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Wang C, Chen Y, Chen S, Min Y, Tang Y, Ma X, Li H, Li J, Liu Z. Spraying chitosan on cassava roots reduces postharvest deterioration by promoting wound healing and inducing disease resistance. Carbohydr Polym 2023; 318:121133. [PMID: 37479443 DOI: 10.1016/j.carbpol.2023.121133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/28/2023] [Accepted: 06/16/2023] [Indexed: 07/23/2023]
Abstract
Postharvest damage makes cassava roots vulnerable to pathogen infections and decay, which significantly hinders the development of the cassava industry. The objective of this study was to assess the antibacterial properties of chitosan in vitro, as well as its effect on wound healing and resistance in cassava roots. The findings demonstrated that the bacteriostatic effect of chitosan became increasingly prominent as the concentration of chitosan enhanced. Chitosan at a concentration of 0.5 mg/mL was revealed to significantly inhibit the germination of P. palmivora spores and damage to their structure. Moreover, chitosan activated the transcription of crucial genes and enzyme activities associated with the phenylpropane metabolism pathway in cassava roots, thus promoting rapid lignin accumulation and resulting in the early formation of a fracture layer. Chitosan was also found to enhance cassava root resistance by promoting the expression of pathogenesis-related proteins and the accumulation of flavonoids and total phenols. After 48 h of inoculation, cassava roots treated with chitosan exhibited a 51.4 % and 53.4 % decrease in lesion area for SC9 and SC6 varieties, respectively. The findings of this study offer a novel approach for managing postharvest deterioration of cassava roots.
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Affiliation(s)
- Congcong Wang
- School of Life Sciences, Hainan University, Haikou 570228, China
| | - Yinhua Chen
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, Hainan, China
| | - Songbi Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Hainan, China
| | - Yi Min
- School of Life Sciences, Hainan University, Haikou 570228, China
| | - Yanqiong Tang
- School of Life Sciences, Hainan University, Haikou 570228, China
| | - Xiang Ma
- School of Life Sciences, Hainan University, Haikou 570228, China
| | - Hong Li
- School of Life Sciences, Hainan University, Haikou 570228, China
| | - Juanjuan Li
- School of Life Sciences, Hainan University, Haikou 570228, China
| | - Zhu Liu
- School of Life Sciences, Hainan University, Haikou 570228, China.
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Characterization of heat-treated chitosan cast films and their antimicrobial activity on the growth of natural flora of pasteurized milk. Int J Biol Macromol 2023; 232:123446. [PMID: 36708888 DOI: 10.1016/j.ijbiomac.2023.123446] [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: 11/11/2022] [Revised: 01/12/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
This research aimed to evaluate the physicochemical and biocidal properties of chitosan films obtained through the solvent casting method using two different molecular weights, and thermally treated for an extended time (3 weeks) at 70 °C under vacuum condition (RH 0 %). The effect of storage time (for 30 and 180 days) under ambient conditions (23 °C and RH 40 %) on the properties of heat-treated cast films and their biocidal effectiveness was also assessed. FTIR-ATR, TGA and XRD of resulting films were analyzed to explore the dependency of antibacterial performance on the alteration in molecular and chemical structure. The results demonstrated that the solubility of treated films at 70 °C was proportionally reduced, resulting from the reduction of protonated amines and an increase in crystallinity. Likewise, increasing storage time led to a significant lowering in the solubilization of cast films. It was found that the solubilized fraction of chitosan cast films is the active fraction with the biocide behavior that can act against bacteria. In addition, the effectiveness of migrated chitosan was examined against the natural flora of pasteurized milk, such as Paenibacillus and Pseudomonas fluorescens. The results showed that cast films obtained from chitosan with lower molecular weight caused a reduction in the total count of viable cells without a significant effect on the properties of milk.
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Luo H, Meng S, Deng Y, Deng Z, Shi H. In vitro antifungal activity of lasiodiplodin, isolated from endophytic fungus Lasiodiplodia pseudotheobromae J-10 associated with Sarcandra glabra and optimization of culture conditions for lasiodiplodin production. Arch Microbiol 2023; 205:140. [PMID: 36964826 DOI: 10.1007/s00203-023-03440-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 03/26/2023]
Abstract
A macrolide antibiotic, lasiodiplodin was isolated from the endophytic fungus (EF) Lasiodiplodia pseudotheobromae J-10 associated with the medicinal plant Sarcandra glabra. In vitro antifungal assay demonstrated the inhibitory activity of lasiodiplodin against the growth of six phytopathogenic fungi, with the IC50 values ranging between 15.50 and 52.30 μg/mL. The highest antifungal activities were recorded against Exserohilum turcicum, Colletotrichum capsici, and Pestalotiopsis theae, with IC50 values of 15.50, 15.90, and 17.55 μg/mL, respectively. The underlying mechanism of the antifungal activity of lasiodiplodin against E. turcicum included the alteration of its colony morphology and disturbance of its cell membrane integrity. In addition, the optimization of L. pseudotheobromae J-10 culture conditions increased lasiodiplodin yield to 52.33 mg/L from 0.59 mg/L at pre-optimization. This is the first report on the isolation and identification of antifungal compound from the EF L. pseudotheobromae J-10 associated with S. glabra, as well as on the optimization of L. pseudotheobromae J-10 culture conditions to increase lasiodiplodin yield. The results of this study support that lasiodiplodin is a natural compound with high potential bioactivity against phytopathogens, and provide a basis for further study of the EF associated with S. glabra.
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Affiliation(s)
- Haiyu Luo
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education-Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University, 1 Yanzhong Road, Yanshan District, Guilin, 541006, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, 541006, Guangxi, China
- Institute for Sustainable Development and Innovation, Guangxi Normal University, Guilin, 541006, Guangxi, China
| | - Siyu Meng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education-Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University, 1 Yanzhong Road, Yanshan District, Guilin, 541006, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, 541006, Guangxi, China
- Institute for Sustainable Development and Innovation, Guangxi Normal University, Guilin, 541006, Guangxi, China
| | - Yecheng Deng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education-Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University, 1 Yanzhong Road, Yanshan District, Guilin, 541006, Guangxi, China.
