The preservation effect of Metschnikowia pulcherrima yeast on anthracnose of postharvest mango fruits and the possible mechanism

Abstract

This study aimed to determine the effects of yeast on storage quality of 'Tainong' mango, and elucidate it's possible anti-disease mechanism. The results showed that could inhibit the changes in peel colour, fruit firmness, the contents of total soluble solids, total acid and vitamin C, and maintain the storage quality of mango fruits. An investigation of the mechanism showed that competed not only for the primary carbon source, but also for living space with. In addition, promoted the activities of defence-related enzymes, including ß-1,3-glucanase(GLU) and chitinase (CHT), and secreted a small amount of antimicrobial substances composed of volatile and nonvolatile anti-fungal compounds. The results strongly demonstrated that antagonistic yeasta could be applied as a biocontrol agent for deducing the spoilage and decay of mango fruit.

Metschnikowia pulcherrima and Related Pulcherrimin-Producing Yeasts: Fuzzy Species Boundaries and Complex Antimicrobial Antagonism

“…Piano et al [ 74 ] found that addition of nitrates reduced or even totally suppressed the biocontrol activity of the antagonistic strains 2.33 and 4.4 against B. cinerea on apple. Similar suppression of the antagonistic effect was achieved with glucose and fructose (but not sucrose) on mango fruits [ 31 ]. Addition of these two sugars into the wounds of fruits infected with an antagonistic soil-born Metchnikowia strain and the post-harvest pathogen Colletotrichum gloeosporioides drastically increased the size of the disease lesions around the wounds.…”

“…Pulcherrimin-producing Metschnikowia strains are common components of the yeast communities that colonise ripening fruits, flowers (nectar), tree sap fluxes and also frequently occur in fruit juices and fermenting wine (e.g., [ 2 , 3 , 6 , 9 , 12 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]). New yeast isolates producing the characteristic maroon-red pulcherrimin halos around their colonies ( Figure 1 A) are frequently declared to belong to M. pulcherrima without taking into account that M. pulcherrima is not the only pigment-producing Metschnikowia species.…”

Yeast Associated with Rice Phylloplane and Their Contribution to Control of Rice Sheath Blight Disease

“…Reduced efficiency of W. anomalus and S. cerevisiae against Pichia digitatum in orange was obtained from this mechanism [38]. Tian et al [39] reported that Metschnikowia pulcherrima could compete for nutrients under in vivo condition when glucose was added to wounds on mango fruits. Some microorganisms are capable of solubilizing insoluble essential elements such as phosphate and zinc oxide in the environment to their soluble forms, which are subsequently uptaken by plants [21].…”

Yeasts from Different Habitats and Their Potential as Biocontrol Agents

“…Both species have been repeatedly isolated from grapes and other plants [22,[45][46][47][48]. Strains of M. pulcherrima have already been suggested for biocontrol of fungal diseases on apples [49], grapes [39], sweet cherries [18], strawberries [50], mango fruits [51], and even for clinical treatment of mycoses in mammals [52].…”