Chitosan and oligochitosan enhance ginger (Zingiber officinale Roscoe) resistance to rhizome rot caused by Fusarium oxysporum in storage

Automatic periodical SO 2 fumigation improves the storage quality of tender ginger

“…During storage at 14°C for 50 days, the decay rate of tender ginger in the control group was 26.9%, while that of tender ginger treated with SO 2 was only 16.3%, 5.2%, and 4.9%, respectively, significantly lower than that in the control group. Obviously, the effect was more obvious with higher SO 2 concentration and there was not much difference between 0.5 and 1.0 ml L −1 SO 2 in antiseptic treatment, which was related to the fact that fumigating tender ginger with appropriate concentration of SO 2 could effectively kill fungal pathogens including Fusarium oxysporum causing rhizome rot (Liu et al., 2016). In addition, SO 2 fumigation can also cause physiological response to stress of tender ginger tissue, induce disease resistance and enhance its defense capability.…”

Potencial de biocontrole das leveduras em pós-colheita de citros pela produção da enzima ²-1,3-glucanase e atividade killer: uma revisão

“…Endo-β-1,3-glucanase e endoquitinase, conhecida como PR2 e PR3, têm a capacidade de hidrolisar diretamente paredes celulares de fungos patógenos por clivagem de ligações β em locais aleatórios ao longo da cadeia de polissacarídeos, libertam assim o β-1,3-glucano e a quitina compostos de oligossacarídeos que então estimulam as respostas de defesa do hospedeiro (Liu et al, 2016, Spadaro & Droby, 2016.…”

Evaluation of the Physicochemical Properties of Chitosans in Inducing the Defense Response of Coffea arabica against the Fungus Hemileia vastatrix

“…When recognized by the plant, it causes changes that include a massive complex of diverse biochemical reactions: oxidative burst reactions, occurrence of free radicals, fatty acid oxidation, membrane transmissibility changes, synthesis of proteins and other substances that strengthen the cell wall, phytoalexin formation, enzyme activation, especially oxidoreductases (peroxidases, lipoxygenases, polyphenol oxidases) and phenylalanine ammonium lyase, and the synthesis of pathogen-induced proteins and protease inhibitors [8]. Importantly, host-stimulating compounds are produced at concentrations that effectively inhibit the ability of pathogens to infect [9].…”

“…Chitosan has shown its activity as a defense inducer in crops such as rubber trees [5], ginger [9], eggplant [10], tea plants [11], grape vines [12], and Arabidopsis thaliana [13], activating plant defense mechanisms and protecting against pathogens.…”