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, 541006, Guangxi, China.
- Institute for Sustainable Development and Innovation, Guangxi Normal University, Guilin, 541006, Guangxi, China.
| | - Zhiyong Deng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education-Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University, 1 Yanzhong Road, Yanshan District, Guilin, 541006, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, 541006, Guangxi, China
- Institute for Sustainable Development and Innovation, Guangxi Normal University, Guilin, 541006, Guangxi, China
| | - Huilu Shi
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education-Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University, 1 Yanzhong Road, Yanshan District, Guilin, 541006, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, 541006, Guangxi, China
- Institute for Sustainable Development and Innovation, Guangxi Normal University, Guilin, 541006, Guangxi, China
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4
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Ji H, Wang J, Chen F, Fan N, Wang X, Xiao Z, Wang Z. Meta-analysis of chitosan-mediated effects on plant defense against oxidative stress. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158212. [PMID: 36028025 DOI: 10.1016/j.scitotenv.2022.158212] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/15/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Chitosan, as a natural non-toxic biomaterial, has been demonstrated to enhance plant defense against oxidative stress. However, the general pattern and mechanism of how chitosan application modifies the amelioration of oxidative stress in plants have not been elucidated yet. Herein, we performed a meta-analysis of 58 published articles up to January 2022 to fill this knowledge gap, and found that chitosan application significantly increased the antioxidant enzyme activity (by 40.6 %), antioxidant metabolites content (by 24.6 %), defense enzyme activity (by 77.9 %), defense-related genes expression (by 103.2 %), phytohormones (by 26.9 %), and osmotic regulators (by 23.2 %) under stress conditions, which in turn notably reduced oxidative stress (by 32.2 %), and increased plant biomass (by 28.1 %) and yield (by 15.7 %). Moreover, chitosan-mediated effects on the amelioration of oxidative stress depended on the properties and application methods of chitosan. Our findings provide a comprehensive understanding of the mechanism of chitosan-alleviated oxidative stress, which would promote the application of chitosan in plant protection in agriculture.
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Affiliation(s)
- Haihua Ji
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China
| | - Jinghong Wang
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China
| | - Feiran Chen
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China
| | - Ningke Fan
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China
| | - Xie Wang
- Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
| | - Zhenggao Xiao
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China.
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China
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Identification of the Pathogen Causing Leaf Spot in Zinnia elegans and Its Sensitivity to Five Fungicides. Pathogens 2022; 11:pathogens11121454. [PMID: 36558787 PMCID: PMC9783861 DOI: 10.3390/pathogens11121454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/15/2022] [Accepted: 11/23/2022] [Indexed: 12/02/2022] Open
Abstract
Zinnia elegans Jacq. is an important, globally cultivated ornamental plant. In August 2021, a leaf spot disease was observed in zinnia in Shibing County, Guizhou, China, with an incidence of approximately 60%. Pathogens were isolated and purified from the infected leaves by tissue isolation, and pathogen strain BRJ2 was confirmed as the pathogen causing the leaf spot. Based on morphology and ITS, TEF-1α, and TUB2 sequence analyses, the pathogen was identified as Nigrospora musae (McLennan and Hoëtte). The mycelial growth rate method was used to determine the in vitro toxicity of five fungicides to the pathogen. The results showed that 10% difenoconazole provided the strongest inhibitory effect on N. musae, with a concentration for 50% of maximal effect (EC50) of 0.0658 mg/L; 75% trifloxystrobin·tebuconazole had the second greatest effect, with an EC50 of 0.1802 mg/L. This study provides the first report that N. musae caused leaf spot disease in Z. elegans and provides important guidance for the effective prevention and control of this disease in Guizhou.
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6
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El-araby A, El Ghadraoui L, Errachidi F. Usage of biological chitosan against the contamination of post-harvest treatment of strawberries by Aspergillus niger. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.881434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Developing bioactive food packaging, capable of extending the shelf life of fruits, has received increasing attention in recent years. The present study highlights the interest in post-harvest treatment for strawberries with chitosan as a preservation solution. Chitosan extraction was carried out from shrimp shells (Parapenaeus longirostris), composed of chitin, using citric acid during the demineralization step. Extracted chitosan was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The presence of amino group (-NH2) in the obtained chitosan was confirmed by infrared (IR) spectral data. Deacetylation degree (DD), which has a value of 80.86%, was determined by FTIR spectra. X-ray diffraction pattern (XRD) showed two peaks of crystalline character, characteristic of extracted chitosan, approximately at 20° and 30° (2θ). Extracted chitosan morphology was studied by scanning electron microscopy (SEM) and showed a relatively smooth top surface and fibrous structures. Chitosan, acetic acid, and their interaction effects were evaluated on Aspergillus niger mycelial growth strain isolated from spoiled strawberries. Chitosan revealed a strong anti-fungal activity, dose-dependent (from 0 to 3%), on Aspergillus niger mycelial growth, while acetic acid showed moderate anti-fungal activity against the Aspergillus niger strain. Agri-food application was carried out using chitosan solubilized in acetic acid as a post-harvest treatment tool for the prolongation of shelf life of strawberries (by using an experimental design). Coating, with the developed preservative solution, significantly reduced microbial spoilage in strawberries. Treated strawberries retained their initial pigmentation for a longer period when compared to untreated strawberries. The treatment carried out maintained the cellular structures of treated strawberries during the storage period and thus extended the shelf life of strawberries which is considered very susceptible to reduce post-harvest losses.
