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Wang P, Zhang M, Zhao SF, Zhang ZR, Liu GL, Chi Z, Chi ZM. Liamocins overproduction via the two-pH stage fermentation and anti-Aspergillus flavus activity of Massoia lactone. Biotechnol J 2024; 19:e2300675. [PMID: 38404053 DOI: 10.1002/biot.202300675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/15/2023] [Accepted: 01/02/2024] [Indexed: 02/27/2024]
Abstract
Aureobasidium melanogenum was found to be grown the best at the constant pH 7.0 and to produce the highest amount of liamocins at the constant pH 3.0. Therefore, the wild type strain A. melanogenum 9-1 and the engineered strain V33 constructed in the laboratory were grown at the constant pH 7.0 for 48 h, then, they were continued to be cultivated at the constant pH 3.0. Under such conditions, A. melanogenum 9-1 produced 36.51 ± 0.55 g L-1 of liamocin and its cell mass was 27.43 ± 0.63 and 6.00 ± 0.11 g L-1 of glucose was left in the finished medium within 168 h while the engineered strain V33 secreted 70.86 ± 2.04 g L-1 of liamocin, its cell mass was 31.63 ± 0.74 g L-1 , 0.16 ± 0.01 g L-1 of glucose was maintained in the finished medium. Then, Massoia lactone was released from the produced liamocins. The released Massoia lactone loaded in the nanoemulsions could be used to actively damage cell wall and cell membrane of both spores and mycelia of Aspergillus flavus, leading to its cell necrosis. Massoia lactone loaded in the nanoemulsions also actively inhibited cell growth of A. flavus, its conidia production and aflatoxin biosynthesis on peanuts, indicating that Massoia lactone loaded in the nanoemulsions had highly potential application in controlling cell growth of A. flavus and aflatoxin biosynthesis in foods and feedstuffs.
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Affiliation(s)
- Peng Wang
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Mei Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Shou-Feng Zhao
- Department of Clinical Laboratory, Qingdao Municipal Hospital, Qingdao, Shandong, China
| | - Zhao-Rui Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Guang-Lei Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Zhe Chi
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Zhen-Ming Chi
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Zhang M, Wei X, Wang P, Chi Z, Liu GL, Chi ZM. Liamocin biosynthesis is induced by an autogenous host acid activation in Aureobasidium melanogenum. Biotechnol J 2024; 19:e2200440. [PMID: 37740661 DOI: 10.1002/biot.202200440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 09/13/2023] [Accepted: 09/22/2023] [Indexed: 09/24/2023]
Abstract
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 was 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 a 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.
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Affiliation(s)
- Mei Zhang
- College of Marine Life Science, Ocean University of China, Qingdao, China
| | - Xin Wei
- College of Marine Life Science, Ocean University of China, Qingdao, China
| | - Peng Wang
- College of Marine Life Science, Ocean University of China, Qingdao, China
| | - Zhe Chi
- College of Marine Life Science, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Guang-Lei Liu
- College of Marine Life Science, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Zhen-Ming Chi
- College of Marine Life Science, Ocean University of China, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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Hansali K, Zhang ZR, Liu GL, Chi Z, Chi ZM. The Pathogenic Yeast Metschnikowia bicuspidata var. bicuspidata in the Aquacultured Ecosystem and Its Biocontrol. J Fungi (Basel) 2023; 9:1024. [PMID: 37888280 PMCID: PMC10607588 DOI: 10.3390/jof9101024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/16/2023] [Accepted: 10/16/2023] [Indexed: 10/28/2023] Open
Abstract
M. bicuspidata var. bicuspidata is a pathogenic yeast which can affect aquacultured and marine-cultured animals such as brine shrimp, ridgetail white prawn, chinook salmon, giant freshwater prawn, the Chinese mitten crab, marine crab, the mud crab, the mangrove land crab, the Chinese grass shrimp, sea urchins, sea urchins, Daphnia dentifera and even snails, causing a milky disease, and it has caused big economic losses in aquacultural and marine-cultural industries in the past. However, the detailed mechanisms and the reasons for the milky disease in the diseased aquatic animals are still completely unknown. So far, only some antimycotics, killer toxins and Massoia lactone haven been found to be able to actively control and kill its growth. The ecofriendly, green and renewable killer toxins and Massoia lactone have high potential for application in controlling the milky disease.
