Aureobasidium spp. and their applications in biotechnology

Wang, Peng; Jia, Shu-Lei; Liu, Guanglei; Chi, Zhe

doi:10.1016/j.procbio.2022.03.006

Cited by 21 publications

(17 citation statements)

References 128 publications

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“…Aureobasidium species possess different enzymatic patterns closely related to biotechnological and agricultural uses [ 302 ]. These features favour their culture and employment as biocontrol agents against pathogenic fungi and pests [ 303 ].…”

Section: Aureobasidium Spp: Multitasking Beneficial Microorg...mentioning

confidence: 99%

“…These fungi use extracellular enzymes to convert proteins, carbohydrates, and fats into antibiotics, organic acids, and other metabolites [ 304 ]. Within the Aureobasidium genus, several fast-growth, dimorphic fungi have poly-extremotolerant properties and produce mainly yeast-like cells involved in melanin wall deposits and are therefore called “black yeasts” [ 303 ]. The most widespread species is A. melanogenum , followed by A. pullulans .…”

Section: Aureobasidium Spp: Multitasking Beneficial Microorg...mentioning

confidence: 99%

“…Aureobasidium spp. can synthesise different enzyme patterns, depending on species and strains [ 303 ]. A. melanogenum produces pullulan, which is involved in resistance to environmental stresses such as UV radiation, high salt concentration, desiccation, strong oxidation, and heat.…”

Section: Aureobasidium Spp: Multitasking Beneficial Microorg...mentioning

confidence: 99%

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“Ectomosphere”: Insects and Microorganism Interactions

et al. 2023

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This study focuses on interacting with insects and their ectosymbiont (lato sensu) microorganisms for environmentally safe plant production and protection. Some cases help compare ectosymbiont microorganisms that are insect-borne, -driven, or -spread relevant to endosymbionts’ behaviour. Ectosymbiotic bacteria can interact with insects by allowing them to improve the value of their pabula. In addition, some bacteria are essential for creating ecological niches that can host the development of pests. Insect-borne plant pathogens include bacteria, viruses, and fungi. These pathogens interact with their vectors to enhance reciprocal fitness. Knowing vector-phoront interaction could considerably increase chances for outbreak management, notably when sustained by quarantine vector ectosymbiont pathogens, such as the actual Xylella fastidiosa Mediterranean invasion episode. Insect pathogenic viruses have a close evolutionary relationship with their hosts, also being highly specific and obligate parasites. Sixteen virus families have been reported to infect insects and may be involved in the biological control of specific pests, including some economic weevils. Insects and fungi are among the most widespread organisms in nature and interact with each other, establishing symbiotic relationships ranging from mutualism to antagonism. The associations can influence the extent to which interacting organisms can exert their effects on plants and the proper management practices. Sustainable pest management also relies on entomopathogenic fungi; research on these species starts from their isolation from insect carcasses, followed by identification using conventional light or electron microscopy techniques. Thanks to the development of omics sciences, it is possible to identify entomopathogenic fungi with evolutionary histories that are less-shared with the target insect and can be proposed as pest antagonists. Many interesting omics can help detect the presence of entomopathogens in different natural matrices, such as soil or plants. The same techniques will help localize ectosymbionts, localization of recesses, or specialized morphological adaptation, greatly supporting the robust interpretation of the symbiont role. The manipulation and modulation of ectosymbionts could be a more promising way to counteract pests and borne pathogens, mitigating the impact of formulates and reducing food insecurity due to the lesser impact of direct damage and diseases. The promise has a preventive intent for more manageable and broader implications for pests, comparing what we can obtain using simpler, less-specific techniques and a less comprehensive approach to Integrated Pest Management (IPM).

