Bioefficacy of fungal chitin oligomers in the control of postharvest decay in tomato fruit

Valle-Sotelo, E. G. and Troncoso-Rojas, R. and Tiznado-Hernández, M. E. and Carvajal-Millán, E. and Sánchez-Estrada, A. and Henry García, Y. (2022) Bioefficacy of fungal chitin oligomers in the control of postharvest decay in tomato fruit. International Food Research Journal (Malaysia), 29. pp. 1131-1142. ISSN 2231 7546

Tomato is one of the most commercialised and consumed fruits worldwide. However, tomatoes are highly susceptible to Alternaria rot. Among the safe strategies proposed to control Alternaria rot is the induction of defence mechanisms through biological elicitors, such as chitin. Chitin and its oligosaccharides are an activate plant defence mechanisms, but studies of fruits exposed to fungal chitin fragments are scarce. Therefore, the present work aimed to obtain and partially characterise chitin oligomers of Alternaria alternata, and evaluate their effect on the defence mechanism of tomato fruits and their tolerance to Alternaria rot. The chitin oligomers obtained had a molecular weight of ≤ 1 kDa, 12% Nacetyl-glucosamine, 0.2% residual protein, and were 94% acetylated. These oligomers markedly increased the enzymatic activity of chitinase and β-1,3-glucanase in tomato fruits, and the development of Alternaria rot was inhibited by 78%. Chitin oligomers of A. alternata represent a promising alternative to attenuate Alternaria rot in tomato fruits through an enzymatic defence mechanism.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/29%20(05)%202022/15%20-...

Abstract

Tomato is one of the most commercialised and consumed fruits worldwide. However, tomatoes are highly susceptible to Alternaria rot. Among the safe strategies proposed to control Alternaria rot is the induction of defence mechanisms through biological elicitors, such as chitin. Chitin and its oligosaccharides are an activate plant defence mechanisms, but studies of fruits exposed to fungal chitin fragments are scarce. Therefore, the present work aimed to obtain and partially characterise chitin oligomers of Alternaria alternata, and evaluate their effect on the defence mechanism of tomato fruits and their tolerance to Alternaria rot. The chitin oligomers obtained had a molecular weight of ≤ 1 kDa, 12% Nacetyl-glucosamine, 0.2% residual protein, and were 94% acetylated. These oligomers markedly increased the enzymatic activity of chitinase and β-1,3-glucanase in tomato fruits, and the development of Alternaria rot was inhibited by 78%. Chitin oligomers of A. alternata represent a promising alternative to attenuate Alternaria rot in tomato fruits through an enzymatic defence mechanism.

[error in script]

Item Type:	Article
AGROVOC Term:	Solanum lycopersicum
AGROVOC Term:	tomatoes
AGROVOC Term:	chitin
AGROVOC Term:	protein content
AGROVOC Term:	statistical methods
AGROVOC Term:	plant health
AGROVOC Term:	economic impact
Geographical Term:	Mexico
Depositing User:	Nor Hasnita Abdul Samat
Date Deposited:	09 Sep 2024 04:22
Last Modified:	09 Sep 2024 04:22
URI:	http://webagris.upm.edu.my/id/eprint/151

Actions (login required)

View Item