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Affiliation(s)
- Khalef Hansali
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao 266003, China
| | - Zhao-Rui Zhang
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao 266003, China
| | - Guang-Lei Liu
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao 266003, China
| | - Zhe Chi
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao 266003, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
| | - Zhen-Ming Chi
- College of Marine Life Sciences, Ocean University of China, Yushan Road, No. 5, Qingdao 266003, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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Lakhdari W, Benyahia I, Bouhenna MM, Bendif H, Khelafi H, Bachir H, Ladjal A, Hammi H, Mouhoubi D, Khelil H, Alomar TS, AlMasoud N, Boufafa N, Boufahja F, Dehliz A. Exploration and Evaluation of Secondary Metabolites from Trichoderma harzianum: GC-MS Analysis, Phytochemical Profiling, Antifungal and Antioxidant Activity Assessment. Molecules 2023; 28:5025. [PMID: 37446686 DOI: 10.3390/molecules28135025] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/07/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
In this study, we investigated in vitro the potential of Trichoderma harzianum to produce bioactive secondary metabolites that can be used as alternatives to synthetic compounds. The study focused on analyzing two extracts of T. harzianum using ethyl acetate and n-butanol solvents with different polarities. The extracts were examined using phytochemical analysis to determine the content of polyphenols, flavonoids, tannins, and alkaloids. Thin-layer chromatography (TLC) and Gas chromatography-mass spectroscopy (GC-MS) analysis were used to profile volatile organic metabolites (VOCs) present in the extracts. Furthermore, the extracts were tested for their antifungal ability using the poison food technique. For measuring antioxidant activity, the 1,1-diphenyl-2-picryl-hydrazyl (DPPH) test was used. Trichoderma harzianum was shown to have a significantly high content of tannins and alkaloids, with a noticeable difference between the two extracts. GC-MS analysis identified 33 potential compounds with numerous benefits that could be used in agriculture and the medicinal industry. Moreover, strong antifungal activity was identified against Sclerotinia sclerotiorum by 94.44%, Alternaria sp. by 77.04%, and Fusarium solani by 51.48; similarly, the IC50 of antioxidant activity was estimated for ethyl acetate extract by 71.47% and n-butanol extract by 56.01%. This leads to the conclusion that Trichoderma harzianum VOCs play a significant role as an antifungal and antioxidant agent when taking into account the advantageous bioactive chemicals noted in the extracts. However, to our knowledge, this is the first study in Algeria presenting detailed phytochemical analysis and GC-MS profiling of Trichoderma harzianum for two extracts, ethyl acetate and n-butanol.
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Affiliation(s)
- Wassima Lakhdari
- National Institute of Agronomic Research of Algeria, Touggourt 30200, Algeria
- Valcore Laboratory, Biology Department, Faculty of Life and Nature Sciences, University of Boumerdes, Boumerdes 35000, Algeria
| | - Ibtissem Benyahia
- Laboratory of Biogeochemistry and Desert Environments, Department of Chemistry, Faculty of Mathematics and Material Sciences, University of Kasdi Merbah, Ouargla 30000, Algeria
| | - Mustapha Mounir Bouhenna
- Scientific and Technical Center of Research in Physical and Chemical Analysis (CRAPC), Bou-Ismail 42004, Algeria
| | - Hamdi Bendif
- Department of Natural and Life Sciences, Faculty of Science, University of M'sila, M'sila 28000, Algeria
| | - Hafida Khelafi
- Valcore Laboratory, Biology Department, Faculty of Life and Nature Sciences, University of Boumerdes, Boumerdes 35000, Algeria
| | - Hakim Bachir
- Division of Hydraulic and Bioclimatology, National Institute of Agronomic Research (INRA), Algers 16000, Algeria
| | - Amel Ladjal
- Valcore Laboratory, Biology Department, Faculty of Life and Nature Sciences, University of Boumerdes, Boumerdes 35000, Algeria
| | - Hamida Hammi
- National Institute of Agronomic Research of Algeria, Touggourt 30200, Algeria
| | | | | | - Taghrid S Alomar
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84427, Riyadh 11671, Saudi Arabia
| | - Najla AlMasoud
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84427, Riyadh 11671, Saudi Arabia
| | | | - Fehmi Boufahja
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Abderrahmene Dehliz
- National Institute of Agronomic Research of Algeria, Touggourt 30200, Algeria
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Production of liamocins by Aureobasidium spp. with potential applications. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhang M, Wang Z, Chi Z, Liu GL, Chi ZM. Metabolic engineering of Aureobasidium melanogenum 9-1 for overproduction of liamocins by enhancing supply of acetyl-CoA and ATP. Microbiol Res 2022; 265:127172. [DOI: 10.1016/j.micres.2022.127172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/09/2022] [Accepted: 08/14/2022] [Indexed: 11/16/2022]
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