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Mode of action of nanochitin whisker against Fusarium pseudograminearum. Int J Biol Macromol 2022; 217:356-366. [PMID: 35839953 DOI: 10.1016/j.ijbiomac.2022.07.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 07/03/2022] [Accepted: 07/08/2022] [Indexed: 11/22/2022]
Abstract
Nanochitin whisker (NC) is an advanced nanobiomaterial with novel physicochemical and biological properties. Fusarium pseudograminearum (Fpg) is an important pathogenic fungus causing wheat crown rot disease. This study explored the mode of action of NC against Fpg as a target microorganism. The effects of different treatments and concentrations of NC on the fungal growth and conidial germination were investigated by in vitro bioassay. The impacts of NC on cell structure integrity, membrane permeability, pathogenesis related key enzymes activity, and the mycotoxin production were examined by electron microscopy, fluorescence spectroscopy, IR spectroscopy, conductometry, and spectrophotometry, respectively. The results showed that NC significantly reduced hyphal growth, and the spore germination rate of Fpg declined by 33.0 % and 23.2 % when Fpg was treated with 30 and 300 μg/mL of NC, respectively. NC vigorously influenced structural stability of cell wall by destroying dextran structure, and strongly stimulated ergosterol production altering membrane integrity of the fungus. It reduced the activities of enzymes related to energy-supply like nicotinamide adenine dinucleotide oxidase and succinate dehydrogenase remarkably. The production of fungal mycotoxin deoxynivalenol was also decreased by NC. These findings provide an important basis for fully understanding the mechanism of nanobiomaterial in plant fungal disease control.
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8
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Li Y, Wang X, Yang X, Wu X, Wang Z, Zhao Y, Lin C, Yu S, Wang G, Zhou H. Effect of the odour compound from Periploca sepium Bunge on the physiological and biochemical indices, photosynthesis and ultrastructure of the leaves of Humulus scandens (Lour.) Merr. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 238:113556. [PMID: 35489293 DOI: 10.1016/j.ecoenv.2022.113556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 04/17/2022] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
Natural odour compounds could be a potential alternative to synthetic herbicides. The odour compound of Periploca sepium Bunge, named 2-hydroxy-4-methoxy-benzaldehyde (HMB), is a herbicidal compound. However, its herbicidal mechanism is unclear. In this experiment, the physiological and biochemical indices, ultrastructure, and photosynthetic function of the leaves of Humulus scandens (Lour.) Merr. treated by HMB were assessed to elucidate the herbicidal mechanism. The results of physiological and biochemical indices are as follows: First, after 4 h of treatment with 2.5 and 5.0 mg/mL, the damage rates in the membrane permeation assay were 74.7% and 89.1%, respectively. Second, compared to the negative control group, multiple physiological and biochemical indices of the two treated groups were changed, including catalase content (-18.5 and -26.5 ng/mL), superoxide dismutase content (-27.4 and -56.6 ng/mL), peroxidase content (382.0 and 880.0 ng/mL), reactive oxygen species content (16.7 and 27.2 ng/mL), malondialdehyde content (8.9 and 25.2 nmol/g), and water potential values (0.2 and 0.3 MPa), except for the photosynthetic pigment contents (chlorophyll a, b, and carotene). Furthermore, the results of transmission electron microscopy showed that the organelles in the mesophyll tissue cells disappeared and severe plasmolysis led to cell atrophy after 4 h of treatment. There were fewer starch granules after 24 h of treatment, but there was no obvious abnormality in the upper and lower epidermal cells. The results of photosynthetic function showed that in the light response, the net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), and stomatal limitation value of the tested leaves were lower than those of the negative control group by 26.6 μmol·m-2·s-1, 7.7 mmol·m-2·s-1, 0.9 mol·m-2·s-1, and 0.2, respectively. However, the intercellular CO2 concentration (Ci) increased and was higher than the air CO2 concentration. In the CO2 response, the Pn, Tr and Gs of the tested leaves first increased and then decreased, but the Ci value continuously increased and finally reached 1727.5 μmol·mol-1. It is obvious that HMB may have inhibited the effect on the photosynthetic system of the tested leaves. Overall, HMB killed the weeds by destroying the structure and multiple physiological functions of the tested leaves.
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Affiliation(s)
- Yan Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences/Guizhou Provincial Engineering Research Center for Natural Drugs, Guiyang 550014, China.
| | - Xiaxia Wang
- College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, China
| | - Xue Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences/Guizhou Provincial Engineering Research Center for Natural Drugs, Guiyang 550014, China
| | - Xiaomei Wu
- Department of Medicine, Yan'an Vocational & Technical Institute, Yanan 716000, China
| | - Ziyi Wang
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Yuanyuan Zhao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences/Guizhou Provincial Engineering Research Center for Natural Drugs, Guiyang 550014, China
| | - Chunming Lin
- Instrumental Analysis & Research Center, South China Agricultural University, Guangzhou 510642, China
| | - Shuang Yu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences/Guizhou Provincial Engineering Research Center for Natural Drugs, Guiyang 550014, China
| | - Guanghui Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences/Guizhou Provincial Engineering Research Center for Natural Drugs, Guiyang 550014, China
| | - Hongjing Zhou
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences/Guizhou Provincial Engineering Research Center for Natural Drugs, Guiyang 550014, China
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Chen J, Ran F, Shi J, Chen T, Zhao Z, Zhang Z, He L, Li W, Wang B, Chen X, Wang W, Long Y. Identification of the Causal Agent of Brown Leaf Spot on Kiwifruit and Its Sensitivity to Different Active Ingredients of Biological Fungicides. Pathogens 2022; 11:673. [PMID: 35745527 PMCID: PMC9229313 DOI: 10.3390/pathogens11060673] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/03/2022] [Accepted: 06/08/2022] [Indexed: 02/04/2023] Open
Abstract
Kiwifruit (Actinidia chinensis) is an important commercial crop in China, and the occurrence of diseases may cause significant economic loss in its production. In the present study, a new pathogen that causes brown leaf spot disease on kiwifruit was reported. The fungus was isolated from an infected sample and identified as Fusarium graminearum based on morphological and molecular evaluation. Koch's postulates were confirmed when the pathogen was re-isolated from plants with artificially induced symptoms and identified as F. graminearum. Based on the biological characteristics of the pathogen, it was determined that: its optimal growth temperature was 25 °C; optimal pH was 7; most suitable carbon source was soluble starch; most suitable nitrogen source was yeast powder; and best photoperiod was 12 h light/12 h dark. Further investigations were conducted by determining 50% effective concentrations (EC50) of several active ingredients of biological fungicides against F. graminearum. The results showed that among the studied fungicides, tetramycin and honokiol had the highest antifungal activity against this pathogen. Our findings provide a scientific basis for the prevention and treatment of brown leaf spot disease on kiwifruit.
