Penicillium digitatum and Penicillium expansum are two closely related fungal plant pathogens causing green and blue mold in harvested fruit, respectively. The two species differ in their host specificity, being P. digitatum restricted to citrus fruits and P. expansum able to infect a wide range of fruits after harvest. Although host-specific Penicillium species have been found to have a smalle...

Nine oxylipin mimics were designed and synthesized starting from d-mannose. Their antifungal activity against three citrus postharvest pathogens was evaluated by spore germination assay. The results indicated that all the compounds significantly inhibited the growth of Penicillium digitatum, Penicillium italicum and Aspergillus niger. The compound (3Z,6Z,8S,9R,10R)-octadeca-3,6-diene-8,9,10-tri...

ABSTRACT During the infection of citrus fruit by Penicillium digitatum there is little evidence of a host defense response. This suggests that P. digitatum has the ability to suppress host defenses. The current study demonstrates that P. digitatum suppresses a defense-related hydrogen peroxide (H(2)O(2)) burst in host tissue. In contrast, the nonhost pathogen, Penicillium expansum, triggers pro...

Two strains of Penicillium digitatum and one strain of Penicillium italicum were exposed to various levels of sorbic acid and potassium sorbate, and the MICs were determined. Selected strains of the molds were then repeatedly exposed to subinhibitory levels of the compounds to determine whether increased tolerance might develop. The MIC of sorbic acid (pH 4.75) to P. digitatum was between 0.02 ...

Laboratory studies were carried out to isolate, identify and control the fungi associated with fruit rot of tomato (Lycopersicon esculentum). Aspergillus viridae, Penicillium digitatum and Rhizopus sp were isolated from samples collected from Lokoja, Kabba, Okene, Anyigba and Ankpa, all in Kogi State, Nigeria. Plant extracts employed to control the vegetative mycelial growth were from neem (Aza...

BACKGROUND Penicillium species are among the most common fungi present in the environment and are usually considered non-pathogenic to humans. However, in immunocompromised hosts they can be virulent pathogens and can cause death. Penicillium digitatum is a plant pathogen that commonly causes a postharvest fungal disease of citrus called green mould; it very rarely causes systemic mycosis in hu...

In this work we report that volatiles emitted from wounded citrus peel play a major role in host recognition by Penicillium digitatum. Volatiles of various citrus cultivars had a pronounced stimulatory effect on germination and germ tube elongation of green mold pathogen. When exposed to volatiles from grapefruit, the percentage of P. digitatum spores germinated on minimal media was 10-fold hig...

Pathogen aggressiveness on the host was studied as one of the influencing factors in the variability of the efficiency of biocontrol by Pantoea agglomerans. The effect of the relative dose of the pathogen and biocontrol agent (BCA) on efficacy of biocontrol was analyzed in six postharvest pathogens (Rhizopus stolonifer, Botrytis cinerea, Penicillium expansum, Monilinia laxa, Penicillium digitat...