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Zhou D, Jing T, Chen Y, Yun T, Qi D, Zang X, Zhang M, Wei Y, Li K, Zhao Y, Wang W, Xie J. Biocontrol potential of a newly isolated Streptomyces sp. HSL-9B from mangrove forest on postharvest anthracnose of mango fruit caused by Colletotrichum gloeosporioides. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Aguirre-Güitrón L, Calderón-Santoyo M, Lagarón JM, Prieto C, Ragazzo-Sánchez JA. Formulation of the biological control yeast Meyerozyma caribbica by electrospraying process: effect on postharvest control of anthracnose in mango (Mangifera indica L.) and papaya (Carica papaya L.). JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:696-706. [PMID: 34173241 DOI: 10.1002/jsfa.11400] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/16/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Microorganism for biological control of fruit diseases is an eco-friendly alternative to the use of chemical fungicides. RESULTS This is the first study evaluating the electrospraying process to encapsulate the biocontrol yeast Meyerozyma caribbica. The effect of encapsulating material [Wey protein concentrate (WPC), Fibersol® and Trehalose], its concentration and storage temperature on the cell viability of M. caribbica, and in vitro and in vivo control of Colletotrichum gloeosporioides was evaluated. The processing with commercial resistant maltodextrin (Fibersol®) 30% (w/v) as encapsulating material showed the highest initial cell viability (95.97 ± 1.01%). The storage at 4 ± 1 °C showed lower losses of viability compared to 25 ± 1 °C. Finally, the encapsulated yeast with Fibersol 30% w/v showed inhibitory activity against anthracnose in the in vitro and in vivo tests, similar to yeast fresh cells. CONCLUSION Electrospraying was a highly efficient process due to the high cell viability, and consequently, a low quantity of capsules is required for the postharvest treatment of fruits. Additionally, the yeast retained its antagonistic power during storage. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Lizet Aguirre-Güitrón
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Tepic, Mexico
| | - Montserrat Calderón-Santoyo
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Tepic, Mexico
| | | | - Cristina Prieto
- Novel Materials and Nanotechnology Group, IATA-CSIC, Valencia, Spain
| | - Juan Arturo Ragazzo-Sánchez
- Laboratorio Integral de Investigación en Alimentos, Tecnológico Nacional de México/Instituto Tecnológico de Tepic, Tepic, Mexico
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Ramlawi S, Abusharkh S, Carroll A, McMullin DR, Avis TJ. Biological and chemical characterization of antimicrobial activity in Arthrobacter spp. isolated from disease-suppressive compost. J Basic Microbiol 2021; 61:745-756. [PMID: 34228381 DOI: 10.1002/jobm.202100213] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/12/2021] [Accepted: 06/18/2021] [Indexed: 01/06/2023]
Abstract
Antagonistic bacteria can act as biocontrol agents against various phytopathogens. Recently, Arthrobacter spp. demonstrated antifungal activity, but were not further characterized. In this study, the antimicrobial activity of Arthrobacter humicola strains M9-1A, M9-2, and M9-8, and Arthrobacter psychrophenolicus strain M9-17 were evaluated against nine plant pathogens in vitro, and their cell-free filtrates were additionally assessed for inhibition of Alternaria alternata and suppression of black mold disease on tomato fruit. Results indicated that A. humicola M9-1A and A. psychrophenolicus M9-17 were the most inhibitory, reducing growth of seven of the pathogens studied. Cell-free filtrates of A. psychrophenolicus M9-17 reduced the growth of most pathogens. All cell-free bacterial filtrates, except those from A. humicola M9-2, suppressed black mold on tomato fruit. Disk diffusion assays with ethyl acetate soluble culture filtrate extracts of all bacteria reduced the mycelial growth of A. alternata. Clear inhibition zones were observed for A. psychrophenolicus M9-17 extracts using drop bioassays. The antifungal compound N-acetyltryptamine was purified and characterized from the A. psychrophenolicus M9-17 cell-free ethyl acetate soluble extract. This study suggests that antibiosis may play a key role in the antimicrobial activity of Arthrobacter spp.