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Affiliation(s)
- Jia Chen
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Fei Ran
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Jinqiao Shi
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Tingting Chen
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Zhibo Zhao
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Zhuzhu Zhang
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Linan He
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Wenzhi Li
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Bingce Wang
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Xuetang Chen
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Weizhen Wang
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
| | - Youhua Long
- Research Center for Engineering Technology of Kiwifruit, Institute of Crop Protection, College of Agriculture, Guizhou University, Guiyang 550025, China; (J.C.); (F.R.); (J.S.); (T.C.); (Z.Z.); (Z.Z.); (L.H.); (W.L.); (B.W.); (X.C.); (W.W.)
- Teaching Experimental Field of Guizhou University, Guizhou University, Guiyang 550025, China
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10
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Zhang Y, Pan L, Fang Y, Wang X, Gu S. Inhibition effect of preservatives or disinfectants on
F. concentricum
from postharvest asparagus (
Asparagus officinalis
L.) spear in vitro and in vivo. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.16274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Yuanyuan Zhang
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou PR China
| | - Lixiu Pan
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou PR China
| | - Yonggang Fang
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou PR China
| | - Xiangyang Wang
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou PR China
| | - Shuang Gu
- School of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou PR China
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Antimicrobial Properties of Chitosan and Chitosan Derivatives in the Treatment of Enteric Infections. Molecules 2021; 26:molecules26237136. [PMID: 34885715 PMCID: PMC8659174 DOI: 10.3390/molecules26237136] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/20/2021] [Accepted: 11/23/2021] [Indexed: 12/26/2022] Open
Abstract
Antibiotics played an important role in controlling the development of enteric infection. However, the emergence of antibiotic resistance and gut dysbiosis led to a growing interest in the use of natural antimicrobial agents as alternatives for therapy and disinfection. Chitosan is a nontoxic natural antimicrobial polymer and is approved by GRAS (Generally Recognized as Safe by the United States Food and Drug Administration). Chitosan and chitosan derivatives can kill microbes by neutralizing negative charges on the microbial surface. Besides, chemical modifications give chitosan derivatives better water solubility and antimicrobial property. This review gives an overview of the preparation of chitosan, its derivatives, and the conjugates with other polymers and nanoparticles with better antimicrobial properties, explains the direct and indirect mechanisms of action of chitosan, and summarizes current treatment for enteric infections as well as the role of chitosan and chitosan derivatives in the antimicrobial agents in enteric infections. Finally, we suggested future directions for further research to improve the treatment of enteric infections and to develop more useful chitosan derivatives and conjugates.
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Xu M, Guo J, Li T, Zhang C, Peng X, Xing K, Qin S. Antibiotic Effects of Volatiles Produced by Bacillus tequilensis XK29 against the Black Spot Disease Caused by Ceratocystis fimbriata in Postharvest Sweet Potato. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:13045-13054. [PMID: 34705454 DOI: 10.1021/acs.jafc.1c04585] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Black spot disease caused by Ceratocystis fimbriata is destructive to the production, transportation, and storage of sweet potato. The antifungal effects of Bacillus tequilensis XK29 against C. fimbriata through volatile organic compounds (VOCs) were evaluated in this study. The activated carbon assay proved that XK29 could exert antibiotic effects through volatiles. By optimizing the wheat seed weight, inoculation method, concentration, volume, and time, the antifungal activity of XK29 was significantly improved. XK29 fumigation inhibited spore formation and germination and changed the cell morphology of C. fimbriata. During the storage of sweet potato tuber roots, XK29 effectively controlled black spot disease and reduced the weight loss and malondialdehyde content. Metabolomic analysis revealed that 21 volatile compounds were released from XK29. Isovaleric acid, isobutyric acid, and 2-methylbutanoic acid effectively inhibited the growth of C. fimbriata. These results indicate that B. tequilensis XK29 has a good potential to be developed as a microbial fumigation agent.
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Affiliation(s)
- Mingjie Xu
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, P.R. China
| | - Jianheng Guo
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, P.R. China
| | - Tengjie Li
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, P.R. China
- Wanbang Biopharmaceuticals Group Co., Ltd., Xuzhou 221001, Jiangsu, P.R. China
| | - Chunmei Zhang
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, P.R. China
| | - Xue Peng
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, P.R. China
| | - Ke Xing
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, P.R. China
| | - Sheng Qin
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, P.R. China
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Kumar A, Choudhary A, Kaur H, Mehta S, Husen A. Smart nanomaterial and nanocomposite with advanced agrochemical activities. NANOSCALE RESEARCH LETTERS 2021; 16:156. [PMID: 34664133 PMCID: PMC8523620 DOI: 10.1186/s11671-021-03612-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/06/2021] [Indexed: 05/10/2023]
Abstract
Conventional agriculture solely depends upon highly chemical compounds that have negatively ill-affected the health of every living being and the entire ecosystem. Thus, the smart delivery of desired components in a sustainable manner to crop plants is the primary need to maintain soil health in the upcoming years. The premature loss of growth-promoting ingredients and their extended degradation in the soil increases the demand for reliable novel techniques. In this regard, nanotechnology has offered to revolutionize the agrotechnological area that has the imminent potential over conventional agriculture and helps to reform resilient cropping systems withholding prominent food security for the ever-growing world population. Further, in-depth investigation on plant-nanoparticles interactions creates new avenues toward crop improvement via enhanced crop yield, disease resistance, and efficient nutrient utilization. The incorporation of nanomaterial with smart agrochemical activities and establishing a new framework relevant to enhance efficacy ultimately help to address the social acceptance, potential hazards, and management issues in the future. Here, we highlight the role of nanomaterial or nanocomposite as a sustainable as well stable alternative in crop protection and production. Additionally, the information on the controlled released system, role in interaction with soil and microbiome, the promising role of nanocomposite as nanopesticide, nanoherbicide, nanofertilizer, and their limitations in agrochemical activities are discussed in the present review.
