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Author

Kaili Wang

Other affiliations: University of British Columbia
Bio: Kaili Wang is an academic researcher from Jiangsu University. The author has contributed to research in topics: Blue mold & Penicillium expansum. The author has co-authored 1 publications. Previous affiliations of Kaili Wang include University of British Columbia.

Papers
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Journal ArticleDOI
TL;DR: In this article, the progress of research on the blue mold disease caused by P. expansum in apples, including physiological and molecular infection mechanisms, as well as various methods to control this common plant pathogen.
Abstract: One of the most significant challenges associated with postharvest apple deterioration is the blue mold caused by Penicillium expansum, which leads to considerable economic losses to apple production industries. Apple fruits are susceptible to mold infection owing to their high nutrient and water content, and current physical control methods can delay but cannot completely inhibit P. expansum growth. Biological control methods present promising alternatives; however, they are not always cost effective and have application restrictions. P. expansum infection not only enhances disease pathogenicity, but also inhibits the expression of host-related defense genes. The implementation of new ways to investigate and control P. expansum are expected with the advent of omics technology. Advances in these techniques, together with molecular biology approaches such as targeted gene deletion and whole genome sequencing, will lead to a better understanding of the P. expansum infectious machinery. Here, we review the progress of research on the blue mold disease caused by P. expansum in apples, including physiological and molecular infection mechanisms, as well as various methods to control this common plant pathogen.

13 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article , the authors used contact glow discharge electrolysis (CGDE) to inactivate the fungal spores of P. expansum in clarified apple juice and achieved a 3.71 log inactivation of spores in the juice.
Abstract: Penicillium expansum spores in apple juice were treated with contact glow discharge electrolysis (CGDE), and the effect of different parameters on the efficiency of spore inactivation and the related mechanism were investigated. We found that CGDE effectively inactivated spores of P. expansum in the clarified apple juice. CGDE achieved a 3.71 log inactivation of spores in the juice with 1 cm electrode gap, at 520 V, and discharge time for 15 min. CGDE produced hydrogen peroxide in the juice, and the concentration reached 58.1 mg/L after discharged for 30 min. CGDE destroyed the integrity of the cell membrane in the spores, and reduced the activities of superoxide dismutase, catalase, and peroxidase by 68.1%, 81.8%, and 68.0% after discharged for 30 min. In addition, CGDE inhibited mycelial growth, reduced colony diameter by 18.9%, and decreased the lesion diameter by 41.4% in apples surface-inoculated with P. expansum. Taken together, CGDE could inactivate the spores of P. expansum in apple juice by inducing reactive oxygen species accumulation and disrupting the integrity of cell membrane of spores. CGDE can effectively inactivate the spores of P. expansum in apple juice. The device of CGDE is composed of a high voltage DC power supply, electrodes and a reaction vessel, which is connected easily with material pipeline, and suitable for handling liquids. Therefore, CGDE can be applicated in treating liquids contaminated with fungal spores in the food industry.

5 citations

Journal ArticleDOI
TL;DR: In this article , Salicylic acid (SA) was encapsulated in β-cyclodextrin (β-CD) via the host-guest inclusion complexation method, and the efficacy of SA microcapsules (SAM) against blue mold caused by Penicillium expansum in postharvest apple fruit was elucidated.
Abstract: Salicylic acid (SA) is a natural inducer of disease resistance in fruit, but its application in the food industry is limited due to low water solubility. Here, SA was encapsulated in β-cyclodextrin (β-CD) via the host–guest inclusion complexation method, and the efficacy of SA microcapsules (SAM) against blue mold caused by Penicillium expansum in postharvest apple fruit was elucidated. It was observed that SAM was the most effective in inhibiting the mycelial growth of P. expansum in vitro. SAM was also superior to SA for control of blue mold under in vivo conditions. Enzyme activity analysis revealed that both SA and SAM enhanced the activities of superoxide dismutase (SOD) and phenylalanine ammonia lyase (PAL) in apple fruit, whereas SAM led to higher SOD activities than SA. Total phenolic contents in the SAM group were higher than those in the SA group at the early stage of storage. SAM also improved fruit quality by retarding firmness loss and maintaining higher total soluble solids (TSS) contents. These findings indicate that microcapsules can serve as a promising formulation to load SA for increasing P. expansum inhibition activity and improving quality attributes in apple fruit.

2 citations

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TL;DR: In this paper , Debaryomyces hansenii F9D was used to prevent fungal decay in apples by biocontrol yeasts during cold storage of fruit.

1 citations

Journal ArticleDOI
TL;DR: In this paper , the authors assessed the biocontrol efficacy of the antagonistic yeast, Debaryomyces hansenii , enhanced by alginate oligosaccharide (AOS) in controlling the postharvest decay of apples and studied the possible physiological mechanisms involved in this process.

1 citations

Journal ArticleDOI
TL;DR: In this article , the authors evaluated the induced resistance of ferulic acid against blue mold of apples (cv. Qiujin) as well as the mechanism involved in its action, and found that 1.0 g L−1 ferilic acid remarkably reduced lesion diameter of Penicillium expansum-inoculated apples and colony diameter in vitro.

1 citations