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Affiliation(s)
- Serine Ramlawi
- Department of Chemistry, Carleton University, Ontario, Canada
| | | | - Alexa Carroll
- Department of Chemistry, Carleton University, Ontario, Canada
| | - David R McMullin
- Department of Chemistry, Carleton University, Ontario, Canada.,Institute of Biochemistry, Carleton University, Ontario, Canada
| | - Tyler J Avis
- Department of Chemistry, Carleton University, Ontario, Canada.,Institute of Biochemistry, Carleton University, Ontario, Canada
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Control of the rubber anthracnose fungus Colletotrichum gloeosporioides using culture filtrate extract from Streptomyces deccanensis QY-3. Antonie van Leeuwenhoek 2020; 113:1573-1585. [PMID: 32815093 DOI: 10.1007/s10482-020-01465-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/10/2020] [Indexed: 12/24/2022]
Abstract
Colletotrichum gloeosporioides is a main cause of rubber anthracnose, which results in a huge loss for the natural rubber industry. In this study, an actinomycete strain QY-3 was isolated and had good antagonistic activity against C. gloeosporioides with an inhibition rate of 86.6%. Strain QY-3 was identified as Streptomyces deccanensis preliminarily. Millet medium was selected as the optimal fermentation broth for antifungal metabolites production by S. deccanensis QY-3. The culture filtrate extract (CFE) from the millet broth of S. deccanensis QY-3 exhibits broad-spectrum antifungal activity against plant pathogenic fungi, and its EC50 inhibiting the mycelial growth of C. gloeosporioides is 6.3 μg/mL. The CFE has good thermal and pH stabilities, and it can break the hyphae and inhibit the conidial germination of C. gloeosporioides. 100 μg/mL of CFE had an obvious control effect on rubber anthracnose, and the control efficacy was 63.7% on 5 days after inoculation. Two compounds with inhibitory effects on C. gloeosporioides, anthranilic acid and sangivamycin, were isolated from the CFE. The MICs of both compounds against C. gloeosporioides were 29.3 and 23.0 μg/mL respectively. In conclusion, the CFE from S. deccanensis QY-3 has great potential to be a promising fungicide for rubber anthracnose.
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Zhang K, Gu L, Zhang Y, Liu Z, Li X. Dinactin from a new producer, Streptomyces badius gz-8, and its antifungal activity against the rubber anthracnose fungus Colletotrichum gloeosporioides. Microbiol Res 2020; 240:126548. [PMID: 32653809 DOI: 10.1016/j.micres.2020.126548] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/24/2020] [Accepted: 07/03/2020] [Indexed: 10/23/2022]
Abstract
Colletotrichum gloeosporioides is a main cause of rubber anthracnose, which results in very large losses for the natural rubber industry. In this study, an actinomycete strain gz-8 was isolated and had strong antagonistic activity against C. gloeosporioides, with an inhibition rate of 72.5 %. Strain gz-8 was identified as Streptomyces badius. Three active compounds were separated from S. badius gz-8 and identified as feigrisolide B, feigrisolide C and dinactin according to the mass spectrometry and NMR-spectra results. In the three compounds, dinactin exhibited the best antifungal activity against C. gloeosporioides, with an EC50 value of 2.55 μg/mL, and its minimum inhibitory concentration was 44 μg/mL. Dinactin had broad inhibitory activities against nine other pathogenic fungi, and it also had an obvious control effect on rubber anthracnose comparable to that of chlorothalonil. Dinactin could inhibit the conidiogenesis and spore germination of C. gloeosporioides. This report will contribute to understanding the antifungal activity of dinactin against C. gloeosporioides.
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Affiliation(s)
- Kai Zhang
- School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Liushuang Gu
- School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Yuefeng Zhang
- School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China
| | - Zhiqiang Liu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China; School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China.
| | - Xiaoyu Li
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China; School of Life and Pharmaceutical Sciences, Hainan University, Haikou, China.
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Gao K, Chu W, Sun J, Mao X. Identification of an alkaline lipase capable of better enrichment of EPA than DHA due to fatty acids selectivity and regioselectivity. Food Chem 2020; 330:127225. [PMID: 32569931 DOI: 10.1016/j.foodchem.2020.127225] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 05/15/2020] [Accepted: 06/01/2020] [Indexed: 01/17/2023]
Abstract
The whole genome of Streptomyces violascens (=ATCC 27968) was sequenced and the cloning and expression of OUC-Lipase 6 were conducted in Bacillus subtilis WB800. The recombinant enzyme belongs to the lipolytic enzymes family V. OUC-Lipase 6 showed optimal activity at 30 °C and pH 9.0, and retained 90.2% of its activity in an alkaline buffer (pH 8.0, 30 °C and 96 h). OUC-Lipase 6 showed good stability under medium temperature conditions (residual activity of 68.8%, pH 8.0, 45 °C and 96 h). OUC-Lipase 6 could selectively hydrolyze fatty acids on the glyceride backbone, thus improving the contents of DHA and EPA in codfish oil. OUC-Lipase 6 also showed regioselectivity, resulting in a better enrichment efficiency for EPA than DHA. After hydrolyzing for 36 h via OUC-Lipase 6, the contents of EPA and DHA were improved to 3.24-fold and 1.98-fold, respectively.