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Affiliation(s)
- Antul Kumar
- Department of Botany, Punjab Agricultural University, Ludhiana, 141004 India
| | - Anuj Choudhary
- Department of Botany, Punjab Agricultural University, Ludhiana, 141004 India
| | - Harmanjot Kaur
- Department of Botany, Punjab Agricultural University, Ludhiana, 141004 India
| | - Sahil Mehta
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067 India
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14
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Current trends and challenges in the synthesis and applications of chitosan-based nanocomposites for plants: A review. Carbohydr Polym 2021; 261:117904. [PMID: 33766382 DOI: 10.1016/j.carbpol.2021.117904] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 01/01/2021] [Accepted: 03/03/2021] [Indexed: 01/09/2023]
Abstract
Chitosan, a low-cost and multipurpose polymer with numerous desired physicochemical and biological properties has been tested for various applications in agriculture, pharmacy, and biomedicine industries. The availability of functional groups along the backbone makes chitosan readily available for other polymers and metal ions to form bio-nanocomposites. Different types of chitosan-based nanocomposites have been designed and tested for the enhancement of chitosan efficiency and ultimately widening the application areas of chitosan in plants. These nanocomposites serve different purposes such as eliciting plant's defence systems against different threats (pathogen attack), antimicrobial agent against bacteria, fungi and viruses, enhancement of nutrient uptake by plants, control release of micro/macronutrients, fungicides and herbicides. In this review, an extensive outlook has been provided (mainly in the last five years) to recent trends and advances in the fabrication and application of chitosan-based composites. Finally, current challenges and future development opportunities of chitosan-based nanocomposites for plants are discussed.
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Zhang Y, Li T, Xu M, Guo J, Zhang C, Feng Z, Peng X, Li Z, Xing K, Qin S. Antifungal effect of volatile organic compounds produced by Pseudomonas chlororaphis subsp. aureofaciens SPS-41 on oxidative stress and mitochondrial dysfunction of Ceratocystis fimbriata. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 173:104777. [PMID: 33771256 DOI: 10.1016/j.pestbp.2021.104777] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/20/2020] [Accepted: 12/22/2020] [Indexed: 05/27/2023]
Abstract
Ceratocystis fimbriata is the pathogen of black rot disease, which widely exists in sweet potato producing areas all over the world. The antifungal activity of volatile organic compounds (VOCs) released by Pseudomonas chlororaphis subsp. aureofaciens SPS-41 against C. fimbriata was reported in our previous study. In this study, we attempted to reveal the underlying antifungal mechanism of SPS-41 volatiles. Our results showed that the VOCs released by SPS-41 caused the morphological change of hyphae, destroyed the integrity of cell membrane, reduced the content of ergosterol, and induced massive accumulation of reactive oxygen species in C. fimbriata cells. Furthermore, SPS-41 fumigation decreased the mitochondrial membrane potential, acetyl-CoA and pyruvate content of C. fimbriata cells, as well as the mitochondrial dehydrogenases activity. In addition, the VOCs generated by SPS-41 reduced the intracellular ATP content and increased the extracellular ATP content of C. fimbriata. In summary, SPS-41 fumigation exerted its antifungal activity by inducing oxidative stress and mitochondrial dysfunction in C. fimbriata.
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Affiliation(s)
- Yu Zhang
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Tengjie Li
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Mingjie Xu
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Jianheng Guo
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Chunmei Zhang
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Zhaozhong Feng
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Xue Peng
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Zongyun Li
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Ke Xing
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China.
| | - Sheng Qin
- School of Life Science, the Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
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16
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Ibrahim E, Luo J, Ahmed T, Wu W, Yan C, Li B. Biosynthesis of Silver Nanoparticles Using Onion Endophytic Bacterium and Its Antifungal Activity against Rice Pathogen Magnaporthe oryzae. J Fungi (Basel) 2020; 6:E294. [PMID: 33217899 PMCID: PMC7712207 DOI: 10.3390/jof6040294] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/13/2020] [Accepted: 11/14/2020] [Indexed: 12/22/2022] Open
Abstract
Biosynthesis of silver nanoparticles (AgNPs) using endophytic bacteria is a safe alternative to the traditional chemical method. The purpose of this research is to biosynthesize AgNPs using endophytic bacterium Bacillus endophyticus strain H3 isolated from onion. The biosynthesized AgNPs with sizes from 4.17 to 26.9 nm were confirmed and characterized by various physicochemical techniques such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), UV-visible spectroscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM) in addition to an energy dispersive spectrum (EDS) profile. The biosynthesized AgNPs at a concentration of 40 μg/mL had a strong antifungal activity against rice blast pathogen Magnaporthe oryzae with an inhibition rate of 88% in mycelial diameter. Moreover, the biosynthesized AgNPs significantly inhibited spore germination and appressorium formation of M. oryzae. Additionally, microscopic observation showed that mycelia morphology was swollen and abnormal when dealing with AgNPs. Overall, the current study revealed that AgNPs could protect rice plants against fungal infections.