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Section: Aureobasidium Spp: Multitasking Beneficial Microorg...mentioning

confidence: 99%

Section: Aureobasidium Spp: Multitasking Beneficial Microorg...mentioning

confidence: 99%

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“Ectomosphere”: Insects and Microorganism Interactions

et al. 2023

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“…Aureobasidium pullulans is well‐known melanin‐producing microorganism that produces this pigment both intra‐ and extracellularly 7 . A. pullulans synthesize 1,8‐dihydroxy naphthalene (DHN)‐melanin from acetyl‐coenzyme A via polyketide pathway 8 …”

Section: Introductionmentioning

confidence: 99%

“…7 A. pullulans synthesize 1,8-dihydroxy naphthalene (DHN)-melanin from acetyl-coenzyme A via polyketide pathway. 8 Food or agricultural by-products/wastes are alternative low-cost substrate sources for melanin production to prevent environmental pollution and contribute to the world economy. 9 One of the food industry wastes is carrot peel.…”

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confidence: 99%

Experimental modeling and optimization of melanin production by Aureobasidium pullulansNBRC 100716 in carrot peel extract

Müjdeci

2022

Env Prog and Sustain Energy

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The objective of this study was to optimize the fermentation parameters by using Response Surface Methodology for increasing melanin production in carrot peel extract by Aureobasidium pullulans NBRC 100716. The optimum conditions for melanin production by A. pullulans NBRC 100716 in carrot peel extract were determined as; the initial pH of the fermentation medium: 5.9, temperature: 29.9 C, agitation rate: 120 rpm, and fermentation time: 15 days. The estimated intracellular (Y 1 ), extracellular (Y 2 ), and total (Y 3 ) melanin concentrations in optimum conditions were 2.44 ± 0.05, 1.95 ± 0.47, and 4.22 ± 0.74 g/L, respectively. As a result of confirmation experiments, the observed values of Y 1 , Y 2 , and Y 3 were 2.23, 1.83, and 4.06 g/L, respectively. The optimization of melanin production conditions by A. pullulans NBRC 100716 caused an almost one-fold increase in total melanin concentration. Besides, using carrot peel extract as an inexpensive substrate source for the production of high value-added melanin, the optimization of the fermentation conditions is beneficial for the production of this product.

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Liamocin biosynthesis is induced by an autogenous host acid activation in Aureobasidium melanogenum

Zhang,

Wei,

Wang

et al. 2023

Biotechnology Journal

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It has been known that maximal liamocin production must be carried out at low environmental pH (around 3.0). In this study, it was found that the low pH was mainly caused by the secreted citric acid which is one precursor of acetyl‐CoA for liamocin biosynthesis. Determination of citric acid in the culture, deletion, complementation and overexpression of the CEXA gene encoding specific citrate exporter demonstrated that the low pH was indeed caused by the secreted citric acid. Deletion, complementation and overexpression of the ACL gene encoding ATP‐citric acid lyase and effects of different initial pHs and added citric acid showed that the low pH in the presence of citric acid were suitable for lysis of intracellular citric acid, liamocin production and expression of the PACC gene encoding the pH signaling transcription factor PacC. This meant that the PACC gene was an acid‐expression gene. Deletion, complementation and overexpression of the PACC gene indicated that expression of the key gene cluster GAL1‐EST1‐PKS1 for liamocin biosynthesis was driven by the pH signaling transcription factor PacC and there was weak nitrogen catabolite repression on liamocin biosynthesis at the low pH. That was why liamocin biosynthesis was induced at the low pH in the presence of citric acid. The mechanisms of the enhanced liamocin biosynthesis by the autogenous host acid activation, together with the pH signaling pathway, were proposed.This article is protected by copyright. All rights reserved

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Aureobasidium spp. and their applications in biotechnology

Cited by 21 publications

References 128 publications

“Ectomosphere”: Insects and Microorganism Interactions

“Ectomosphere”: Insects and Microorganism Interactions

Experimental modeling and optimization of melanin production by Aureobasidium pullulansNBRC 100716 in carrot peel extract

Liamocin biosynthesis is induced by an autogenous host acid activation in Aureobasidium melanogenum

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