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Affiliation(s)
- Kunpeng Gao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Wenqin Chu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Jianan Sun
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Xiangzhao Mao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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Zhen H, Qian X, Fu X, Chen Z, Zhang A, Shi L. Regulation of Shaoyao Ruangan Mixture on Intestinal Flora in Mice With Primary Liver Cancer. Integr Cancer Ther 2019; 18:1534735419843178. [PMID: 31006277 PMCID: PMC6477757 DOI: 10.1177/1534735419843178] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Background: Shaoyao Ruangan mixture (SRM) has been applied
clinically for more than 20 years in Zhejiang Cancer Hospital to treat patients
with primary liver cancer (PLC). Intestinal microecology plays an important role
in the emergence of liver diseases. This study aimed to reveal connections among
SRM, intestinal microbiota and PLC, and the potential targets of SRM for liver
cancer. Methods: We established a control group, a PLC model group,
and a treatment group of mice to analyze the inhibitory effect of SRM on PLC and
its intestinal flora target. We also evaluated drug efficacy of SRM and analyzed
specific changes in intestinal flora by 16S rDNA sequencing of stools. As the
serum interleukin (IL)-10 level could be an independent prognostic factor for
unresectable liver cancer, we detected IL-10 levels and analyzed their
association with the abundance of specific bacteria. Results: Liver
tumors in the treatment group were smaller and fewer than those in the model
group (P = .046). The abundance of Bacteroides
was significantly higher in the model group than that in the control group,
while SRM significantly reduced the increasing abundance of
Bacteroides in mice with PLC. We found that the IL-10 level
was positively correlated with the abundance of Bacteroides.
Conclusion: SRM can effectively inhibit the progression of PLC
and increase Bacteroides abundance. In view of the association
between Bacteroides and liver cancer and the significant
positive correlation between Bacteroides and IL-10 levels,
Bacteroides may be the target intestinal flora of SRM to
inhibit PLC.
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Affiliation(s)
- Hongde Zhen
- Second Clinical Medical College,
Zhejiang Chinese Medical University, Hangzhou, People’s Republic of China
- Zhejiang Cancer Hospital, Hangzhou,
People’s Republic of China
| | - Xiang Qian
- Zhejiang Cancer Hospital, Hangzhou,
People’s Republic of China
| | - Xiaoxuan Fu
- Second Clinical Medical College,
Zhejiang Chinese Medical University, Hangzhou, People’s Republic of China
| | - Zhuo Chen
- Second Clinical Medical College,
Zhejiang Chinese Medical University, Hangzhou, People’s Republic of China
| | - Aiqin Zhang
- Zhejiang Cancer Hospital, Hangzhou,
People’s Republic of China
| | - Lei Shi
- Zhejiang Cancer Hospital, Hangzhou,
People’s Republic of China
- Lei Shi, Department of Mammary Oncology,
Zhejiang Cancer Hospital, No. 1 East Banshan Road, Gongshu District, Hangzhou
310022, People’s Republic of China.
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Two Carotane Sesquiterpenoids from Gymnopus sp. 0612-9 Against Penicillium italicum and P. digitatum, Which Decay Postharvest Citrus. Chem Nat Compd 2019. [DOI: 10.1007/s10600-019-02832-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Moraes Bazioli J, Belinato JR, Costa JH, Akiyama DY, Pontes JGDM, Kupper KC, Augusto F, de Carvalho JE, Fill TP. Biological Control of Citrus Postharvest Phytopathogens. Toxins (Basel) 2019; 11:toxins11080460. [PMID: 31390769 PMCID: PMC6723504 DOI: 10.3390/toxins11080460] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 07/24/2019] [Accepted: 07/25/2019] [Indexed: 01/09/2023] Open
Abstract
Citrus are vulnerable to the postharvest decay caused by Penicillium digitatum, Penicillium italicum, and Geotrichum citri-aurantii, which are responsible for the green mold, blue mold, and sour rot post-harvest disease, respectively. The widespread economic losses in citriculture caused by these phytopathogens are minimized with the use of synthetic fungicides such as imazalil, thiabendazole, pyrimethanil, and fludioxonil, which are mainly employed as control agents and may have harmful effects on human health and environment. To date, numerous non-chemical postharvest treatments have been investigated for the control of these pathogens. Several studies demonstrated that biological control using microbial antagonists and natural products can be effective in controlling postharvest diseases in citrus, as well as the most used commercial fungicides. Therefore, microbial agents represent a considerably safer and low toxicity alternative to synthetic fungicides. In the present review, these biological control strategies as alternative to the chemical fungicides are summarized here and new challenges regarding the development of shelf-stable formulated biocontrol products are also discussed.
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Affiliation(s)
- Jaqueline Moraes Bazioli
- Institute of Chemistry, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil
- Faculty of Pharmaceutical Sciences, Universidade Estadual de Campinas, 13083-859 Campinas, SP, Brazil
| | - João Raul Belinato
- Institute of Chemistry, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil
| | - Jonas Henrique Costa
- Institute of Chemistry, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil
| | - Daniel Yuri Akiyama
- Institute of Chemistry, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil
| | | | | | - Fabio Augusto
- Institute of Chemistry, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil
| | - João Ernesto de Carvalho
- Faculty of Pharmaceutical Sciences, Universidade Estadual de Campinas, 13083-859 Campinas, SP, Brazil
| | - Taícia Pacheco Fill
- Institute of Chemistry, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil.
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