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Affiliation(s)
- Ezzeldin Ibrahim
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (E.I.); (T.A.)
- Department of Vegetable Diseases Research, Plant Pathology Research Institute, Agriculture Research Centre, Giza 12916, Egypt
| | - Jinyan Luo
- Department of Plant Quarantine, Shanghai Extension and Service Center of Agriculture Technology, Shanghai 201103, China;
| | - Temoor Ahmed
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (E.I.); (T.A.)
| | - Wenge Wu
- Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001, China;
| | - Chenqi Yan
- Institute of Biotechnology, Ningbo Academy of Agricultural Sciences, Ningbo 315040, China
| | - Bin Li
- State Key Laboratory of Rice Biology, Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (E.I.); (T.A.)
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17
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Caprifico AE, Polycarpou E, Foot PJS, Calabrese G. Biomedical and Pharmacological Uses of Fluorescein Isothiocyanate Chitosan-Based Nanocarriers. Macromol Biosci 2020; 21:e2000312. [PMID: 33016007 DOI: 10.1002/mabi.202000312] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Indexed: 12/26/2022]
Abstract
Chitosan-based nanocarriers (ChNCs) are considered suitable drug carriers due to their ability to encapsulate a variety of drugs and cross biological barriers to deliver the cargo to their target site. Fluorescein isothiocyanate-labeled chitosan-based NCs (FITC@ChNCs) are used extensively in biomedical and pharmacological applications. The main advantage of using FITC@ChNCs consists of the ability to track their fate both intra and extracellularly. This journey is strictly dependent on the physico-chemical properties of the carrier and the cell types under investigation. Other applications make use of fluorescent ChNCs in cell labeling for the detection of disorders in vivo and controlling of living cells in situ. This review describes the use of FITC@ChNCs in the various applications with a focus on understanding their usefulness in labeled drug-delivery systems.
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Affiliation(s)
- Anna E Caprifico
- A. E. Caprifico, Dr. E. Polycarpou, Prof. P. J. S. Foot, Dr. G. Calabrese, Pharmacy and Chemistry, Kingston University London, Penrhyn Road, Kingston upon Thames, KT1 2EE, UK
| | - Elena Polycarpou
- A. E. Caprifico, Dr. E. Polycarpou, Prof. P. J. S. Foot, Dr. G. Calabrese, Pharmacy and Chemistry, Kingston University London, Penrhyn Road, Kingston upon Thames, KT1 2EE, UK
| | - Peter J S Foot
- A. E. Caprifico, Dr. E. Polycarpou, Prof. P. J. S. Foot, Dr. G. Calabrese, Pharmacy and Chemistry, Kingston University London, Penrhyn Road, Kingston upon Thames, KT1 2EE, UK
| | - Gianpiero Calabrese
- A. E. Caprifico, Dr. E. Polycarpou, Prof. P. J. S. Foot, Dr. G. Calabrese, Pharmacy and Chemistry, Kingston University London, Penrhyn Road, Kingston upon Thames, KT1 2EE, UK
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18
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Synthesis, characterization and evaluation of oleoyl-chitosan derivatives as enhancers for ferrous ions nano-delivery using Caco-2 cell model. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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19
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Liu M, Gong Y, Sun H, Zhang J, Zhang L, Sun J, Han Y, Huang J, Wu Q, Zhang C, Li Z. Characterization of a Novel Chitinase from Sweet Potato and Its Fungicidal Effect against Ceratocystis fimbriata. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:7591-7600. [PMID: 32585101 DOI: 10.1021/acs.jafc.0c01813] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Black rot, caused by Ceratocystis fimbriata, is a destructive disease of sweet potatoes (Ipomoea batatas). In this study, a novel chitinase (IbChiA) was screened from sweet potatoes, which showed a remarkably higher expression level in resistant varieties than in susceptible ones after inoculation with C. fimbriata. Sequence analysis indicated that IbChiA belongs to family 19 class II extracellular chitinase with a MW of 26.3 kDa and pI of 5.96. Recombinant IbChiA, produced by Pichia pastoris, displayed antifungal activity and stability. IbChiA could restrain the mycelium extension of C. fimbriata. FDA/PI double staining combined with transmission electron microscopy observation revealed the remarkable fungicidal effect of IbChiA on the conidia of C. fimbriata. The disease symptoms on the surface of slices and tuberous roots of sweet potatoes were significantly reduced after treatment with IbChiA. These results indicated that IbChiA could be used as a potential biofungicide to replace chemical fungicides.
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Affiliation(s)
- Meiyan Liu
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
| | - Ying Gong
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
| | - Houjun Sun
- Jiangsu Xuzhou Sweet Potato Research Center, Xuzhou, Jiangsu Province 221131, China
| | - Jian Zhang
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
| | - Liming Zhang
- Crop Research Institute, Shandong Academy of Agricultural Sciences, Jinan, Shandong Province 250100, China
| | - Jian Sun
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
| | - Yonghua Han
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
| | - Jinjin Huang
- The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
| | - Qian Wu
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
| | - Chengling Zhang
- Jiangsu Xuzhou Sweet Potato Research Center, Xuzhou, Jiangsu Province 221131, China
| | - Zongyun Li
- Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu Province 221116, China
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20
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Li T, Zhang Y, Xu M, Liu Y, Zhang C, Zhang Y, Peng X, Li Z, Qin S, Xing K. Novel antifungal mechanism of oligochitosan by triggering apoptosis through a metacaspase-dependent mitochondrial pathway in Ceratocystis fimbriata. Carbohydr Polym 2020; 245:116574. [PMID: 32718651 DOI: 10.1016/j.carbpol.2020.116574] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 12/16/2022]
Abstract
The antifungal effects of oligochitosan (OCS) against Ceratocystis fimbriata that causes black rot disease in sweet potato and its apoptosis mechanism were evaluated. OCS restrained the mycelial growth and spores germination of C. fimbriata, and decreased the ergosterol content of cell membrane. Transmission electron microscopy observation and flow cytometry analysis revealed that OCS induced morphology changes with smaller size and increased granularity of C. fimbriata, which was the typical feature of apoptosis. To clarify the apoptosis mechanism induced by OCS, a series of apoptosis-related parameters were analyzed. Results showed that OCS induced reactive oxygen species accumulation, Ca2+ homeostasis dysregulation, mitochondrial dysfunction and metacaspase activation, coupled with hallmarks of apoptosis including phosphatidylserine externalization, DNA fragmentation, and nuclear condensation. In summary, OCS triggered apoptosis through a metacaspase-dependent mitochondrial pathway in C. fimbriata. These findings have important implications for the application of OCS to control pathogens in food and agriculture.
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Affiliation(s)
- Tengjie Li
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Yu Zhang
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Mingjie Xu
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Yuanfang Liu
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China; Caoqiao Middle School of Suzhou, Suzhou, 215008, Jiangsu, PR China.
| | - Chunmei Zhang
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Yanhua Zhang
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Xue Peng
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Zongyun Li
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Sheng Qin
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
| | - Ke Xing
- School of Life Science, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, PR China.
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21
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Meng D, Garba B, Ren Y, Yao M, Xia X, Li M, Wang Y. Antifungal activity of chitosan against Aspergillus ochraceus and its possible mechanisms of action. Int J Biol Macromol 2020; 158:1063-1070. [PMID: 32360472 DOI: 10.1016/j.ijbiomac.2020.04.213] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/18/2020] [Accepted: 04/24/2020] [Indexed: 10/24/2022]
Abstract
Chitosan is a polysaccharide with a wide-range antimicrobial spectrum and has been shown to be effective in control postharvest diseases of various fruit, but the possible mode of action is far from well known. In this study the antifungal activity of chitosan was tested on A. ochraceus and its possible mechanisms involved were also investigated both at microstructure and transcriptome level. Here, we found that chitosan could significantly inhibited spore germination and mycelia growth of A. ochraceus. Scan electron microscopy (SEM) and transmission electron microscopy (TEM) observations showed that chitosan induced remarkable changes in morphology and microstructure of hyphae, such as shriveling, abnormal branching and vacuolation. Changes in expression profiles of A. ochraceus upon chitosan treatment were analyzed by RNA sequencing and a total of 435 differentially expressed genes (DEGs) were identified. Further KEGG analysis revealed that DEGs involved in ribosome biogenesis were down-regulated, while DEGs related to membrane homeostasis, such as glycerophospholipid metabolism, ether lipid metabolism and steroid biosynthesis, were up-regulated. Chitosan may affect the growth and development of A. ochraceus by impairing the integrity of cell surface architecture and protein biosynthesis. These findings have practical implications with respect to the use of chitosan as an alternative way for controlling fungal pathogens.
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Affiliation(s)
- Di Meng
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Betchem Garba
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yun Ren
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Man Yao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xiaoshuang Xia
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Mingyan Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Yun Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
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22
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23
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Maluin FN, Hussein MZ. Chitosan-Based Agronanochemicals as a Sustainable Alternative in Crop Protection. Molecules 2020; 25:E1611. [PMID: 32244664 PMCID: PMC7180820 DOI: 10.3390/molecules25071611] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/18/2020] [Accepted: 03/23/2020] [Indexed: 11/26/2022] Open
Abstract
The rise in the World's food demand in line with the increase of the global population has resulted in calls for more research on the production of sustainable food and sustainable agriculture. A natural biopolymer, chitosan, coupled with nanotechnology could offer a sustainable alternative to the use of conventional agrochemicals towards a safer agriculture industry. Here, we review the potential of chitosan-based agronanochemicals as a sustainable alternative in crop protection against pests, diseases as well as plant growth promoters. Such effort offers better alternatives: (1) the existing agricultural active ingredients can be encapsulated into chitosan nanocarriers for the formation of potent biocides against plant pathogens and pests; (2) the controlled release properties and high bioavailability of the nanoformulations help in minimizing the wastage and leaching of the agrochemicals' active ingredients; (3) the small size, in the nanometer regime, enhances the penetration on the plant cell wall and cuticle, which in turn increases the argochemical uptake; (4) the encapsulation of agrochemicals in chitosan nanocarriers shields the toxic effect of the free agrochemicals on the plant, cells and DNA, thus, minimizing the negative impacts of agrochemical active ingredients on human health and environmental wellness. In addition, this article also briefly reviews the mechanism of action of chitosan against pathogens and the elicitations of plant immunity and defense response activities of chitosan-treated plants.
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Affiliation(s)
| | - Mohd Zobir Hussein
- Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia;
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Luo H, Qing Z, Deng Y, Deng Z, Tang X, Feng B, Lin W. Two Polyketides Produced by Endophytic Penicillium citrinum DBR-9 From Medicinal Plant Stephania kwangsiensis and Their Antifungal Activity Against Plant Pathogenic Fungi. Nat Prod Commun 2019. [DOI: 10.1177/1934578x19846795] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Endophytic fungi, especially those found in medicinal plants, are widely studied as producers of secondary metabolites of biotechnological interest. In this study, on the basis of an activity-directed isolation method and spectroscopic analysis, two active polyketides, citrinin (1) and emodin (2), were isolated and identified from the fermentation of the endophytic fungus Penicillium citrinum DBR-9. This fungus was isolated from the root tubers of the traditional Chinese medicinal plant Stephania kwangsiensis. In vitro antifungal assay showed that the two polyketides displayed significant inhibition on hypha growth of tested plant pathogenic fungi with IC50 values ranging from 3.1 to 123.1 μg/mL and 3.0 to 141.0 μg/mL, respectively. In addition, the mechanism of the effects of emodin (2) on the pathogen revealed it could affect the colony morphology, destroy cell membrane integrity, and influence the protein synthesis of the tested fungal cell. This work is the first report of two polyketides-producing endophytic P. citrinum DBR-9 from the medicinal plant S. kwangsiensis. Our results present new opportunities to deeply understand the potential of these two polyketides as natural antifungal agents to control phytopathogens in agriculture.
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Affiliation(s)
- Haiyu Luo
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Zhen Qing
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Yecheng Deng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Zhiyong Deng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Xia’an Tang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Beibei Feng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
| | - Wei Lin
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, Guilin, China
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Xing K, Li TJ, Liu YF, Zhang J, Zhang Y, Shen XQ, Li XY, Miao XM, Feng ZZ, Peng X, Li ZY, Qin S. Antifungal and eliciting properties of chitosan against Ceratocystis fimbriata in sweet potato. Food Chem 2018; 268:188-195. [DOI: 10.1016/j.foodchem.2018.06.088] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/11/2018] [Accepted: 06/18/2018] [Indexed: 12/18/2022]
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26
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Xing K, Xing Y, Liu Y, Zhang Y, Shen X, Li X, Miao X, Feng Z, Peng X, Qin S. Fungicidal effect of chitosan via inducing membrane disturbance against Ceratocystis fimbriata. Carbohydr Polym 2018; 192:95-103. [DOI: 10.1016/j.carbpol.2018.03.053] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 02/13/2018] [Accepted: 03/16/2018] [Indexed: 01/19/2023]
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Kumaraswamy R, Kumari S, Choudhary RC, Pal A, Raliya R, Biswas P, Saharan V. Engineered chitosan based nanomaterials: Bioactivities, mechanisms and perspectives in plant protection and growth. Int J Biol Macromol 2018; 113:494-506. [DOI: 10.1016/j.ijbiomac.2018.02.130] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 02/07/2018] [Accepted: 02/20/2018] [Indexed: 10/18/2022]
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28
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Ouyang S, Hu X, Zhou Q, Li X, Miao X, Zhou R. Nanocolloids in Natural Water: Isolation, Characterization, and Toxicity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:4850-4860. [PMID: 29554418 DOI: 10.1021/acs.est.7b05364] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanocolloids are widespread in natural water systems, but their characterization and ecological risks are largely unknown. Herein, tangential flow ultrafiltration (TFU) was used to separate and concentrate nanocolloids from surface waters. Unexpectedly, nanocolloids were present in high concentrations ranging from 3.7 to 7.2 mg/L in the surface waters of the Harihe River in Tianjin City, China. Most of the nanocolloids were 10-40 nm in size, contained various trace metals and polycyclic aromatic hydrocarbons, and exhibited fluorescence properties. Envelopment effects and aggregation of Chlorella vulgaris in the presence of nanocolloids were observed. Nanocolloids entered cells and nanocolloid-exposed cells exhibited stronger plasmolysis, chloroplast damage and more starch grains than the control cells. Moreover, nanocolloids inhibited the cell growth, promoted reactive oxygen species (ROS), reduce the chlorophyll a content and increased the cell permeability. The genotoxicity of nanocolloids was also observed. The metabolomics analysis revealed a significant ( p < 0.05) downregulation of amino acids and upregulation of fatty acids contributing to ROS increase, chlorophyll a decrease and plasmolysis. The present work reveals that nanocolloids, which are different from specific, engineered nanoparticles (e.g., Ag nanoparticles), are present at high concentrations, exhibit an obvious toxicity in environments, and deserve more attention in the future.
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Affiliation(s)
- Shaohu Ouyang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering , Nankai University , Tianjin 300350 , China
| | - Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering , Nankai University , Tianjin 300350 , China
| | - Qixing Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering , Nankai University , Tianjin 300350 , China
| | - Xiaokang Li
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering , Nankai University , Tianjin 300350 , China
| | - Xinyu Miao
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering , Nankai University , Tianjin 300350 , China
| | - Ruiren Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering , Nankai University , Tianjin 300350 , China
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Jiang J, Song Z, Yang X, Mao Z, Nie X, Guo H, Peng X. Microbial community analysis of apple rhizosphere around Bohai Gulf. Sci Rep 2017; 7:8918. [PMID: 28827532 PMCID: PMC5566992 DOI: 10.1038/s41598-017-08398-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 07/12/2017] [Indexed: 11/21/2022] Open
Abstract
Bohai Gulf is the main area for apple tree cultivation in China. Consecutive replanting significantly affects the yield and quality of apple trees in this area. Microecological imbalance in apple trees' rhizospheres caused by variation in the soil microbial community is considered the primary cause of apple replant disease (ARD). This study analysed the microbial communities of the rhizospheres of perennial apple trees (PAT) and apple tree saplings under replanting (ATS) around Bohai Gulf using high-throughput sequencing. The results revealed increased populations of typical pathogenic fungi Verticillium and bacteria Xanthomonadaceae, and decreased populations of beneficial bacterial populations Pseudomonas and Bacillus with replanting, suggesting that competition between pathogens and beneficial microbes varies according to the ratio of pathogens to beneficial microbes in rhizosphere soil under the replanting system. Meanwhile, replanting was accompanied by an increase in the antagonistic bacteria Arthrobacter and fungus Chaetomium, suggesting that increased numbers of pathogens can lead to more instances of antagonism. Redundancy analysis (RDA) revealed site position and the main soil properties (pH, organic matter, available N, available K, available P, and moisture) affected the microbial community composition. It found clear differences in soil microbial communities and demonstrated a better understanding of the causes for ARD.
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Affiliation(s)
- Jihang Jiang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
| | - Zhen Song
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xiaotong Yang
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
| | - Zhiquan Mao
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271000, China
| | - Xiaohong Nie
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China
| | - Hui Guo
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China.
| | - Xiawei Peng
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing, 100083, China.
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