
 levels, antioxidant enzyme and ascorbate-glutathione cycle.</div>
</front>
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Induction of disease resistance and ROS metabolism in navel oranges by chitosan

Induction of disease resistance and ROS metabolism in navel oranges by chitosan

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri