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Jin W, Li L, Ma G, Wei Z. Halotolerant Microorganism-Based Soil Conditioner Application Improved the Soil Properties, Yield, Quality and Starch Characteristics of Hybrid Rice under Higher Saline Conditions. PLANTS (BASEL, SWITZERLAND) 2024; 13:2325. [PMID: 39204761 PMCID: PMC11359022 DOI: 10.3390/plants13162325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 08/14/2024] [Accepted: 08/19/2024] [Indexed: 09/04/2024]
Abstract
Soil salinity represents a significant factor affecting agricultural productivity and crop quality. The present study was conducted to investigate the effects of soil conditioner (SC) comprising halotolerant microorganisms on the soil fertility, yield, rice quality, and the physicochemical and structural properties of starch in hybrid rice under saline conditions. The experimental treatments were composed of two high-quality hybrid rice varieties, i.e., 'Y Liangyou 957' (YLY957) and Jing Liangyou 534 (JLY534), and two soil amendment treatments, i.e., the application of SC at control levels and 2250 kg hm-2, or 'CK and SC', respectively. The crop was subjected to a mixture of fresh and sea water (EC 11 dS/m). The results demonstrated that the application of SC significantly enhanced the rice yield under salt stress conditions owing to an increase in the number of grains per panicle. Furthermore, SC was found to be effective in improving the organic matter and soil nutrient content. Furthermore, the application of SC resulted in an improvement in antioxidant defense, higher leaf SPAD values, and greater crop biomass, as well as the translocation of photo-assimilates at the heading stage. The application of SC not only improved the milling and appearance quality but also enhanced the taste value of rice by increasing the amylose and reducing the protein content. Furthermore, the application of SC also decreased the indentations on the surfaces of starch granules and cracks on the edges of the granules. The rice varieties subjected to SC exhibited excellent pasting properties, characterized by reduced proportions of amylopectin short chains and a lower gelatinization temperature and enthalpy of gelatinization. Overall, these findings serve to reinforce the efficacy of soil conditioner as a valuable tool to improve rice productivity and sustainability with improved rice grain quality under saline conditions.
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Affiliation(s)
- Wenyu Jin
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China; (W.J.); (G.M.)
- National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Sanya 572024, China
| | - Lin Li
- National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Sanya 572024, China
| | - Guohui Ma
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China; (W.J.); (G.M.)
- National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Sanya 572024, China
| | - Zhongwei Wei
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China; (W.J.); (G.M.)
- National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Sanya 572024, China
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2
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Wei Y, Chen S, Zhou X, Ding D, Song J, Yang S. Endophytic Microorganisms in Tomato Roots, Changes in the Structure and Function of the Community at Different Growing Stages. Microorganisms 2024; 12:1251. [PMID: 38930633 PMCID: PMC11206058 DOI: 10.3390/microorganisms12061251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 05/20/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open
Abstract
This study analyzed flower bud differentiation and fruiting stages to investigate how the structure of the plant endophytic microbial community in the roots of tomatoes changes with plant senescence. Based on high-throughput sequencing technology, the diversity and relative abundance of endophytic microorganisms (bacteria and fungi) in tomato stems at different growth stages were analyzed. At the same time, based on LEfSe analysis, the differences in endophytic microorganisms in tomato stems at different growth stages were studied. Based on PICRUSt2 function prediction and FUNGuild, we predicted the functions of endophytic bacterial and fungal communities in tomato stems at different growth stages to explore potential microbial functional traits. The results demonstrated that not only different unique bacterial genera but also unique fungal genera could be found colonizing tomato roots at different growth stages. In tomato seedlings, flower bud differentiation, and fruiting stages, the functions of colonizing endophytes in tomato roots could primarily contribute to the promotion of plant growth, stress resistance, and improvement in nutrient cycling, respectively. These results also suggest that different functional endophytes colonize tomato roots at different growth stages.
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Affiliation(s)
- Yufei Wei
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Guangxi Agricultural College, Guangxi University, Nanning 530004, China; (Y.W.); (S.C.); (X.Z.); (D.D.)
| | - Siyu Chen
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Guangxi Agricultural College, Guangxi University, Nanning 530004, China; (Y.W.); (S.C.); (X.Z.); (D.D.)
| | - Xinyan Zhou
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Guangxi Agricultural College, Guangxi University, Nanning 530004, China; (Y.W.); (S.C.); (X.Z.); (D.D.)
| | - Diancao Ding
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Guangxi Agricultural College, Guangxi University, Nanning 530004, China; (Y.W.); (S.C.); (X.Z.); (D.D.)
| | - Jingjing Song
- Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, College of Marine Sciences, Beibu Gulf University, Qinzhou 535011, China
| | - Shangdong Yang
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Guangxi Agricultural College, Guangxi University, Nanning 530004, China; (Y.W.); (S.C.); (X.Z.); (D.D.)
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3
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Xue T, Fang Y, Li H, Li M, Li C. The Effects of Exogenous Benzoic Acid on the Physicochemical Properties, Enzyme Activities and Microbial Community Structures of Perilla frutescens Inter-Root Soil. Microorganisms 2024; 12:1190. [PMID: 38930572 PMCID: PMC11206010 DOI: 10.3390/microorganisms12061190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 06/07/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024] Open
Abstract
This study analyzed the effects of benzoic acid (BA) on the physicochemical properties and microbial community structure of perilla rhizosphere soil. The analysis was based on high-throughput sequencing technology and physiological and biochemical detection. The results showed that with the increase in BA concentration, soil pH significantly decreased, while the contents of total nitrogen (TN), alkaline nitrogen (AN), available phosphorus (AP), and available potassium (AK) significantly increased. The activities of soil conversion enzymes urease and phosphatase significantly increased, but the activities of catalase and peroxidase significantly decreased. This indicates that BA can increase soil enzyme activity and improve nutrient conversion; the addition of BA significantly altered the composition and diversity of soil bacterial and fungal communities. The relative abundance of beneficial bacteria such as Gemmatimonas, Pseudolabrys, and Bradyrhizobium decreased significantly, while the relative abundance of harmful fungi such as Pseudogymnoascus, Pseudoeurotium, and Talaromyces increased significantly. Correlation analysis shows that AP, AN, and TN are the main physicochemical factors affecting the structure of soil microbial communities. This study elucidates the effects of BA on the physicochemical properties and microbial community structure of perilla soil, and preliminarily reveals the mechanism of its allelopathic effect on the growth of perilla.
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Affiliation(s)
- Tongtong Xue
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, China; (T.X.); (Y.F.); (H.L.)
- Heilongjiang Province Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Yuxin Fang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, China; (T.X.); (Y.F.); (H.L.)
- Heilongjiang Province Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Hui Li
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, China; (T.X.); (Y.F.); (H.L.)
- Heilongjiang Province Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Mengsha Li
- Institute of Nature and Ecology, Heilongjiang Academy of Sciences, Harbin 150040, China
| | - Chongwei Li
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, China; (T.X.); (Y.F.); (H.L.)
- Heilongjiang Province Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, School of Life Sciences, Heilongjiang University, Harbin 150080, China
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Gao D, Xu A, Zhang Y, Liu F, Li H, Liang H. Metagenomic insights into carbon and nitrogen cycling in the water-land transition zone of inland alkaline wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 919:170856. [PMID: 38340836 DOI: 10.1016/j.scitotenv.2024.170856] [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: 11/28/2023] [Revised: 01/16/2024] [Accepted: 02/07/2024] [Indexed: 02/12/2024]
Abstract
Inland alkaline wetlands play a crucial role in maintaining ecological functions. However, these wetlands are becoming more vulnerable to the effects of water level fluctuations caused by global climate change, especially concerning carbon (C) and nitrogen (N) cycling. Here, metagenomics sequencing was used to investigate microorganism diversity, C and N cycling gene abundance at three water level types (D (dry), MF (middle flooded), HF (high flooded)) along an inland alkaline wetland. Our findings reveal that water level was the most important factor in regulating the microbial communities. Distinct shifts in community composition were found along the water level increases, without fundamentally altering their composition. With the increase of water level, the relative abundance of pmoA decreased from 2.5 × 10-5 to 5.1 × 10-6. The C cycling processes shift from predominantly CO2-generated processes under low water levels to CO2 and CH4 co-generated processes under high water levels. The relative abundance of nosZ reached 4.9 × 10-5 in HF, while in D and MF, it is recorded at 4.5 × 10-5 and 3.4 × 10-5, respectively. Water levels accelerate N cycling and generating N2O intermediates. Furthermore, our study highlights the dynamic competition and cooperation between C and N cycling processes. This research provides a comprehensive biological understanding of the influence of varying water levels on soil C and N cycling processes in wetland.
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Affiliation(s)
- Dawen Gao
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
| | - Ao Xu
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Yupeng Zhang
- College of Resources and Environmental Sciences, Henan Agricultural University, No.63 Agricultural Road, Zhengzhou 450002, China
| | - Fengqin Liu
- College of Life Sciences, Henan Agricultural University, No.63 Agricultural Road, Zhengzhou 450002, China
| | - Huiju Li
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong Liang
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
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5
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Sakauchi K, Otaki JM. Soil Microbes and Plant-Associated Microbes in Response to Radioactive Pollution May Indirectly Affect Plants and Insect Herbivores: Evidence for Indirect Field Effects from Chernobyl and Fukushima. Microorganisms 2024; 12:364. [PMID: 38399767 PMCID: PMC10892324 DOI: 10.3390/microorganisms12020364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/06/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
The biological impacts of the nuclear accidents in Chernobyl (1986) and Fukushima (2011) on wildlife have been studied in many organisms over decades, mainly from dosimetric perspectives based on laboratory experiments using indicator species. However, ecological perspectives are required to understand indirect field-specific effects among species, which are difficult to evaluate under dosimetric laboratory conditions. From the viewpoint that microbes play a fundamental role in ecosystem function as decomposers and symbionts for plants, we reviewed studies on microbes inhabiting soil and plants in Chernobyl and Fukushima in an attempt to find supporting evidence for indirect field-specific effects on plants and insect herbivores. Compositional changes in soil microbes associated with decreases in abundance and species diversity were reported, especially in heavily contaminated areas of both Chernobyl and Fukushima, which may accompany explosions of radioresistant species. In Chernobyl, the population size of soil microbes remained low for at least 20 years after the accident, and the abundance of plant-associated microbes, which are related to the growth and defense systems of plants, possibly decreased. These reported changes in microbes likely affect soil conditions and alter plant physiology. These microbe-mediated effects may then indirectly affect insect herbivores through food-mass-mediated, pollen-mediated, and metabolite-mediated interactions. Metabolite-mediated interactions may be a major pathway for ecological impacts at low pollution levels and could explain the decreases in insect herbivores in Fukushima. The present review highlights the importance of the indirect field effects of long-term low-dose radiation exposure under complex field circumstances.
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Affiliation(s)
| | - Joji M. Otaki
- The BCPH Unit of Molecular Physiology, Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara 903-0213, Okinawa, Japan;
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Zhang E, Lu Y, Zhao R, Yin X, Zhang J, Yu B, Yao M, Liao Z, Lan X. Endophytic bacterial community structure and diversity of the medicinal plant Mirabilis himalaica from different locations. Braz J Microbiol 2023; 54:2991-3003. [PMID: 37921953 PMCID: PMC10689605 DOI: 10.1007/s42770-023-01149-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 10/06/2023] [Indexed: 11/05/2023] Open
Abstract
Endophytic bacteria play important roles in medicinal plant growth, abiotic stress, and metabolism. Mirabilis himalaica (Edgew.) Heimerl is known for its medicinal value as Tibetan traditional plant; however, little is known about the endophytic bacteria associated with this plant in different geographic conditions and vegetal tissues. To compare the endophytic bacterial community associated with this plant in different geographic conditions and vegetal tissues, we collected the leaves, stems, and roots of M. himalaica from five locations, Nongmu college (NM), Gongbujiangda (GB), Zhanang County (ZL), Lang County (LX), and Sangri County (SR), and sequenced the 16S rRNA V5-V7 region with the Illumina sequencing method. A total of 522,450 high-quality sequences and 4970 operational taxonomic units (OTUs) were obtained. The different tissues from different locations harbored unique bacterial assemblages. Proteobacteria and Actinobacteria were the dominant phyla in all the samples, while the dominant genera changed based on the different tissues. The endophytic bacterial structures in the leaf and stem tissues were different compared to root tissues. Redundancy analysis (RDA) showed that the endophytic bacterial community was significantly correlated with pH, available phosphorus (AP), total phosphorus (TP), total nitrogen (TN), and soil organic matter (SOM). These findings suggested that the geographic conditions, climate type, ecosystem type, and tissues determined the endophytic bacterial composition and relative abundances. This conclusion could facilitate an understanding of the relationship and ecological function of the endophytic bacteria associated with M. himalaica and provide valuable information for artificial planting of M. himalaica and identifying and applying functional endophytic bacteria.
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Affiliation(s)
- Erhao Zhang
- The Provincial and Ministerial Co-Founded Collaborative Innovation Center for R & D in Tibet Characteristic Agricultural and Animal Husbandry Resources, The Center for Xizang Chinese (Tibetan) Medicine Resource, Joint Laboratory for Tibetan Materia Medica Resources Scientific Protection and Utilization Research of Tibetan Medical Research Center of Tibet, Tibet Agriculture and Animal Husbandry University, Nyingchi, 860000, Tibet, China
| | - Yazhou Lu
- The Provincial and Ministerial Co-Founded Collaborative Innovation Center for R & D in Tibet Characteristic Agricultural and Animal Husbandry Resources, The Center for Xizang Chinese (Tibetan) Medicine Resource, Joint Laboratory for Tibetan Materia Medica Resources Scientific Protection and Utilization Research of Tibetan Medical Research Center of Tibet, Tibet Agriculture and Animal Husbandry University, Nyingchi, 860000, Tibet, China
| | - Rundong Zhao
- The Provincial and Ministerial Co-Founded Collaborative Innovation Center for R & D in Tibet Characteristic Agricultural and Animal Husbandry Resources, The Center for Xizang Chinese (Tibetan) Medicine Resource, Joint Laboratory for Tibetan Materia Medica Resources Scientific Protection and Utilization Research of Tibetan Medical Research Center of Tibet, Tibet Agriculture and Animal Husbandry University, Nyingchi, 860000, Tibet, China
| | - Xiu Yin
- The Provincial and Ministerial Co-Founded Collaborative Innovation Center for R & D in Tibet Characteristic Agricultural and Animal Husbandry Resources, The Center for Xizang Chinese (Tibetan) Medicine Resource, Joint Laboratory for Tibetan Materia Medica Resources Scientific Protection and Utilization Research of Tibetan Medical Research Center of Tibet, Tibet Agriculture and Animal Husbandry University, Nyingchi, 860000, Tibet, China
| | - Jie Zhang
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou, 466001, Henan, China
| | - Benxia Yu
- Chongqing Academy of Chinese Materia Medica, Chongqing, 400065, China
| | - Min Yao
- Jiangxi Institute for Drug Control, NMPA Key Laboratory of Quality Evaluation of Traditional Chinese Patent Medicine, Nanchang, 330029, Jiangxi, China
| | - Zhihua Liao
- Key Laboratory of Eco-Environments in the Three Gorges Reservoir Region, Ministry of Education, Chongqing Engineering and Technology Research Center for Sweetpotato, School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Xiaozhong Lan
- The Provincial and Ministerial Co-Founded Collaborative Innovation Center for R & D in Tibet Characteristic Agricultural and Animal Husbandry Resources, The Center for Xizang Chinese (Tibetan) Medicine Resource, Joint Laboratory for Tibetan Materia Medica Resources Scientific Protection and Utilization Research of Tibetan Medical Research Center of Tibet, Tibet Agriculture and Animal Husbandry University, Nyingchi, 860000, Tibet, China.
- Chongqing Academy of Chinese Materia Medica, Chongqing, 400065, China.
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Boondaeng A, Vaithanomsat P, Apiwatanapiwat W, Trakunjae C, Janchai P, Suriyachai N, Kreetachat T, Wongcharee S, Imman S. Biological Conversion of Agricultural Wastes into Indole-3-acetic Acid by Streptomyces lavenduligriseus BS50-1 Using a Response Surface Methodology (RSM). ACS OMEGA 2023; 8:40433-40441. [PMID: 37929142 PMCID: PMC10620907 DOI: 10.1021/acsomega.3c05004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 10/06/2023] [Indexed: 11/07/2023]
Abstract
Agricultural waste is an alternative source for plant growth regulator biosynthesis by microorganisms. Actinobacteria are important soil microbes that significantly impact the soil as plant growth-promoting rhizobacteria and biofertilizers. This study focused on developing low-cost medium based on bagasse to improve indole-3-acetic acid (IAA) production by Streptomyces lavenduligriseus BS50-1 using a response surface methodology (RSM). Among 34 actinobacterial strains, S. lavenduligriseus BS50-1 produced the highest IAA level within the selected medium. An RSM based on a central composite design optimized the appropriate nutrients for IAA production. Thus, glucose hydrolysate and l-tryptophan at concentrations of 3.55 and 5.0 g/L, respectively, were the optimal factors that improved IAA production from 37.50 to 159.47 μg/mL within 168 h. This study reported a potential application of leftover bagasse as the raw material for cultivating actinobacteria, which efficiently produce IAA to promote plant growth.
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Affiliation(s)
- Antika Boondaeng
- Kasetsart Agricultural
and Agro-Industrial Product Improvement Institute, Kasetsart University, Bangkok 10900, Thailand
| | - Pilanee Vaithanomsat
- Kasetsart Agricultural
and Agro-Industrial Product Improvement Institute, Kasetsart University, Bangkok 10900, Thailand
| | - Waraporn Apiwatanapiwat
- Kasetsart Agricultural
and Agro-Industrial Product Improvement Institute, Kasetsart University, Bangkok 10900, Thailand
| | - Chanaporn Trakunjae
- Kasetsart Agricultural
and Agro-Industrial Product Improvement Institute, Kasetsart University, Bangkok 10900, Thailand
| | - Phornphimon Janchai
- Kasetsart Agricultural
and Agro-Industrial Product Improvement Institute, Kasetsart University, Bangkok 10900, Thailand
| | - Nopparat Suriyachai
- School of Energy and Environment, University
of Phayao, Tambon Maeka, Amphur Muang, Phayao 56000, Thailand
| | - Torpong Kreetachat
- School of Energy and Environment, University
of Phayao, Tambon Maeka, Amphur Muang, Phayao 56000, Thailand
| | - Surachai Wongcharee
- Field
of Environmental Engineering, Faculty of Engineering, Mahasarakham University, Khamriang, Kantarawichai, Mahasarakham 44150, Thailand
| | - Saksit Imman
- School of Energy and Environment, University
of Phayao, Tambon Maeka, Amphur Muang, Phayao 56000, Thailand
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Devi S, Manhas RK. Induction of systemic resistance in Solanum lycopersicum and Capsicum annum seedlings against Fusarium wilt by Streptomyces bioformulations. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:109438-109452. [PMID: 37775628 DOI: 10.1007/s11356-023-29973-w] [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: 05/26/2023] [Accepted: 09/15/2023] [Indexed: 10/01/2023]
Abstract
Plant diseases induced by various phytopathogens pose a significant threat to contemporary agricultural systems around the world. In modern agriculture, the use of pesticides is still a valuable and effective method to control plant diseases. However, agrochemicals are becoming less popular because of the accretion of toxic compounds perilous and potentially hazardous to humans and the environment. Taking into consideration these aspects, the present study was conducted to explore the biocontrol potential of an endophytic Streptomyces sp. SP5 bioformulations against Fusarium wilt. Three bioformulations were prepared using cell biomass and different carriers, i.e., B1 (talc-kaolin), B2 (MgSO4/glycerol/Na-alginate/talc/Ca-lignosulfonate), and B3 (calcium carbonate/CMC/talc). Apart from antagonistic action against Fusarium wilt, the influence of bioformulations on plant growth and systemic resistance was investigated by analyzing morphological parameters (root length, shoot length, root weight, shoot weight), biochemical parameters (photosynthetic pigments, non-enzymatic antioxidants), and induction of antioxidative enzymes, e.g., catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and superoxide dismutase (SOD), in S. lycopersicum and C. annum seedlings. The results revealed that Streptomyces bioformulations effectively controlled Fusarium wilt in S. lycopersicum and C. annum (82.6-83.4% and 81.8-100%, respectively). Besides reducing disease prevalence, bioformulations significantly increased all the morphological parameters and increased the activity of antioxidative enzymes, i.e., CAT, APX, GPX, and SOD, in plants. The current findings display that bioformulations can be utilized as environment-friendly biocontrol agents against Fusarium wilt and also as plant growth promoters.
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Affiliation(s)
- Sapna Devi
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab, 143005, India
| | - Rajesh Kumari Manhas
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab, 143005, India.
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Mandal S, Anand U, López-Bucio J, Radha, Kumar M, Lal MK, Tiwari RK, Dey A. Biostimulants and environmental stress mitigation in crops: A novel and emerging approach for agricultural sustainability under climate change. ENVIRONMENTAL RESEARCH 2023; 233:116357. [PMID: 37295582 DOI: 10.1016/j.envres.2023.116357] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 04/05/2023] [Accepted: 06/06/2023] [Indexed: 06/12/2023]
Abstract
Pesticide and fertilizer usage is at the center of agricultural production to meet the demands of an ever-increasing global population. However, rising levels of chemicals impose a serious threat to the health of humans, animals, plants, and even the entire biosphere because of their toxic effects. Biostimulants offer the opportunity to reduce the agricultural chemical footprint owing their multilevel, beneficial properties helping to make agriculture more sustainable and resilient. When applied to plants or to the soil an increased absorption and distribution of nutrients, tolerance to environmental stress, and improved quality of plant products explain the mechanisms by which these probiotics are useful. In recent years, the use of plant biostimulants has received widespread attention across the globe as an ecologically acceptable alternative to sustainable agricultural production. As a result, their worldwide market continues to grow, and further research will be conducted to broaden the range of the products now available. Through this review, we present a current understanding of biostimulants, their mode of action and their involvement in modulating abiotic stress responses, including omics research, which may provide a comprehensive assessment of the crop's response by correlating molecular changes to physiological pathways activated under stress conditions aggravated by climate change.
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Affiliation(s)
- Sayanti Mandal
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Ganeshkhind Road, Pune, Maharashtra, 411007, India; Department of Biotechnology, Dr. D. Y. Patil Arts, Commerce & Science College, Sant Tukaram Nagar, Pimpri, Pune, Maharashtra, 411018, India.
| | - Uttpal Anand
- Zuckerberg Institute for Water Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, 8499000, Israel
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C.P. 58030, Morelia, Michoacán, Mexico
| | - Radha
- School of Biological and Environmental Sciences, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, Himachal Pradesh, India
| | - Manoj Kumar
- Chemical and Biochemical Processing Division, ICAR - Central Institute for Research on Cotton Technology, Mumbai, 400019, India
| | - Milan Kumar Lal
- ICAR-Central Potato Research Institute, Shimla, 171001, Himachal Pradesh, India; ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Rahul Kumar Tiwari
- ICAR-Central Potato Research Institute, Shimla, 171001, Himachal Pradesh, India; ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, 86/1 College Street, Kolkata, 700073, West Bengal, India.
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10
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Liu R, Lv X, Wang X, Yang L, Cao J, Dai Y, Wu W, Wu Y. Integrative analysis of the multi-omics reveals the stripe rust fungus resistance mechanism of the TaPAL in wheat. FRONTIERS IN PLANT SCIENCE 2023; 14:1174450. [PMID: 37342140 PMCID: PMC10277697 DOI: 10.3389/fpls.2023.1174450] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 05/05/2023] [Indexed: 06/22/2023]
Abstract
Wheat is one of the major food crops in the world. However, stripe rust fungus significantly decreases wheat yield and quality. In the present study, transcriptomic and metabolite analyses were conducted in R88 (resistant line) and CY12 (susceptible cultivar) during Pst-CYR34 infection due to the limited availability of information regarding the underlying mechanisms governing wheat-pathogen interactions. The results revealed that Pst infection promoted the genes and metabolites involved in phenylpropanoid biosynthesis. The key enzyme gene TaPAL to regulate lignin and phenolic synthesis has a positive resistance contribution to Pst in wheat, which was verified by the virus-induced gene silencing (VIGS) technique. The distinctive resistance of R88 is regulated by the selective expression of genes involved in the fine-tuning of wheat-Pst interactions. Furthermore, metabolome analysis suggested that lignin biosynthesis-related metabolite accumulation was significantly affected by Pst. These results help to elucidate the regulatory networks of wheat-Pst interactions and pave the way for durable resistance breeding in wheat, which may ease environmental and food crises around the world.
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Affiliation(s)
- Rong Liu
- Faculty of Agriculture, Forestry and Food Engineering of Yibin University, Yibin, China
| | - Xue Lv
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
| | - Xiaohua Wang
- Faculty of Agriculture, Forestry and Food Engineering of Yibin University, Yibin, China
| | - Li Yang
- Wuhan Metware Biotechnology, Wuhan, Wuhan, China
| | - Jun Cao
- Faculty of Agriculture, Forestry and Food Engineering of Yibin University, Yibin, China
| | - Ya Dai
- Faculty of Agriculture, Forestry and Food Engineering of Yibin University, Yibin, China
| | - Wang Wu
- Faculty of Agriculture, Forestry and Food Engineering of Yibin University, Yibin, China
| | - Yu Wu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
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11
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Li X, Lang D, Wang J, Zhang W, Zhang X. Plant-beneficial Streptomyces dioscori SF1 potential biocontrol and plant growth promotion in saline soil within the arid and semi-arid areas. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27362-x. [PMID: 37145360 DOI: 10.1007/s11356-023-27362-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 04/27/2023] [Indexed: 05/06/2023]
Abstract
Environmental challenges like salinity, drought, fungal phytopathogens, and pesticides directly or/and indirectly influence the environment and agricultural yields. Certain beneficial endophytic Streptomyces sp. can ameliorate environmental stresses and be utilized as crop growth promoters under adverse conditions. Herein, Streptomyces dioscori SF1 (SF1) isolated from seeds of Glycyrrhiza uralensis tolerated fungal phytopathogens and abiotic stresses (drought, salt, and acid base). Strain SF1 showed multifarious plant growth promotion characteristics, including the production of indole acetic acid (IAA), ammonia, siderophores, ACC deaminase, extracellular enzymes, the ability of potassium solubilization, and nitrogen fixation. The dual plate assay showed that strain SF1 inhibited 63.21 ± 1.53%, 64.84 ± 1.35%, and 74.19 ± 2.88% of Rhizoctonia solani, Fusarium acuminatum, and Sclerotinia sclerotiorum, respectively. The detached root assays showed that strain SF1 significantly reduced the number of rotten sliced roots, and the biological control effect on sliced roots of Angelica sinensis, Astragalus membranaceus, and Codonopsis pilosula was 93.33%, 86.67%, and 73.33%, respectively. Furthermore, the strain SF1 significantly increased the growth parameters and biochemical indicators of adversity in G. uralensis seedlings under drought and/or salt conditions, including radicle length and diameter, hypocotyl length and diameter, dry weight, seedling vigor index, antioxidant enzyme activity, and non-enzymatic antioxidant content. In conclusion, the strain SF1 can be used to develop environmental protection biological control agents, improve the anti-disease activity of plants, and promote plant growth in salinity soil within arid and semi-arid regions.
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Affiliation(s)
- Xiaokang Li
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Duoyong Lang
- Laboratory Animal Center, Ningxia Medical University, Yinchuan, 750004, China
| | - Jianhuan Wang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Wenjin Zhang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China
| | - Xinhui Zhang
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, China.
- Ningxia Engineering and Technology Research Center of Regional Characteristic Traditional Chinese Medicine, Ningxia Collaborative Innovation Center of Regional Characteristic Traditional Chinese Medicine, Key Laboratory of Ningxia Minority Medicine Modernization, Ministry of Education, Yinchuan, 750004, China.
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12
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Kawicha P, Nitayaros J, Saman P, Thaporn S, Thanyasiriwat T, Somtrakoon K, Sangdee K, Sangdee A. Evaluation of Soil Streptomyces spp. for the Biological Control of Fusarium Wilt Disease and Growth Promotion in Tomato and Banana. THE PLANT PATHOLOGY JOURNAL 2023; 39:108-122. [PMID: 36760053 PMCID: PMC9929171 DOI: 10.5423/ppj.oa.08.2022.0124] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 06/18/2023]
Abstract
Fusarium oxysporum f. sp. lycopersici (Fol) and Fusarium oxysporum f. sp. cubense (Foc), are the causal agent of Fusarium wilt disease of tomato and banana, respectively, and cause significant yield losses worldwide. A cost-effective measure, such as biological control agents, was used as an alternative method to control these pathogens. Therefore, in this study, six isolates of the Streptomyces-like colony were isolated from soils and their antagonistic activity against phytopathogenic fungi and plant growth-promoting (PGP) activity were assessed. The results showed that these isolates could inhibit the mycelial growth of Fol and Foc. Among them, isolate STRM304 showed the highest percentage of mycelial growth reduction and broad-spectrum antagonistic activity against all tested fungi. In the pot experiment study, the culture filtrate of isolates STRM103 and STRM104 significantly decreased disease severity and symptoms in Fol inoculated plants. Similarly, the culture filtrate of the STRM304 isolate significantly reduced the severity of the disease and symptoms of the disease in Foc inoculated plants. The PGP activity test presents PGP activities, such as indole acetic acid production, phosphate solubilization, starch hydrolysis, lignin hydrolysis, and cellulase activity. Interestingly, the application of the culture filtrate from all isolates increased the percentage of tomato seed germination and stimulated the growth of tomato plants and banana seedlings, increasing the elongation of the shoot and the root and shoot and root weight compared to the control treatment. Therefore, the isolate STRM103 and STRM104, and STRM304 could be used as biocontrol and PGP agents for tomato and banana, respectively, in sustainable agriculture.
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Affiliation(s)
- Praphat Kawicha
- Plant Pest and Biocontrol Research Unit, Department of Agriculture and Resources, Faculty of Natural Resources and Agro-Industry, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon 47000,
Thailand
| | - Jariya Nitayaros
- Plant Pest and Biocontrol Research Unit, Department of Agriculture and Resources, Faculty of Natural Resources and Agro-Industry, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon 47000,
Thailand
- Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150,
Thailand
| | - Prakob Saman
- Plant Pest and Biocontrol Research Unit, Department of Agriculture and Resources, Faculty of Natural Resources and Agro-Industry, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon 47000,
Thailand
- Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150,
Thailand
| | - Sirikanya Thaporn
- Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150,
Thailand
| | - Thanwanit Thanyasiriwat
- Plant Pest and Biocontrol Research Unit, Department of Agriculture and Resources, Faculty of Natural Resources and Agro-Industry, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon 47000,
Thailand
| | - Khanitta Somtrakoon
- Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150,
Thailand
- Microbiology and Applied Microbiology Research Unit, Faculty of Science, Mahasarakham University, Kantarawichai District, Maha Sarakham 44150,
Thailand
| | - Kusavadee Sangdee
- Preclinical Group, Faculty of Medicine, Mahasarakham University, Muang District, Maha Sarakham 44000,
Thailand
| | - Aphidech Sangdee
- Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham 44150,
Thailand
- Microbiology and Applied Microbiology Research Unit, Faculty of Science, Mahasarakham University, Kantarawichai District, Maha Sarakham 44150,
Thailand
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13
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Choi NY, Park SA, Lee YR, Lee CH. Psychophysiological Responses of Humans during Seed-Sowing Activity Using Soil Inoculated with Streptomyces rimosus. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16275. [PMID: 36498346 PMCID: PMC9738200 DOI: 10.3390/ijerph192316275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Electroencephalogram (EEG) responses and serum metabolite levels were used to investigate the effects of horticultural activities (seed-sowing) on the psychophysiological aspects of adults based on the presence or absence of the soil microorganism Streptomyces rimosus. In this case, 31 adults were subjected to seed-sowing activities using S. rimosus inoculated (experimental group) and medium (control group) soils. EEG was measured to analyze the resulting psychophysiological response, and blood samples (5 mL) were collected. The relative gamma power (RG), relative high beta (RHB), and SEF 50 and SEF 90 were significantly higher in the right than in the left occipital lobe (p < 0.05). In both occipital lobes, ratios of SMR to theta (RST), mid beta to theta (RMT), and SMR-mid beta to theta (RSMT) were high (p < 0.05). GC-TOF-MS-based serum metabolite analysis detected 33 metabolites. Compared to the control group, the experimental group showed a lower content of amino acids (except aspartic acid), lipids, and C6 sugar monomers after the activity (p < 0.05). Aminomalonic acid was decreased, and aspartic acid was increased (p < 0.05). This study confirmed a positive effect on improving the concentration and attention of adults when seed-sowing activity was performed using S. rimosus-inoculated soil.
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Affiliation(s)
- Na-Yoon Choi
- Department of Bio and Healing Convergence, Graduate School, Konkuk University, Seoul 05029, Republic of Korea
| | - Sin-Ae Park
- Department of Bio and Healing Convergence, Graduate School, Konkuk University, Seoul 05029, Republic of Korea
- Research Institute for Bioactive-Metabolome Network, Konkuk University, Seoul 05029, Republic of Korea
- Department of Systems Biotechnology, Konkuk University, Seoul 05029, Republic of Korea
| | - Ye-Rim Lee
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea
| | - Choong Hwan Lee
- Research Institute for Bioactive-Metabolome Network, Konkuk University, Seoul 05029, Republic of Korea
- Department of Systems Biotechnology, Konkuk University, Seoul 05029, Republic of Korea
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea
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14
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Ren H, Ding Y, Hao X, Hao J, Liu J, Wang Y. Enhanced rhizoremediation of polychlorinated biphenyls by resuscitation-promoting factor stimulation linked to plant growth promotion and response of functional microbial populations. CHEMOSPHERE 2022; 309:136519. [PMID: 36210576 DOI: 10.1016/j.chemosphere.2022.136519] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/25/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Rhizoremediation is acknowledged as a green technology for removing polychlorinated biphenyls (PCBs) in soil. However, rhizoremediation is limited because most soil microorganisms enter into a viable but non-culturable (VBNC) state under PCBs stress. This work was to study the effect of resuscitation-promoting factor (Rpf) on rhizoremediation efficiency of PCBs in alfalfa and rhizosphere microbiological communities. Results suggested that Rpf promoted alfalfa growth in PCB-contaminated soil by improving antioxidant enzymes and detoxification metabolites in alfalfa. After 40 d Rpf treatment, removal rate for five selected PCBs significantly increased by 0.5-2.2 times. Rpf enhanced relative abundances of bphA and bphC responsible for degrading PCBs, and enzymatic activities of metabolizing exogenous compounds in rhizosphere soil. High-throughput sequencing showed that Rpf did not change the dominant microbial population at phyla and genera levels, but caused variation of the bacterial community structures. The promoting function of Rpf was linked to the shift of various key populations having different functions depending on Rpf concentrations. Pseudomonas and Rhizobium spp. enrichment might stimulate PCB degradation and Streptomyces and Bacillus spp. primarily contributed to alfalfa growth. Predicted functions in rhizosphere soil bacterial community indicated Rpf facilitated soil nutrient cycling and environmental adaptation. This study indicated that Rpf was an active additive for strengthening rhizoremediation efficiency of PCB-contaminated soil and enhancing their in-situ remediation.
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Affiliation(s)
- Hejun Ren
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, Jilin Provincial Key Laboratory of Water Resource and Environment, College of New Energy and Environment, Jilin University, 2519 Jiefang Road, Changchun, 130021, China.
| | - Yuzhu Ding
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, Jilin Provincial Key Laboratory of Water Resource and Environment, College of New Energy and Environment, Jilin University, 2519 Jiefang Road, Changchun, 130021, China
| | - Xinyu Hao
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, Jilin Provincial Key Laboratory of Water Resource and Environment, College of New Energy and Environment, Jilin University, 2519 Jiefang Road, Changchun, 130021, China
| | - Jianjun Hao
- School of Food & Agriculture, The University of Maine, Orono, 04469-5735, USA
| | - Jinliang Liu
- College of Plant Sciences, Jilin University, Changchun, 130062, China
| | - Yan Wang
- College of Plant Sciences, Jilin University, Changchun, 130062, China.
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15
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Devi S, Sharma M, Manhas RK. Investigating the plant growth promoting and biocontrol potentiality of endophytic Streptomyces SP. SP5 against early blight in Solanum lycopersicum seedlings. BMC Microbiol 2022; 22:285. [PMID: 36447141 PMCID: PMC9706909 DOI: 10.1186/s12866-022-02695-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 11/08/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Early blight (EB), caused by Alternaria solani, is one of the alarming diseases that restrict tomato production globally. Existing cultural practices and fungicide applications are not enough to control early blight diseases. Therefore, the study aimed to isolate, identify, and characterize an endophytic Streptomyces exhibiting the potential to control early blight in tomato and also promote plant growth. RESULTS From a Citrus jambhiri leaf, an endophytic Streptomyces sp. with antagonistic activity against Alternaria solani, Colletotrichum acutatum, Cladosporium herbarum, Alternaria brassicicola, Alternaria sp., Fusarium oxysporum and Fusarium sp. was isolated. It was identified as a Streptomyces sp. through 16S ribosomal DNA sequence analysis and designated as SP5. It also produced indole acetic acid which was confirmed by Salkowski reagent assay, TLC and HPLC analysis. Treatment of pathogen infected plants with Streptomyces sp. SP5 antagonists (culture cells/culture supernatant/solvent extract/ acetone precipitates) decreased the early blight disease incidence and significantly increased the various agronomic traits. CONCLUSION The present study concluded that Streptomyces sp. SP5 possessed antifungal activity against different fungal phytopathogens and had significant potential to control early blight disease and promote plant growth.
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Affiliation(s)
- Sapna Devi
- grid.411894.10000 0001 0726 8286Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab India
| | - Manish Sharma
- grid.411894.10000 0001 0726 8286Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab India
| | - Rajesh Kumari Manhas
- grid.411894.10000 0001 0726 8286Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab India
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16
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Zheng X, Xiao R, Chen M, Wu H, Gao X, Wang J. An avirulent Ralstonia solanacearum strain FJAT1458 outcompetes with virulent strain and induces tomato plant resistance against bacterial wilt. PEST MANAGEMENT SCIENCE 2022; 78:5002-5013. [PMID: 36053816 DOI: 10.1002/ps.7123] [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: 06/08/2022] [Revised: 07/22/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Bacterial wilt (BW) caused by Ralstonia solanacearum (RS) is considered as one of the most destructive plant diseases. An avirulent strain of RS, FJAT1458, is a potential biocontrol agent of BW. In this study, the mechanism of FJAT1458 against BW was evaluated. RESULTS FJAT1458 was tagged with the red fluorescent protein gene, and the resulting strain was named as FJAT1458-RFP. When FJAT1458-RFP and FJAT91-GFP (a virulent strain of RS labelled with the green fluorescent protein gene), were co-inoculated in potted tomato plants, the colonization of FJAT91-GFP reached an almost undetectable level at 7 days post-inoculation (dpi) in the roots and at 9 dpi in rhizosphere soil. When they were co-inoculated in a hydroponic tomato growing system, numbers of the two strains were similar at 3 dpi in the root tissues; however, FJAT91-GFP was not detected at 9 dpi while FJAT1458-RFP maintained 1.77 × 105 CFU g-1 . The inoculation of FJAT1458-RFP alone or combination with FJAT91-GFP significantly increased tomato root activity. Moreover, expression levels of the defense-related genes PR-1a, GLUA, and CHI3 in tomato roots were significantly up-regulated by FJAT1458-RFP and co-inoculation of FJAT1458-RFP and FJAT91-GFP at 5 dpi, compared to the control (water, CK) treatment. Noteworthy, expression levels of GLUA in the treatments of FJAT1458-RFP and FJAT1458-RFP + FJAT91-GFP were 12.22- and 12.05-fold higher than that in the CK at 5 dpi, respectively. CONCLUSIONS The results suggested that the avirulent strain FJAT1458-RFP could suppress colonization of the virulent strain in tomato roots, and induce tomato plant resistance against BW. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Xuefang Zheng
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Rongfeng Xiao
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Meichun Chen
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Huijun Wu
- Key Laboratory of Integrated and Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xuewen Gao
- Key Laboratory of Integrated and Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jieping Wang
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agriculture Sciences, Fuzhou, China
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17
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Diversity and Bioactivity of Endophytic Actinobacteria Associated with Grapevines. Curr Microbiol 2022; 79:390. [PMCID: PMC9633489 DOI: 10.1007/s00284-022-03068-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 09/29/2022] [Indexed: 11/05/2022]
Abstract
AbstractGrapevine trunk diseases (GTDs) are a significant problem for New Zealand viticulture. Endophytic actinobacteria are of interest as potential biocontrol agents due to their ability to inhibit plant pathogens and improve plant growth. However, no studies have investigated the diversity of actinobacteria associated with grapevines in New Zealand vineyards and their bioactivity. Actinobacteria diversity in different ‘Sauvignon blanc’ vine tissues from three vineyards (conventional and organic management, and different vine ages) was assessed using different methods and media. Forty-six endophytic actinobacteria were isolated, with more isolates recovered from roots (n = 45) than leaves (n = 1) and shoot internodes (n = 0). More isolates were recovered from the organic (n = 21) than conventional (n = 8) vineyard, mature (25-year old; n = 21) than young (2-year old; n = 2) vines and using a tissue maceration technique (n = 40). Actinomycete Isolation Agar, International Streptomyces Project 2, and Starch Casein media were effective for actinobacteria isolation. Most of the isolates recovered belonged to Streptomyces, with one isolate identified as Mycolicibacterium. Forty isolates were assessed for antifungal activity and plant growth-promoting (PGP) characteristics. Of these, 13 isolates had antifungal activity against test GTD pathogens (Dactylonectria macrodidyma, Eutypa lata, Ilyonectria liriodendri, Neofusicoccum parvum, and N. luteum). Eighteen isolates exhibited more than one PGP trait; 25siderophore production (n = 25), phosphate solubilization (n = 6), and indole acetic acid production (n = 16). Two strains, Streptomyces sp. LUVPK-22 and Streptomyces sp. LUVPK-30, exhibited the best antifungal and PGP properties. This study revealed the diversity of culturable endophytic actinobacteria from grapevines in New Zealand vineyards and their biocontrol potential against GTD pathogens.
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18
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Shi H, Xu P, Wu S, Yu W, Cheng Y, Chen Z, Yang X, Yu X, Li B, Ding A, Wang W, Sun Y. Analysis of rhizosphere bacterial communities of tobacco resistant and non-resistant to bacterial wilt in different regions. Sci Rep 2022; 12:18309. [PMID: 36316337 PMCID: PMC9622857 DOI: 10.1038/s41598-022-20293-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 09/12/2022] [Indexed: 11/06/2022] Open
Abstract
Tobacco bacterial wilt has seriously affected tobacco production. Ethyl methanesulfonate (EMS) induced tobacco bacterial wilt resistant mutants are important for the control of tobacco bacterial wilt. High-throughput sequencing technology was used to study the rhizosphere bacterial community assemblages of bacterial wilt resistant mutant tobacco rhizosphere soil (namely KS), bacterial wilt susceptible tobacco rhizosphere soil (namely GS) and bulk soil (namely BS) in Xuancheng, Huanxi, Yibin and Luzhou. Alpha analysis showed that the bacterial community diversity and richness of KS and GS in the four regions were not significantly different. However, analysis of intergroup variation in the top 15 bacterial communities in terms of abundance showed that the bacterial communities of KS and GS were significantly different from BS, respectively. In addition, pH, alkali-hydrolysable nitrogen (AN) and soil organic carbon (SOC) were positively correlated with the bacterial community of KS and negatively correlated with GS in the other three regions except Huanxi. Network analysis showed that the three soils in the four regions did not show a consistent pattern of network complexity. PICRUSt functional prediction analysis showed that the COG functions were similar in all samples. All colonies were involved in RNA processing and modification, chromatin structure and dynamics, etc. In conclusion, our experiments showed that rhizosphere bacterial communities of tobacco in different regions have different compositional patterns, which are strongly related to soil factors.
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Affiliation(s)
- Haoqi Shi
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Peiwen Xu
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Shengxin Wu
- Fujian Institute of Tobacco Agricultural Sciences, Fuzhou, 350003, China
| | - Wen Yu
- Fujian Institute of Tobacco Agricultural Sciences, Fuzhou, 350003, China
| | - Yazhi Cheng
- Fujian Institute of Tobacco Agricultural Sciences, Fuzhou, 350003, China
| | - Zhihua Chen
- Sichuan Tobacco Science Institute, Sichuan Branch of China National Tobacco Corporation, Chengdu, 615000, China
| | - Xingyou Yang
- Sichuan Tobacco Science Institute, Sichuan Branch of China National Tobacco Corporation, Chengdu, 615000, China
| | - Xiangwen Yu
- Sichuan Tobacco Science Institute, Sichuan Branch of China National Tobacco Corporation, Chengdu, 615000, China
| | - Bingjie Li
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Anming Ding
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China.
| | - Weifeng Wang
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China.
| | - Yuhe Sun
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao, 266101, China
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19
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The Arabidopsis thaliana–Streptomyces Interaction Is Controlled by the Metabolic Status of the Holobiont. Int J Mol Sci 2022; 23:ijms232112952. [PMID: 36361736 PMCID: PMC9655247 DOI: 10.3390/ijms232112952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 11/26/2022] Open
Abstract
How specific interactions between plant and pathogenic, commensal, or mutualistic microorganisms are mediated and how bacteria are selected by a plant are important questions to address. Here, an Arabidopsis thaliana mutant called chs5 partially deficient in the biogenesis of isoprenoid precursors was shown to extend its metabolic remodeling to phenylpropanoids and lipids in addition to carotenoids, chlorophylls, and terpenoids. Such a metabolic profile was concomitant to increased colonization of the phyllosphere by the pathogenic strain Pseudomonas syringae pv. tomato DC3000. A thorough microbiome analysis by 16S sequencing revealed that Streptomyces had a reduced colonization potential in chs5. This study revealed that the bacteria–Arabidopsis interaction implies molecular processes impaired in the chs5 mutant. Interestingly, our results revealed that the metabolic status of A. thaliana was crucial for the specific recruitment of Streptomyces into the microbiota. More generally, this study highlights specific as well as complex molecular interactions that shape the plant microbiota.
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20
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Zeyad MT, Tiwari P, Ansari WA, Kumar SC, Kumar M, Chakdar H, Srivastava AK, Singh UB, Saxena AK. Bio-priming with a consortium of Streptomyces araujoniae strains modulates defense response in chickpea against Fusarium wilt. Front Microbiol 2022; 13:998546. [PMID: 36160196 PMCID: PMC9493686 DOI: 10.3389/fmicb.2022.998546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 08/12/2022] [Indexed: 11/13/2022] Open
Abstract
Wilt caused by Fusarium oxysporum f. sp. ciceris (Foc) is one of the major diseases of chickpea affecting the potential yield significantly. Productivity and biotic stress resilience are both improved by the association and interaction of Streptomyces spp. with crop plants. In the present study, we evaluated two Streptomyces araujoniae strains (TN11 and TN19) for controlling the wilt of chickpea individually and as a consortium. The response of Foc challenged chickpea to inoculation with S. araujoniae TN11 and TN19 individually and as a consortium was recorded in terms of changes in physio-biochemical and expression of genes coding superoxide dismutase (SOD), peroxidase, and catalase. Priming with a consortium of TN11 and TN19 reduced the disease severity by 50–58% when challenged with Foc. Consortium primed-challenged plants recorded lower shoot dry weight to fresh weight ratio and root dry weight to fresh weight ratio as compared to challenged non-primed plants. The pathogen-challenged consortium primed plants recorded the highest accumulation of proline and electrolyte leakage. Similarly, total chlorophyll and carotenoids were recorded highest in the consortium treatment. Expression of genes coding SOD, peroxidase, and catalase was up-regulated which corroborated with higher activities of SOD, peroxidase, and catalase in consortium primed-challenged plants as compared to the challenged non-primed plants. Ethyl acetate extracts of TN11 and TN19 inhibited the growth of fungal pathogens viz., Fusarium oxysporum f. sp. ciceris. Macrophomina phaseolina, F. udum, and Sclerotinia sclerotiarum by 54–73%. LC–MS analyses of the extracts showed the presence of a variety of antifungal compounds like erucamide and valinomycin in TN11 and valinomycin and dinactin in TN19. These findings suggest that the consortium of two strains of S. araujoniae (TN11 and TN19) can modulate defense response in chickpea against wilt and can be explored as a biocontrol strategy.
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Liu J, Clarke JA, McCann S, Hillier NK, Tahlan K. Analysis of Streptomyces Volatilomes Using Global Molecular Networking Reveals the Presence of Metabolites with Diverse Biological Activities. Microbiol Spectr 2022; 10:e0055222. [PMID: 35900081 PMCID: PMC9431705 DOI: 10.1128/spectrum.00552-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 07/09/2022] [Indexed: 12/20/2022] Open
Abstract
Streptomyces species produce a wide variety of specialized metabolites, some of which are used for communication or competition for resources in their natural environments. In addition, many natural products used in medicine and industry are derived from Streptomyces, and there has been interest in their capacity to produce volatile organic compounds (VOCs) for different industrial and agricultural applications. Recently, a machine-learning workflow called MSHub/GNPS was developed, which enables auto-deconvolution of gas chromatography-mass spectrometry (GC-MS) data, molecular networking, and library search capabilities, but it has not been applied to Streptomyces volatilomes. In this study, 131 Streptomyces isolates from the island of Newfoundland were phylogenetically typed, and 37 were selected based on their phylogeny and growth characteristics for VOC analysis using both a user-guided (conventional) and an MSHub/GNPS-based approach. More VOCs were annotated by MSHub/GNPS than by the conventional method. The number of unknown VOCs detected by the two methods was higher than those annotated, suggesting that many novel compounds remain to be identified. The molecular network generated by GNPS can be used to guide the annotation of such unknown VOCs in future studies. However, the number of overlapping VOCs annotated by the two methods is relatively small, suggesting that a combination of analysis methods might be required for robust volatilome analysis. More than half of the VOCs annotated with high confidence by the two approaches are plant-associated, many with reported bioactivities such as insect behavior modulation. Details regarding the properties and reported functions of such VOCs are described. IMPORTANCE This study represents the first detailed analysis of Streptomyces volatilomes using MSHub/GNPS, which in combination with a routinely used conventional method led to many annotations. More VOCs could be annotated using MSHub/GNPS as compared to the conventional method, many of which have known antimicrobial, anticancer, and insect behavior-modulating activities. The identification of numerous plant-associated VOCs by both approaches in the current study suggests that their production could be a more widespread phenomenon by members of the genus, highlighting opportunities for their large-scale production using Streptomyces. Plant-associated VOCs with antimicrobial activities, such as 1-octen-3-ol, octanol, and phenylethyl alcohol, have potential applications as fumigants. Furthermore, many of the annotated VOCs are reported to influence insect behavior, alluding to a possible explanation for their production based on the functions of other recently described Streptomyces VOCs in dispersal and nutrient acquisition.
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Affiliation(s)
- Jingyu Liu
- Department of Biology, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
| | - Jody-Ann Clarke
- Department of Biology, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
| | - Sean McCann
- Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada
| | - N. Kirk Hillier
- Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada
| | - Kapil Tahlan
- Department of Biology, Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
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22
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Pérez-Corral DA, Ornelas-Paz JDJ, Olivas GI, Acosta-Muñiz CH, Salas-Marina MÁ, Berlanga-Reyes DI, Sepulveda DR, Mares-Ponce de León Y, Rios-Velasco C. Growth Promotion of Phaseolus vulgaris and Arabidopsis thaliana Seedlings by Streptomycetes Volatile Compounds. PLANTS (BASEL, SWITZERLAND) 2022; 11:875. [PMID: 35406854 PMCID: PMC9002626 DOI: 10.3390/plants11070875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/16/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
Streptomyces are recognized as antipathogenic agents and plant-growth-promoting rhizobacteria. The objective of this study was to evaluate the capacities of four antifungal Streptomyces strains to: produce the substances that are involved in plant growth; solubilize phosphates; and fix nitrogen. The effects of the volatile organic compounds (VOCs) that are emitted by these strains on the growth promotion of Arabidopsis thaliana and Phaseolus vulgaris L. (var. Pinto Saltillo) seedlings were also tested. All of the Streptomyces strains produced indole-3-acetic acid (IAA) (10.0 mg/L to 77.5 mg/L) and solubilized phosphates, but they did not fix nitrogen. In vitro assays showed that the VOCs from Streptomyces increased the shoot fresh weights (89-399%) and the root fresh weights (94-300%) in A. thaliana seedlings; however, these effects were less evident in P. vulgaris. In situ experiments showed that all the Streptomyces strains increased the shoot fresh weight (11.64-43.92%), the shoot length (11.39-29.01%), the root fresh weight (80.11-140.90%), the root length (40.06-59.01%), the hypocotyl diameter (up to 6.35%), and the chlorophyll content (up to 10.0%) in P. vulgaris seedlings. 3-Methyl-2-butanol had the highest effect among the ten pure VOCs on the growth promotion of A. thaliana seedlings. The tested Streptomyces strains favored biomass accumulation in A. thaliana and P. vulgaris seedlings.
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Affiliation(s)
- Daniel Alonso Pérez-Corral
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
| | - José de Jesús Ornelas-Paz
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
| | - Guadalupe Isela Olivas
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
| | - Carlos Horacio Acosta-Muñiz
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
| | - Miguel Ángel Salas-Marina
- División de Ingeniería, Universidad de Ciencias y Artes de Chiapas, Carretera Villacorzo-Ejido Monterrey Km 3.0., Tuxtla Gutiérrez C.P. 30520, Chiapas, Mexico;
| | - David Ignacio Berlanga-Reyes
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
| | - David Roberto Sepulveda
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
| | - Yericka Mares-Ponce de León
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
| | - Claudio Rios-Velasco
- Centro de Investigación en Alimentación y Desarrollo A.C., Unidad Cuauhtémoc, Av. Río Conchos, S/N, Parque Industrial, Cd. Cuauhtémoc C.P. 31570, Chihuahua, Mexico; (D.A.P.-C.); (J.d.J.O.-P.); (G.I.O.); (C.H.A.-M.); (D.I.B.-R.); (D.R.S.); (Y.M.-P.d.L.)
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23
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Proenca AM, Oliveira MM, Neves PFR, Giongo A, de Oliveira RR, Ott CT, Marconatto L, de Barros Neto HMC, Ketzer JMM, Medina-Silva R. Genomic, biochemical, and phylogenetic evaluation of bacteria isolated from deep-sea sediment harboring methane hydrates. Arch Microbiol 2022; 204:205. [PMID: 35266047 DOI: 10.1007/s00203-022-02814-z] [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: 11/12/2021] [Revised: 02/04/2022] [Accepted: 02/18/2022] [Indexed: 11/25/2022]
Abstract
Over half of the organic carbon on Earth's surface is trapped in marine sediment as methane hydrates. Ocean warming causes hydrate dissociation and methane leakage to the water column, rendering the characterization of microbes from hydrate depositions a pressing matter. Through genomic, phylogenetic, and biochemical assays, we characterize the first microorganisms isolated from the Rio Grande Cone (Brazil), reservoir responsible for massive methane releases to the water column. From sediment harboring rich benthic communities, we obtained 43 strains of Brevibacillus sp., Paenibacillus sp. and groups of Bacillus sp. Methane-enriched samples yielded strains of the Pseudomonas fluorescens complex, exhibiting fluorescent siderophore production and broad multi-carbon catabolism. Genomic characterization of a novel Pseudomonas sp. strain indicated 32 genes not identified in the closest related type-species, including proteins involved with mercury resistance. Our results provide phylogenetic and genomic insights on the first bacterial isolates retrieved from a poorly explored region of the South Atlantic Ocean.
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Affiliation(s)
- Audrey Menegaz Proenca
- Geobiology Research Group, Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.,Immunology and Microbiology Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.,Institute of Biology, Freie Universität Berlin, Berlin, Germany
| | - Maiara Monteiro Oliveira
- Geobiology Research Group, Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.,Immunology and Microbiology Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Paula Fernanda Ribas Neves
- Geobiology Research Group, Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.,Immunology and Microbiology Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Adriana Giongo
- Geobiology Research Group, Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Rafael Rodrigues de Oliveira
- Geobiology Research Group, Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Carolina Telles Ott
- Immunology and Microbiology Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | - Letícia Marconatto
- Geobiology Research Group, Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil
| | | | | | - Renata Medina-Silva
- Geobiology Research Group, Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil. .,Immunology and Microbiology Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.
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24
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Alves NSF, Kaory Inoue SG, Carneiro AR, Albino UB, Setzer WN, Maia JG, Andrade EH, da Silva JKR. Variation in Peperomia pellucida growth and secondary metabolism after rhizobacteria inoculation. PLoS One 2022; 17:e0262794. [PMID: 35061852 PMCID: PMC8785609 DOI: 10.1371/journal.pone.0262794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 01/05/2022] [Indexed: 01/31/2023] Open
Abstract
Peperomia pellucida L. Kunth is a herb well-known for its secondary metabolites (SM) with biological potential. In this study, the variations in the SM of P. pellucida during association with rhizobacteria were evaluated. Plants were inoculated with Enterobacter asburiae and Klebsiella variicola, which were identified by sequencing of the 16S rRNA gene. The data were evaluated at 7, 21, and 30-day post inoculation (dpi). Plant-bacteria symbiosis improved plant growth and weight. Total phenolic content and phenylalanine ammonia lyase enzyme activity had a significant increase mainly at 30 dpi. P. pellucida was mainly composed of phenylpropanoids (37.30-52.28%) and sesquiterpene hydrocarbons (39.28-49.42%). The phenylpropanoid derivative 2,4,5-trimethoxy-styrene (ArC2), the sesquiterpene hydrocarbon ishwarane, and the phenylpropanoid dillapiole were the major compounds. Principal component analysis (PCA) of the classes and compounds ≥ 2.0% indicated that plants colonized by E. asburiae had a reduction in the content of sesquiterpene hydrocarbons and an increase in phenylpropanoids and derivatives. Plants treated with this bacterium also had an increase in the content of 2,4,5-trimethoxystyrene at 30 dpi. Plants inoculated with K. variicola had significant increases only in the content of the classes monoterpene hydrocarbons and 'other compounds' (hydrocarbons, esters, ketones, etc.). These data suggest that the production of plant secondary metabolites can be modified depending on the type of rhizobacteria inoculated.
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Affiliation(s)
| | | | - Adriana Ribeiro Carneiro
- Programa de Pós-Graduação em Biotecnologia, Universidade Federal do Pará,
Belém, Brazil
- Faculdade de Biotecnologia, Universidade Federal do Pará, Belém,
Brazil
| | | | - William N. Setzer
- Department of Chemistry, University of Alabama in Huntsville, Huntsville,
AL, United States of America
- Aromatic Plant Research Center, Lehi, UT, United States of
America
| | - José Guilherme Maia
- Programa de Pós-Graduação em Química, Universidade Federal do Pará,
Belém, Brazil
| | | | - Joyce Kelly R. da Silva
- Programa de Pós-Graduação em Biotecnologia, Universidade Federal do Pará,
Belém, Brazil
- Faculdade de Biotecnologia, Universidade Federal do Pará, Belém,
Brazil
- Programa de Pós-Graduação em Química, Universidade Federal do Pará,
Belém, Brazil
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25
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Dave A, Ingle S. Potential of Streptomyces and Its Secondary Metabolites for Biocontrol of Fungal Plant Pathogens. Fungal Biol 2022. [DOI: 10.1007/978-3-031-04805-0_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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26
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Toral L, Rodríguez M, Martínez-Checa F, Montaño A, Cortés-Delgado A, Smolinska A, Llamas I, Sampedro I. Identification of Volatile Organic Compounds in Extremophilic Bacteria and Their Effective Use in Biocontrol of Postharvest Fungal Phytopathogens. Front Microbiol 2021; 12:773092. [PMID: 34867910 PMCID: PMC8633403 DOI: 10.3389/fmicb.2021.773092] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 10/11/2021] [Indexed: 11/17/2022] Open
Abstract
Phytopathogenic fungal growth in postharvest fruits and vegetables is responsible for 20-25% of production losses. Volatile organic compounds (VOCs) have been gaining importance in the food industry as a safe and ecofriendly alternative to pesticides for combating these phytopathogenic fungi. In this study, we analysed the ability of some VOCs produced by strains of the genera Bacillus, Peribacillus, Pseudomonas, Psychrobacillus and Staphylococcus to inhibit the growth of Alternaria alternata, Botrytis cinerea, Fusarium oxysporum, Fusarium solani, Monilinia fructicola, Monilinia laxa and Sclerotinia sclerotiorum, in vitro and in vivo. We analysed bacterial VOCs by using GC/MS and 87 volatile compounds were identified, in particular acetoin, acetic acid, 2,3-butanediol, isopentanol, dimethyl disulphide and isopentyl isobutanoate. In vitro growth inhibition assays and in vivo experiments using cherry fruits showed that the best producers of VOCs, Bacillus atrophaeus L193, Bacillus velezensis XT1 and Psychrobacillus vulpis Z8, exhibited the highest antifungal activity against B. cinerea, M. fructicola and M. laxa, which highlights the potential of these strains to control postharvest diseases. Transmission electron microscopy micrographs of bacterial VOC-treated fungi clearly showed antifungal activity which led to an intense degeneration of cellular components of mycelium and cell death.
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Affiliation(s)
- Laura Toral
- Xtrem Biotech S.L., European Business Innovation Center, Avenida de la Innovación, Granada, Spain
| | - Miguel Rodríguez
- Department of Microbiology, Faculty of Pharmacy, Campus de Cartuja s/n, Granada, Spain
- Biomedical Research Center (CIBM), Avenida del Conocimiento s/n, Granada, Spain
| | - Fernando Martínez-Checa
- Department of Microbiology, Faculty of Pharmacy, Campus de Cartuja s/n, Granada, Spain
- Biomedical Research Center (CIBM), Avenida del Conocimiento s/n, Granada, Spain
| | - Alfredo Montaño
- Department of Food Biotechnology, Instituto de la Grasa, Sevilla, Spain
| | | | - Agnieszka Smolinska
- Department of Pharmacology and Toxicology, Maastricht University, Maastricht, Netherlands
| | - Inmaculada Llamas
- Department of Microbiology, Faculty of Pharmacy, Campus de Cartuja s/n, Granada, Spain
- Biomedical Research Center (CIBM), Avenida del Conocimiento s/n, Granada, Spain
| | - Inmaculada Sampedro
- Department of Microbiology, Faculty of Pharmacy, Campus de Cartuja s/n, Granada, Spain
- Biomedical Research Center (CIBM), Avenida del Conocimiento s/n, Granada, Spain
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27
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Zhang L, Zhang H, Huang Y, Peng J, Xie J, Wang W. Isolation and Evaluation of Rhizosphere Actinomycetes With Potential Application for Biocontrolling Fusarium Wilt of Banana Caused by Fusarium oxysporum f. sp. cubense Tropical Race 4. Front Microbiol 2021; 12:763038. [PMID: 34759913 PMCID: PMC8573349 DOI: 10.3389/fmicb.2021.763038] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 09/20/2021] [Indexed: 11/27/2022] Open
Abstract
Fusarium wilt of banana caused by Fusarium oxysporum f. sp. cubense tropical race 4 (TR4) is globally one of the most destructive soil-borne fungal diseases. Biological control using environmental microorganisms is considered as an alternative and sustainable strategy. Actinomycetes have the potential to explore biocontrol agents due to their production of diverse metabolites. The isolation and identification of high-efficiency and broad-spectrum antagonistic actinomycetes are the key for the application of biocontrol agents. In the present study, 60 actinomycetes were obtained from the rhizosphere soil of Machilus pingii in the primitive ecological natural reserve of Hainan province, China. Seventeen isolates and their extracts exhibited significant antifungal activity against F. oxysporum TR4. Particularly, strain BITDG-11 with the strongest inhibition ability had a broad-spectrum antifungal activity. The assay of its physiological and biochemical profiles showed that strain BITDG-11 had the ability to produce IAA and siderophores and had a positive response to gelatin liquefaction and nitrate reduction. Enzyme activities of chitinase, β-1,3-glucanase, lipase, and urease were also detected. Average nucleotide identity calculated by comparison with the standard strain genome of Streptomyces albospinus JCM3399 was 86.55% below the novel species threshold, suggesting that the strain could be a novel species. In addition, Streptomyces BITDG-11 obviously reduced the disease index of banana plantlets and promoted plant growth at 45 days post inoculation. The higher and lasting expression levels of defense genes and activities of antioxidant enzymes were induced in the roots of banana. Genome sequencing revealed that the Streptomyces BITDG-11 chromosome contained large numbers of conserved biosynthesis gene clusters encoding terpenes, non-ribosomal peptides, polyketides, siderophores, and ectoines. Fifteen bioactive secondary metabolites were further identified from Streptomyces BITDG-11 extract by gas chromatography-mass spectrometry. Dibutyl phthalate demonstrating a strong antifungal activity was the major compound with the highest peak area. Hence, Streptomyces sp. BITDG-11 has a great potential to become an essential constituent of modern agricultural practice as biofertilizers and biocontrol agents.
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Affiliation(s)
- Lu Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou, China
| | - Huixi Zhang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Yating Huang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou, China
| | - Jun Peng
- Institute of Environment and Plant Protection, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Jianghui Xie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Wei Wang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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28
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Le KD, Kim J, Nguyen HT, Yu NH, Park AR, Lee CW, Kim JC. Streptomyces sp. JCK-6131 Protects Plants Against Bacterial and Fungal Diseases via Two Mechanisms. FRONTIERS IN PLANT SCIENCE 2021; 12:726266. [PMID: 34603354 PMCID: PMC8479116 DOI: 10.3389/fpls.2021.726266] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 07/30/2021] [Indexed: 05/30/2023]
Abstract
Plant bacterial and fungal diseases cause significant agricultural losses and need to be controlled. Beneficial bacteria are promising candidates for controlling these diseases. In this study, Streptomyces sp. JCK-6131 exhibited broad-spectrum antagonistic activity against various phytopathogenic bacteria and fungi. In vitro assays showed that the fermentation filtrate of JCK-6131 inhibited the growth of bacteria and fungi with minimum concentration inhibitory (MIC) values of 0.31-10% and 0.31-1.25%, respectively. In the in vivo experiments, treatment with JCK-6131 effectively suppressed the development of apple fire blight, tomato bacterial wilt, and cucumber Fusarium wilt in a dose-dependent manner. RP-HPLC and ESI-MS/MS analyses indicated that JCK-6131 can produce several antimicrobial compounds, three of which were identified as streptothricin E acid, streptothricin D, and 12-carbamoyl streptothricin D. In addition, the disease control efficacy of the foliar application of JCK-6131 against tomato bacterial wilt was similar to that of the soil drench application, indicating that JCK-6131 could enhance defense resistance in plants. Molecular studies on tomato plants showed that JCK-6131 treatment induced the expression of the pathogenesis-related (PR) genes PR1, PR3, PR5, and PR12, suggesting the simultaneous activation of the salicylate (SA) and jasmonate (JA) signaling pathways. The transcription levels of PR genes increased earlier and were higher in treated plants than in untreated plants following Ralstonia solanacearum infection. These results indicate that Streptomyces sp. JCK-6131 can effectively control various plant bacterial and fungal diseases via two distinct mechanisms of antibiosis and induced resistance.
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Affiliation(s)
- Khanh Duy Le
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
| | - Jeun Kim
- Department of Chemistry, Chonnam National University, Gwangju, South Korea
| | - Hoa Thi Nguyen
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
| | - Nan Hee Yu
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
| | - Ae Ran Park
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
| | - Chul Won Lee
- Department of Chemistry, Chonnam National University, Gwangju, South Korea
| | - Jin-Cheol Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
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Pacios-Michelena S, Aguilar González CN, Alvarez-Perez OB, Rodriguez-Herrera R, Chávez-González M, Arredondo Valdés R, Ascacio Valdés JA, Govea Salas M, Ilyina A. Application of Streptomyces Antimicrobial Compounds for the Control of Phytopathogens. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.696518] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
One of the relevant problems in today's agriculture is related to phytopathogenic microorganisms that cause between 30–40% of crop losses. Synthetic chemical pesticides and antibiotics have brought human and environmental health problems and microbial resistance to these treatments. So, the search for natural alternatives is necessary. The genus Streptomyces have broad biotechnological potential, being a promising candidate for the biocontrol of phytopathogenic microorganisms. The efficacy of some species of this genus in plant protection and their continued presence in the intensely competitive rhizosphere is due to its great potential to produce a wide variety of soluble bioactive secondary metabolites and volatile organic compounds. However, more attention is still needed to develop novel formulations that could increase the shelf life of streptomycetes, ensuring their efficacy as a microbial pesticide. In this sense, encapsulation offers an advantageous and environmentally friendly option. The present review aims to describe some phytopathogenic microorganisms with economic importance that require biological control. In addition, it focuses mainly on the Streptomyces genus as a great producer of secondary metabolites that act on other microorganisms and plants, exercising its role as biological control. The review also covers some strategies and products based on Streptomyces and the problems of its application in the field.
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Deep-Sea Actinobacteria Mitigate Salinity Stress in Tomato Seedlings and Their Biosafety Testing. PLANTS 2021; 10:plants10081687. [PMID: 34451732 PMCID: PMC8401925 DOI: 10.3390/plants10081687] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/04/2021] [Accepted: 08/11/2021] [Indexed: 12/13/2022]
Abstract
Soil salinity is an enormous problem affecting global agricultural productivity. Deep-sea actinobacteria are interesting due to their salt tolerance mechanisms. In the present study, we aim to determine the ability of deep-sea Dermacoccus (D. barathri MT2.1T and D. profundi MT2.2T) to promote tomato seedlings under 150 mM NaCl compared with the terrestrial strain D. nishinomiyaensis DSM20448T. All strains exhibit in vitro plant growth-promoting traits of indole-3-acetic acid production, phosphate solubilization, and siderophore production. Tomato seedlings inoculated with D. barathri MT2.1T showed higher growth parameters (shoot and root length, dry weight, and chlorophyll content) than non-inoculated tomato and the terrestrial strain under 150 mM NaCl. In addition, hydrogen peroxide (H2O2) in leaves of tomatoes inoculated with deep-sea Dermacoccus was lower than the control seedlings. This observation suggested that deep-sea Dermacoccus mitigated salt stress by reducing oxidative stress caused by hydrogen peroxide. D. barathri MT2.1T showed no harmful effects on Caenorhabditis elegans, Daphnia magna, Eisenia foetida, and Escherichia coli MC4100 in biosafety tests. This evidence suggests that D. barathri MT2.1T would be safe for use in the environment. Our results highlight the potential of deep-sea Dermacoccus as a plant growth promoter for tomatoes under salinity stress.
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Nozari RM, Ortolan F, Astarita LV, Santarém ER. Streptomyces spp. enhance vegetative growth of maize plants under saline stress. Braz J Microbiol 2021; 52:1371-1383. [PMID: 33834385 DOI: 10.1007/s42770-021-00480-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 03/29/2021] [Indexed: 11/30/2022] Open
Abstract
Saline stress is one of the abiotic stresses that most compromises the yield of crops and can be mitigated by plant growth-promoting rhizobacteria (PGPR). This work characterized rhizobacteria isolates from the genus Streptomyces as PGPR and evaluated their role on growth and alleviation of the effects caused by saline stress in maize (Zea mays L.). Production of indolic compounds (IC), siderophores, ACC deaminase, phenazines, and promotion of plant growth were determined to characterize bacterial isolates. Salinity tolerance was accessed by culturing the Streptomyces isolates under NaCl increasing concentrations (0-300 mM). Four Streptomyces isolates exhibiting PGPR traits and salinity tolerance were selected and their effect on tolerance of maize plants to saline stress was evaluated. Plants obtained from bacterized seeds and submitted to 100 and 300 mM NaCl were used. All Streptomyces spp. produced IC and siderophores, CLV178 being the best producer of these two compounds. ACC deaminase was detected in six of the 10 isolates (CLV95, CLV97, CLV127, CLV179, CLV193, and CLV205), while phenazines were found only in CLV186 and CLV194. All isolates were tolerant to salinity, growing at concentrations up to 300 mM NaCl, with exception of CLV188. Increased concentrations of IC were detected in most of the isolates exposed to salinity. CLV97 and CLV179 significantly promoted growth of roots and leaves of maize plants and attenuated the negative effects of salinity on plant growth. Root colonization by Streptomyces spp. was confirmed in plants cultivated 20 days under saline stress.
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Affiliation(s)
- Rafaela Mendonça Nozari
- Plant Biotechnology Laboratory, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS, Av. Ipiranga, 6681, Partenon, Porto Alegre, RS, 90619-900, Brazil
| | - Francieli Ortolan
- Plant Biotechnology Laboratory, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS, Av. Ipiranga, 6681, Partenon, Porto Alegre, RS, 90619-900, Brazil
| | - Leandro Vieira Astarita
- Plant Biotechnology Laboratory, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS, Av. Ipiranga, 6681, Partenon, Porto Alegre, RS, 90619-900, Brazil
| | - Eliane Romanato Santarém
- Plant Biotechnology Laboratory, School of Health and Life Sciences, Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS, Av. Ipiranga, 6681, Partenon, Porto Alegre, RS, 90619-900, Brazil.
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Biocontrol of Two Bacterial Inoculant Strains and Their Effects on the Rhizosphere Microbial Community of Field-Grown Wheat. BIOMED RESEARCH INTERNATIONAL 2021; 2021:8835275. [PMID: 33506038 PMCID: PMC7811418 DOI: 10.1155/2021/8835275] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/04/2020] [Accepted: 12/26/2020] [Indexed: 11/23/2022]
Abstract
Biocontrol by inoculation with beneficial microbes is a proven strategy for reducing the negative effect of soil-borne pathogens. We evaluated the effects of microbial inoculants BIO-1 and BIO-2 in reducing soil-borne wheat diseases and in influencing wheat rhizosphere microbial community composition in a plot test. The experimental design consisted of three treatments: (1) Fusarium graminearum F0609 (CK), (2) F. graminearum + BIO-1 (T1), and (3) F. graminearum F0609 + BIO-2 (T2). The results of the wheat disease investigation showed that the relative efficacies of BIO-1 and BIO-2 were up to 82.5% and 83.9%, respectively. Illumina MiSeq sequencing revealed that bacterial abundance and diversity were significantly higher (P < 0.05) in the treatment groups (T1 and T2) than in the control, with significantly decreased fungal diversity in the T2 group. Principal coordinates and hierarchical clustering analyses revealed that the bacterial and fungal communities were distinctly separated between the treatment and control groups. Bacterial community composition analysis demonstrated that beneficial microbes, such as Sphingomonas, Bacillus, Nocardioides, Rhizobium, Streptomyces, Pseudomonas, and Microbacterium, were more abundant in the treatment groups than in the control group. Fungal community composition analysis revealed that the relative abundance of the phytopathogenic fungi Fusarium and Gibberella decreased and that the well-known beneficial fungi Chaetomium, Penicillium, and Humicola were more abundant in the treatment groups than in the control group. Overall, these results confirm that beneficial microbes accumulate more easily in the wheat rhizosphere following application of BIO-1 and BIO-2 and that the relative abundance of phytopathogenic fungi decreased compared with that in the control group.
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Antimicrobial activity screening of rhizosphere soil bacteria from tomato and genome-based analysis of their antimicrobial biosynthetic potential. BMC Genomics 2021; 22:29. [PMID: 33413100 PMCID: PMC7789753 DOI: 10.1186/s12864-020-07346-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 12/22/2020] [Indexed: 12/16/2022] Open
Abstract
Background Tomato plant growth is frequently hampered by a high susceptibility to pests and diseases. Traditional chemical control causes a serious impact on both the environment and human health. Therefore, seeking environment-friendly and cost-effective green methods in agricultural production becomes crucial nowadays. Plant Growth Promoting Rhizobacteria (PGPR) can promote plant growth through biological activity. Their use is considered to be a promising sustainable approach for crop growth. Moreover, a vast number of biosynthetic gene clusters (BGCs) for secondary metabolite production are being revealed in PGPR, which helps to find potential anti-microbial activities for tomato disease control. Results We isolated 181 Bacillus-like strains from healthy tomato, rhizosphere soil, and tomato tissues. In vitro antagonistic assays revealed that 34 Bacillus strains have antimicrobial activity against Erwinia carotovora, Pseudomonas syringae; Rhizoctonia solani; Botrytis cinerea; Verticillium dahliae and Phytophthora infestans. The genomes of 10 Bacillus and Paenibacillus strains with good antagonistic activity were sequenced. Via genome mining approaches, we identified 120 BGCs encoding NRPs, PKs-NRPs, PKs, terpenes and bacteriocins, including known compounds such as fengycin, surfactin, bacillibactin, subtilin, etc. In addition, several novel BGCs were identified. We discovered that the NRPs and PKs-NRPs BGCs in Bacillus species are encoding highly conserved known compounds as well as various novel variants. Conclusions This study highlights the great number of varieties of BGCs in Bacillus strains. These findings pave the road for future usage of Bacillus strains as biocontrol agents for tomato disease control and are a resource arsenal for novel antimicrobial discovery. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-020-07346-8.
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Liao H, Fan H, Li Y, Yao H. Influence of reductive soil disinfestation or biochar amendment on bacterial communities and their utilization of plant-derived carbon in the rhizosphere of tomato. Appl Microbiol Biotechnol 2021; 105:815-825. [PMID: 33386895 DOI: 10.1007/s00253-020-11036-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 11/11/2020] [Accepted: 11/23/2020] [Indexed: 11/24/2022]
Abstract
Root-associated microorganisms play an important role in plant nutrition and productivity. However, our understanding of how a plant-microbiome system responds to pre-planting soil management remains limited. Here, continuous labeling with 13CO2 gas combined with stable isotope probing (SIP) was applied to explore bacterial utilization of plant-derived carbon (C) in the tomato rhizosphere as affected by biochar amendment or reductive soil disinfestation (RSD). Our results showed that RSD treatment strongly shaped the soil bacterial community composition, while biochar soil amendment had little impact on the community in the rhizosphere of tomato. We observed that the bacterial community in the RSD treatment, which actively utilized plant-derived C, belonged to various phyla (i.e., Proteobacteria, Cyanobacteria, Verrucomicrobia, and Acidobacteria), while the genus Streptomyces (phylum Actinobacteria) was the main bacterial taxa that actively utilized plant-derived C in the biochar and control treatments. This study provides evidence that biochar application or RSD pre-planting soil management practices induced distinct bacterial utilization of plant-derived C, which may in turn regulate plant productivity in agricultural systems. KEY POINTS: • Genus Streptomyces was the main bacterial group utilizing plant-derived carbon in both control and biochar treatments. • Reductive soil disinfestation altered bacterial utilization of plant-derived carbon. • Biochar did not alter the composition of the bacterial communities but had more labeled bacterial taxa utilizing plant-derived carbon.
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Affiliation(s)
- Hongkai Liao
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China.,Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, 315800, Ningbo, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.,Guizhou Provincial Key Laboratory of Mountain Environment, Guizhou Normal University, Guiyang, 550001, People's Republic of China
| | - Haoxin Fan
- Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430073, People's Republic of China
| | - Yaying Li
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China.,Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, 315800, Ningbo, People's Republic of China
| | - Huaiying Yao
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China. .,Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, 315800, Ningbo, People's Republic of China. .,Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430073, People's Republic of China.
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Biostimulant-Treated Seedlings under Sustainable Agriculture: A Global Perspective Facing Climate Change. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy11010014] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The primary objectives of modern agriculture includes the environmental sustainability, low production costs, improved plants’ resilience to various biotic and abiotic stresses, and high sowing seed value. Delayed and inconsistent field emergence poses a significant threat in the production of agri-crop, especially during drought and adverse weather conditions. To open new routes of nutrients’ acquisition and revolutionizing the adapted solutions, stewardship plans will be needed to address these questions. One approach is the identification of plant based bioactive molecules capable of altering plant metabolism pathways which may enhance plant performance in a brief period of time and in a cost-effective manner. A biostimulant is a plant material, microorganism, or any other organic compound that not only improves the nutritional aspects, vitality, general health but also enhances the seed quality performance. They may be effectively utilized in both horticultural and cereal crops. The biologically active substances in biostimulant biopreparations are protein hydrolysates (PHs), seaweed extracts, fulvic acids, humic acids, nitrogenous compounds, beneficial bacterial, and fungal agents. In this review, the state of the art and future prospects for biostimulant seedlings are reported and discussed. Biostimulants have been gaining interest as they stimulate crop physiology and biochemistry such as the ratio of leaf photosynthetic pigments (carotenoids and chlorophyll), enhanced antioxidant potential, tremendous root growth, improved nutrient use efficiency (NUE), and reduced fertilizers consumption. Thus, all these properties make the biostimulants fit for internal market operations. Furthermore, a special consideration has been given to the application of biostimulants in intensive agricultural systems that minimize the fertilizers’ usage without affecting quality and yield along with the limits imposed by European Union (EU) regulations.
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Raveau R, Fontaine J, Hijri M, Lounès-Hadj Sahraoui A. The Aromatic Plant Clary Sage Shaped Bacterial Communities in the Roots and in the Trace Element-Contaminated Soil More Than Mycorrhizal Inoculation - A Two-Year Monitoring Field Trial. Front Microbiol 2020; 11:586050. [PMID: 33424786 PMCID: PMC7794003 DOI: 10.3389/fmicb.2020.586050] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/14/2020] [Indexed: 01/04/2023] Open
Abstract
To cope with soil contamination by trace elements (TE), phytomanagement has attracted much attention as being an eco-friendly and cost-effective green approach. In this context, aromatic plants could represent a good option not only to immobilize TE, but also to use their biomass to extract essential oils, resulting in high added-value products suitable for non-food valorization. However, the influence of aromatic plants cultivation on the bacterial community structure and functioning in the rhizosphere microbiota remains unknown. Thus, the present study aims at determining in TE-aged contaminated soil (Pb - 394 ppm, Zn - 443 ppm, and Cd - 7ppm, respectively, 11, 6, and 17 times higher than the ordinary amounts in regional agricultural soils) the effects of perennial clary sage (Salvia sclarea L.) cultivation, during two successive years of growth and inoculated with arbuscular mycorrhizal fungi, on rhizosphere bacterial diversity and community structure. Illumina MiSeq amplicon sequencing targeting bacterial 16S rRNA gene was used to assess bacterial diversity and community structure changes. Bioinformatic analysis of sequencing datasets resulted in 4691 and 2728 bacterial Amplicon Sequence Variants (ASVs) in soil and root biotopes, respectively. Our findings have shown that the cultivation of clary sage displayed a significant year-to-year effect, on both bacterial richness and community structures. We found that the abundance of plant-growth promoting rhizobacteria significantly increased in roots during the second growing season. However, we didn't observe any significant effect of mycorrhizal inoculation neither on bacterial diversity nor on community structure. Our study brings new evidence in TE-contaminated areas of the effect of a vegetation cover with clary sage cultivation on the microbial soil functioning.
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Affiliation(s)
- Robin Raveau
- Université du Littoral Côte d’Opale, Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Calais, France
| | - Joël Fontaine
- Université du Littoral Côte d’Opale, Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Calais, France
| | - Mohamed Hijri
- Institut de Recherche en Biologie Végétale (IRBV) de l’Université de Montréal, Montreal, QC, Canada
- AgroBioSciences, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco
| | - Anissa Lounès-Hadj Sahraoui
- Université du Littoral Côte d’Opale, Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Calais, France
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Horstmann JL, Dias MP, Ortolan F, Medina-Silva R, Astarita LV, Santarém ER. Streptomyces sp. CLV45 from Fabaceae rhizosphere benefits growth of soybean plants. Braz J Microbiol 2020; 51:1861-1871. [PMID: 32529561 PMCID: PMC7688731 DOI: 10.1007/s42770-020-00301-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 05/16/2020] [Indexed: 01/21/2023] Open
Abstract
Plant growth-promoting bacteria such as Streptomyces are an attractive alternative for increasing the sustainability of agricultural systems. In this study, Streptomyces isolates obtained from rhizosphere soil of plants in the family Fabaceae were characterized for their plant growth-promoting traits, including the production of siderophores, 1-aminocyclopropane-1-carboxylate (ACC) deaminase, indole-3-acetic acid (IAA), and phenazines. Soybean seeds were bacterized with selected isolates to test growth promotion. All isolates produced IAA, and the isolate CLV45 was the most efficient, reaching 398.53 mg of IAA per gram of cells. CLV41, CLV45, and CLV46 showed high activity for ACC deaminase whereas CLV42, CLV44, and CLV46 were efficient in siderophore production. Pyocyanin was detected in all isolates; CLV41, CLV43, and CLV45 produced phenazine-carboxylic acid as well. Selected for IAA and ACC deaminase production combined with production of siderophores and phenazines, CLV42, CLV44, and CLV45 were tested for their growth promotion potential. Seed bacterization with CLV45 resulted in plants with increased shoot growth (36.63%) and dry mass (17.97%) compared to control plants. Results suggest that moderate or high levels of auxin and ACC deaminase production by the isolate CLV45 positively affected the growth of soybean plants, making it a strong candidate for further studies on biofertilizer formulation.
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Affiliation(s)
- Juliana Lopes Horstmann
- Escola de Ciências da Saúde e da Vida, Laboratório de Biotecnologia Vegetal, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681, Porto Alegre, Rio Grande do Sul, 90619-900, Brazil
| | - Maila Pacheco Dias
- Escola de Ciências da Saúde e da Vida, Laboratório de Biotecnologia Vegetal, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681, Porto Alegre, Rio Grande do Sul, 90619-900, Brazil
| | - Francieli Ortolan
- Escola de Ciências da Saúde e da Vida, Laboratório de Biotecnologia Vegetal, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681, Porto Alegre, Rio Grande do Sul, 90619-900, Brazil
| | - Renata Medina-Silva
- Escola de Ciências da Saúde e da Vida, Laboratório de Imunologia e Microbiologia, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Leandro Vieira Astarita
- Escola de Ciências da Saúde e da Vida, Laboratório de Biotecnologia Vegetal, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681, Porto Alegre, Rio Grande do Sul, 90619-900, Brazil
| | - Eliane Romanato Santarém
- Escola de Ciências da Saúde e da Vida, Laboratório de Biotecnologia Vegetal, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681, Porto Alegre, Rio Grande do Sul, 90619-900, Brazil.
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Hu D, Li S, Li Y, Peng J, Wei X, Ma J, Zhang C, Jia N, Wang E, Wang Z. Streptomyces sp. strain TOR3209: a rhizosphere bacterium promoting growth of tomato by affecting the rhizosphere microbial community. Sci Rep 2020; 10:20132. [PMID: 33208762 PMCID: PMC7675979 DOI: 10.1038/s41598-020-76887-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 10/30/2020] [Indexed: 12/29/2022] Open
Abstract
Aiming at revealing the possible mechanism of its growth promoting effect on tomato, the correlations among Streptomyces sp. TOR3209 inoculation, rhizobacteriome, and tomato growth/production traits were investigated in this study. By analyses of Illumina sequencing and plate coating, differences in rhizosphere microbial communities were found in different growth stages and distinct inoculation treatments. The plant biomass/fruit yields and relative abundances of families Flavobacteriaceae, Sphingobacteriaceae, Polyangiaceae and Enterobacteriaceae in treatments T (tomato inoculated with TOR3209) and TF (tomato inoculated with TOR3209 + organic fertilizer) were higher than that in the controls (CK and CK+ organic fertilizer), respectively. The analysis of Metastats and LEfSe revealed that the genera Flavobacterium and Sorangium in seedling stage, Klebsiella in flowering stage, Collimonas in early fruit setting stage, and genera Micrococcaceae, Pontibacte and Adhaeribacter in late fruit setting stage were the most representative rhizobacteria that positively responded to TOR3209 inoculation. By cultivation method, five bacterial strains positively correlated to TOR3209 inoculation were isolated from rhizosphere and root endosphere, which were identified as tomato growth promoters affiliated to Enterobacter sp., Arthrobacter sp., Bacillus subtilis, Rhizobium sp. and Bacillus velezensis. In pot experiment, TOR3209 and B. velezensis WSW007 showed joint promotion to tomato production, while the abundance of inoculated TOR3209 was dramatically decreased in rhizosphere along the growth of tomato. Conclusively, TOR3209 might promote the tomato production via changing of microbial community in rhizosphere. These findings provide a better understanding of the interactions among PGPR in plant promotion.
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Affiliation(s)
- Dong Hu
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Shuhong Li
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Ying Li
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Jieli Peng
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Xiaoyan Wei
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Jia Ma
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Cuimian Zhang
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Nan Jia
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China
| | - Entao Wang
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, C.P. 11340, Mexico City, Mexico
| | - Zhanwu Wang
- Key Laboratory of Plants Genetic Engineering Center, Institute of Genetics and Physiology (Hebei Agricultural Products Quality and Safety Research Center), Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei, 050000, People's Republic of China.
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Zhang J, Chen J, Hu L, Jia R, Ma Q, Tang J, Wang Y. Antagonistic action of Streptomyces pratensis S10 on Fusarium graminearum and its complete genome sequence. Environ Microbiol 2020; 23:1925-1940. [PMID: 33073508 DOI: 10.1111/1462-2920.15282] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 10/15/2020] [Indexed: 12/19/2022]
Abstract
Wheat scab, mainly caused by Fusarium graminearum, can decrease wheat yield and grain quality. Chemical pesticides are currently the main control method but have an inevitable negative consequence on the environment and in food safety. This research studies a promising substitute, Streptomyces pratensis S10, which was isolated from tomato leaf mould and shows a significant inhibition effect on F. graminearum based on antagonism assays. The biocontrol mechanism is studied by enhanced green fluorescent protein labelling, quantitative real-time PCR, the Doskochilova 8 solvents system test and complete genome sequencing. Strain S10 can colonize in the wheat root, control wheat scab and decrease deoxynivalenol (DON) content. The control effects in vitro, planta and the plot experiments were 92.86%, 68.67% and 40.87% to 86.62%, respectively. S10 decreased DON content by inhibiting the mycelium growth and DON synthesis gene expression. The active substances of the S10 secondary metabolites had a high-temperature resistance and 29 putative biosynthetic gene clusters in its genome. The S10 control mechanism is multivariate, which shows potential in controlling wheat scab.
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Affiliation(s)
- Jing Zhang
- College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Jing Chen
- College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Lifang Hu
- College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Ruimin Jia
- College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Qing Ma
- College of Plant Protection, Northwest A&F University, Xianyang, China
| | - Jiangjiang Tang
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Xianyang, China
| | - Yang Wang
- College of Plant Protection, Northwest A&F University, Xianyang, China
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Shariffah-Muzaimah SA, Idris AS, Nur-Rashyeda R, Naidu Y, ZainolHilmi NH, Norman K. Impact of pre-inoculating soil with Streptomyces sp. GanoSA1 on oil palm growth and Ganoderma disease development. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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De Hita D, Fuentes M, Zamarreño AM, Ruiz Y, Garcia-Mina JM. Culturable Bacterial Endophytes From Sedimentary Humic Acid-Treated Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:837. [PMID: 32636861 PMCID: PMC7316998 DOI: 10.3389/fpls.2020.00837] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 05/25/2020] [Indexed: 05/14/2023]
Abstract
The global decrease in soil fertility leads to a new agricultural scenario where eco-friendly solutions play an important role. The plant growth promotion through the use of microbes, especially endophytes and rhizosphere microbiota, has been proposed as a useful solution. Several studies have shown that humic substances are suitable vehicles for the inoculation of plant growth promoting bacteria, and that this combination has an enhanced effect on the stimulation of plant development. In this work, cucumber plants grown hydroponically have been pre-treated with a sedimentary humic acid (SHA) with known plant growth-enhancing effects, and culturable bacterial endophytes have been isolated from these plants. The hypothesis was that this pre-treatment with SHA could lead to the isolation of certain endophytic taxa whose proliferation within the plant could have been promoted as a result of the effects of the treatment with SHA, and that could eventually reinforce a potential synergistic effect of a combined application of those endophytic bacteria and SHA. The culturable endophytes that have been isolated from humic acid-treated cucumber plants have been identified as members of four main phyla: Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes. Isolates were characterized according to the following plant growth-promoting traits: nitrogen fixation/scavenging, phosphate solubilization, siderophore production and plant hormone production. Most of the isolates were able to fix/scavenge nitrogen and to produce plant hormones (indole-3-acetic acid and several cytokinins), whereas few isolates were able to solubilize phosphate and/or produce siderophores. The most promising endophyte isolates for its use in futures investigations as plant growth-promoting bacterial inocula were Pseudomonas sp. strains (that showed all traits), Sphingomonas sp., Stenotrophomonas sp. strains, or some Arthrobacter sp. and Microbacterium sp. isolates.
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Affiliation(s)
- David De Hita
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Marta Fuentes
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Angel M. Zamarreño
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Yaiza Ruiz
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
| | - Jose M. Garcia-Mina
- Department of Environmental Biology, Biological and Agricultural Chemistry Group (BACh), University of Navarra, Pamplona, Spain
- Centre Mondial de I’lnnovation (CMI) – Groupe Roullier, Saint-Malo, France
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Meidani C, Savvidis A, Lampropoulou E, Sagia A, Katsifas E, Monokrousos N, Hatzinikolaou DG, Karagouni AD, Giannoutsou E, Adamakis IDS, Ntalli NG. Τhe Nematicidal Potential of Bioactive Streptomyces Strains Isolated from Greek Rhizosphere Soils Tested on Arabidopsis Plants of Varying Susceptibility to Meloidogyne spp. PLANTS (BASEL, SWITZERLAND) 2020; 9:E699. [PMID: 32486213 PMCID: PMC7355556 DOI: 10.3390/plants9060699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/17/2020] [Accepted: 05/27/2020] [Indexed: 05/03/2023]
Abstract
A total of 461 indigenous Streptomycetes strains recovered from various Greek rhizosphere habitats were tested for their bioactivity. All isolates were examined for their ability to suppress the growth of 12 specific target microorganisms. Twenty-six were found to exert antimicrobial activity and were screened for potential nematicidal action. S. monomycini ATHUBA 220, S. colombiensis ATHUBA 438, S. colombiensis ATHUBA 431, and S. youssoufensis ATHUBA 546 were proved to have a nematicidal effect and thus were further sequenced. Batch culture supernatants and solvent extracts were assessed for paralysis on Meloidogyne javanica and Meloidogyne incognita second-stage juveniles (J2). The solvent extracts of S. monomycini ATHUBA 220 and S. colombiensis ATHUBA 438 had the highest paralysis rates, so these Streptomycetes strains were further on tested for nematodes' biological cycle arrest on two Arabidopsis thaliana plants; the wild type (Col-0) and the katanin mutant fra2, which is susceptible to M. incognita. Interestingly, S. monomycini ATHUBA 220 and S. colombiensis ATHUBA 438 were able to negatively affect the M. incognita biological cycle in Col-0 and fra2 respectively, and increased growth in Col-0 upon M. incognita infection. However, they were ineffective against M. javanica. Fra2 plants were also proved susceptible to M. javanica infestation, with a reduced growth upon treatments with the Streptomyces strains. The nematicidal action and the plant-growth modulating abilities of the selected Streptomycetes strains are discussed.
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Affiliation(s)
- Christianna Meidani
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Alexandros Savvidis
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Evaggelia Lampropoulou
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Aggeliki Sagia
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Efstathios Katsifas
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Nikolaos Monokrousos
- Department of Science and Technology, International Hellenic University, 57001 Thessaloniki, Greece;
| | - Dimitris G. Hatzinikolaou
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Amalia D. Karagouni
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Eleni Giannoutsou
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Ioannis-Dimosthenis S. Adamakis
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 157 84 Athens, Greece; (C.M.); (A.S.); (E.L.); (A.S.); (E.K.); (D.G.H.); (E.G.); (I.-D.S.A.)
| | - Nikoletta G. Ntalli
- Department of Pesticides Control and Phytopharmacy, Benaki Phytopathological Institute, 14561 Athens, Greece
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Isolation and Characterization of Bacillus spp. Endowed with Multifarious Plant Growth-Promoting Traits and Their Potential Effect on Tomato (Lycopersicon esculentum) Seedlings. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2020. [DOI: 10.1007/s13369-020-04543-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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El-Shatoury SA, Ameen F, Moussa H, Abdul Wahid O, Dewedar A, AlNadhari S. Biocontrol of chocolate spot disease ( Botrytis cinerea) in faba bean using endophytic actinomycetes Streptomyces: a field study to compare application techniques. PeerJ 2020; 8:e8582. [PMID: 32195043 PMCID: PMC7067178 DOI: 10.7717/peerj.8582] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 01/16/2020] [Indexed: 12/14/2022] Open
Abstract
Sustainable agriculture is needing economic applications for disease control. One possibility is offered by local medical plants. Endophytes of medical plants, such as actinomycetes Streptomyces sp. have previously shown antagonistic activities against fungal phytopathogens. In the present field experiment, we aimed to verify the efficiency of endophytic Streptomyces against one of the common pathogens, Botrytis cinerea, causing chocolate spot disease for faba bean (Vicia fabae L.). We tested two strains of Streptomyces (MG788011, MG788012) and three techniques to apply the biocontrol agent: (1) coating the seeds with spores, (2) spraying mycelia and (3) spraying the crude metabolites over the plants. The technique using the crude metabolites was the most efficient to prevent the disease symptoms. Both of the endophytic strains diminished the disease symptoms and improved the plant growth. The study offers a potential biological control technique to prevent chocolate spot disease and, at the same time, increase the yields of faba bean in sustainable agriculture.
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Affiliation(s)
- Sahar A El-Shatoury
- Botany Department, Faculty of Sciences, Suez Canal University, Ismailia, Egypt
| | - Fuad Ameen
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia.,Department of Marine Biology, Al-Hodeidah University, Al-Hodeidah, Yemen
| | - Heba Moussa
- Botany Department, Faculty of Sciences, Suez Canal University, Ismailia, Egypt
| | - Omar Abdul Wahid
- Botany Department, Faculty of Sciences, Suez Canal University, Ismailia, Egypt
| | - Ahmed Dewedar
- Botany Department, Faculty of Sciences, Suez Canal University, Ismailia, Egypt
| | - Saleh AlNadhari
- Department of Plant Protection, College of Agriculture, King Saud University, Riyadh, Saudi Arabia.,Department of Plant Protection, College of Agriculture & Veterinary Medicine Farms, Yemen, Ibb University, Ibb, Yemen
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Ling L, Han X, Li X, Zhang X, Wang H, Zhang L, Cao P, Wu Y, Wang X, Zhao J, Xiang W. A Streptomyces sp. NEAU-HV9: Isolation, Identification, and Potential as a Biocontrol Agent against Ralstonia Solanacearum of Tomato Plants. Microorganisms 2020; 8:microorganisms8030351. [PMID: 32121616 PMCID: PMC7142955 DOI: 10.3390/microorganisms8030351] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/04/2020] [Accepted: 02/12/2020] [Indexed: 11/24/2022] Open
Abstract
Ralstonia solanacearum is an important soil-borne bacterial plant pathogen. In this study, an actinomycete strain named NEAU-HV9 that showed strong antibacterial activity against Ralstonia solanacearum was isolated from soil using an in vitro screening technique. Based on physiological and morphological characteristics and 98.90% of 16S rRNA gene sequence similarity with Streptomyces panaciradicis 1MR-8T, the strain was identified as a member of the genus Streptomyces. Tomato seedling and pot culture experiments showed that after pre-inoculation with the strain NEAU-HV9, the disease occurrence of tomato seedlings was effectively prevented for R.solanacearum. Then, a bioactivity-guided approach was employed to isolate and determine the chemical identity of bioactive constituents with antibacterial activity from strain NEAU-HV9. The structure of the antibacterial metabolite was determined as actinomycin D on the basis of extensive spectroscopic analysis. To our knowledge, this is the first report that actinomycin D has strong antibacterial activity against R. solanacearum with a MIC (minimum inhibitory concentration) of 0.6 mg L−1 (0.48 μmol L−1). The in vivo antibacterial activity experiment showed that actinomycin D possessed significant preventive efficacy against R. solanacearum in tomato seedlings. Thus, strain NEAU-HV9 could be used as BCA (biological control agent) against R. solanacearum, and actinomycin D might be a promising candidate for a new antibacterial agent against R. solanacearum.
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Affiliation(s)
- Ling Ling
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Xiaoyang Han
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Xiao Li
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Xue Zhang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Han Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Lida Zhang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Peng Cao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Yutong Wu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Xiangjing Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
| | - Junwei Zhao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
- Correspondence: (J.Z.); (W.X.)
| | - Wensheng Xiang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China; (L.L.); (X.H.); (X.L.); (X.Z.); (H.W.); (L.Z.); (P.C.); (Y.W.); (X.W.)
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Correspondence: (J.Z.); (W.X.)
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Effects of Stripe Rust Infection on the Levels of Redox Balance and Photosynthetic Capacities in Wheat. Int J Mol Sci 2019; 21:ijms21010268. [PMID: 31906067 PMCID: PMC6981720 DOI: 10.3390/ijms21010268] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/21/2019] [Accepted: 12/23/2019] [Indexed: 01/13/2023] Open
Abstract
Wheat stripe rust (Puccinia striiformis f. sp. tritici, Pst) is the most destructive wheat disease and a major problem for the productivity of wheat in the world. To obtain a better understanding about different effects of redox homeostasis and photosystem (PS) to Pst infection in wheat, we investigated the differences in photosynthesis and the antioxidant defense system in wheat cultivar Chuanmai42 (CM42) in response to two Chinese Pst races known as CYR32 and V26. The results showed that V26-infected wheat accumulated a higher reactive oxygen species (ROS), cell death, and energy dissipation than CYR32-infected wheat when compared with the control. Furthermore, we found that the activities of three antioxidant enzymes (APX, GR, and GPX) and four resistance-related enzymes in CYR32-infected wheat were significantly higher than that in V26-infected wheat. In addition, quantitative RT-PCR indicated that the expression levels of two genes associated with resistant stripe rust in CYR32-infected wheat were clearly higher than that in V26-infected wheat. Compared with CYR32-infected wheat, lower photochemical efficiencies were observed in V26-infected wheat at the adult stage. Meanwhile, only a marked decline in D1 protein was observed in V26-infected wheat. We therefore deduced that wheat with stripe rust resistance could maintain high resistance and photosynthetic capacity by regulating the antioxidant system, disease-resistant related enzymes and genes, and the levels of PSII reaction center proteins.
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Tolba STM, Ibrahim M, Amer EAM, Ahmed DAM. First insights into salt tolerance improvement of Stevia by plant growth-promoting Streptomyces species. Arch Microbiol 2019; 201:1295-1306. [PMID: 31273402 DOI: 10.1007/s00203-019-01696-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/18/2019] [Accepted: 06/26/2019] [Indexed: 11/28/2022]
Abstract
The present study aimed to investigate the potential of plant growth-promoting rhizobacteria (PGPR) to improve the salt stress and alleviate its impact on Stevia crop plant under different levels of salt concentration. Two Streptomyces spp. isolated from the rhizosphere of halophytic plants (Cucumis sativus L. and Salicornia europaea L.) have shown potential for plant growth promotion in Stevia plant. The streptomycetes isolates were identified by classical microbiological techniques and partial sequencing of 16S rRNA gene as Streptomyces variabilis (4NC) and S. fradiae (8PK). The results have shown that inoculation of Stevia plant by these isolates has enhanced plant growth parameters under applied salt stress. Moreover, total cellular proteins were extracted from the two Streptomyces isolates and SDS-PAGE technique was conducted. Mass spectrometric analysis has identified unique polypeptide of the elongation factor thermos unstable (EF-Tu) indicating the elevation of ribosomal RNA and ribosomal protein genes transcription. On the same context, alleviation of salt stress in Stevia plants inoculated with the two Streptomyces isolates has potentially promoted the accumulation of the major pronounced RuBisCO large subunit protein band detected approximately at 53 kDa. These results may give novel insights and accretion our understanding of salinity tolerance mechanisms using PGP streptomycetes to develop resistant sugar crops of highly important economic value. This study has presented the integration of microbiological, biochemical, and molecular techniques to evaluate the effect of salt stress and to assess the level of stress amelioration using PGPR on proteostasis of sugar crops in Egypt.
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Affiliation(s)
- Sahar T M Tolba
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
| | - Mohamed Ibrahim
- Botany Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Essam A M Amer
- Breeding and Genetics Department, Sugar Crops Research Institute, Agricultural Research Centre (ARC), Giza, Egypt
| | - Doaa A M Ahmed
- Breeding and Genetics Department, Sugar Crops Research Institute, Agricultural Research Centre (ARC), Giza, Egypt
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Passari AK, Upadhyaya K, Singh G, Abdel-Azeem AM, Thankappan S, Uthandi S, Hashem A, Abd_Allah EF, Malik JA, AS A, Gupta VK, Ranjan S, Singh BP. Enhancement of disease resistance, growth potential, and photosynthesis in tomato (Solanum lycopersicum) by inoculation with an endophytic actinobacterium, Streptomyces thermocarboxydus strain BPSAC147. PLoS One 2019; 14:e0219014. [PMID: 31269087 PMCID: PMC6608948 DOI: 10.1371/journal.pone.0219014] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 06/13/2019] [Indexed: 12/13/2022] Open
Abstract
Biotic stresses in plants have a significant impact on agricultural productivity. In the present study, in vivo experiments were conducted to determine the physiological responses of tomato (Solanum lycopersicum L.) seedlings by inoculation with an endophytic actinobacterium, Streptomyces thermocarboxydus isolate BPSAC147 under greenhouse conditions. Further, photochemical quantum yield of photosystem II (PSII) (Fv/Fm), photochemical quenching (qP) and non-photochemical (NPQ) were calculated in seedlings inoculated with S. thermocarboxydus (T1) and were compared with control (T0) plants. Furthermore, the electron transport rate (ETR) of PSII exhibited a significant increase in T1 plants, relative to T0 plants. These results indicate that inoculation of tomato seedlings with S. thermocarboxydus had a positive effect on the process of photosynthesis, resulting in enhanced chlorophyll fluorescence parameters due to increased ETR in the thylakoid membrane. GC-MS analysis showed significant differences in the volatile compounds in the different treatments performed under greenhouse conditions. The present study suggests that S. thermocarboxydus can be used as new biocontrol agent to control Fusarium wilt in tomato crops and enhance productivity by enhancing photosynthesis.
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Affiliation(s)
- Ajit Kumar Passari
- Department of Biotechnology, Mizoram University, Aizawl, Mizoram, India
- Departamento de Biologia Molecular y Biotecnologia, Instituto de Investigaciones Biomedicas, Universidad Nacional Autonoma de Mexico (UNAM), Mexico, Mexico
| | | | - Garima Singh
- Department of Biotechnology, Mizoram University, Aizawl, Mizoram, India
| | | | - Sugitha Thankappan
- Biocatalysts Lab, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Sivakumar Uthandi
- Biocatalysts Lab, Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
- Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza, Egypt
| | - Elsayed Fathi Abd_Allah
- Department of Chemistry and Biotechnology, ERA Chair of Green Chemistry, Tallinn University of Technology, Tallinn, Estonia
| | - Jahangir Ahmed Malik
- Department of Chemistry and Biotechnology, ERA Chair of Green Chemistry, Tallinn University of Technology, Tallinn, Estonia
| | - Alqarawi AS
- Department of Chemistry and Biotechnology, ERA Chair of Green Chemistry, Tallinn University of Technology, Tallinn, Estonia
| | - Vijai Kumar Gupta
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Sanjay Ranjan
- Application Scientist, Spectraritec, Ranjit Nagar Commercial Complex, Saadipur, Delhi
| | - Bhim Pratap Singh
- Department of Biotechnology, Mizoram University, Aizawl, Mizoram, India
- * E-mail:
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Plant Biostimulants: Importance of the Quality and Yield of Horticultural Crops and the Improvement of Plant Tolerance to Abiotic Stress—A Review. AGRONOMY-BASEL 2019. [DOI: 10.3390/agronomy9060335] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Biostimulants are among the natural preparations that improve the general health, vitality, and growth of plants and protect them against infections. They can be successfully used in both agri- and horticultural crops. The main active substances used in such preparations are humic and fulvic acids, protein hydrolysates, compounds containing nitrogen, seaweed extracts, beneficial fungi, and bacteria. Biostimulant formulations may be single- or multi-component, but the synergic action of several different components has been observed. Many groups of biostimulants have been distinguished through their method of application (soil, foliar), the material from which they were produced (plant, animal), or the process by which they were created (hydrolysis, fermentation, extraction). Natural soil stimulants can induce the development of beneficial soil organisms that provide substrates for plant growth. The use of natural preparations that are not harmful to the environment is particularly important in connection with the progressive processes of soil degradation and atmospheric pollution. This review gives an overview of the importance and influence of different natural plant biostimulants on both the yield and quality of crops.
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50
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Zappelini C, Alvarez-Lopez V, Capelli N, Guyeux C, Chalot M. Streptomyces Dominate the Soil Under Betula Trees That Have Naturally Colonized a Red Gypsum Landfill. Front Microbiol 2018; 9:1772. [PMID: 30123206 PMCID: PMC6085467 DOI: 10.3389/fmicb.2018.01772] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/16/2018] [Indexed: 11/13/2022] Open
Abstract
The successful restoration of well-engineered tailings storage facilities is needed to avoid mine tailings problems. This study characterized the bacterial communities from vegetated and non-vegetated soils from a red gypsum landfill resulting from the industrial extraction of titanium. A set of 275 bacteria was isolated from vegetated soil and non-vegetated soil areas and taxonomically characterized using BOX-PCR. The study also evaluated the ability of a subset of 88 isolated bacteria on their ability to produce plant growth promoting (PGP) traits [indoleacetic acid (IAA) production, phosphate solubilization, and siderophore production] and their tolerance to potentially toxic elements (PTEs). Twenty strains were chosen for further analysis to produce inoculum for birch-challenging experiments. Principal component analysis (PCA) showed that the set of pedological parameters (pH, granulometry, carbon, organic matter, and Mg content) alone explained approximately 40% of the differences between the two soils. The highest density of total culturable bacteria was found in the vegetated soil, and it was much higher than that in the non-vegetated soil. The Actinobacteria phyla dominated the culturable soil community (70% in vegetated soil and 95% in non-vegetated soil), while the phyla Firmicutes (including the genus Bacillus) and Bacteroides (including the genera Pedobacter and Olivibacter) were found only in the vegetated soil fraction. Additional genera (Rhizobium, Variovorax, and Ensifer) were found solely in the vegetated soil. The vegetated soil bacteria harbored the most beneficial PGP bacteria with 12% of the isolates showing three or more PGP traits. The strains with higher metal tolerances in our study were Phyllobacterium sp. WR140 (RO1.15), Phyllobacterium sp. WR140 (R01.34), and Streptomyces sp. (R04.15), all isolated from the vegetated soil. Among the isolates tested in challenging experiments, Phyllobacterium (R01.34) and Streptomyces sp. (R05.33) have the greatest potential to act as PGP rhizobacteria and therefore to be used in the biological restoration of tailings dumps.
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Affiliation(s)
- Cyril Zappelini
- Laboratoire Chrono-Environnement, UMR CNRS 6249, Université Bourgogne Franche-Comté, Montbéliard, France
| | - Vanessa Alvarez-Lopez
- Laboratoire Chrono-Environnement, UMR CNRS 6249, Université Bourgogne Franche-Comté, Montbéliard, France
| | - Nicolas Capelli
- Laboratoire Chrono-Environnement, UMR CNRS 6249, Université Bourgogne Franche-Comté, Montbéliard, France
| | - Christophe Guyeux
- Département d'Informatique des Systèmes Complexes, Institut FEMTO-ST (UMR 6174 CNRS), Université Bourgogne Franche-Comté, Besançon, France
| | - Michel Chalot
- Laboratoire Chrono-Environnement, UMR CNRS 6249, Université Bourgogne Franche-Comté, Montbéliard, France.,Faculté des Sciences et Technologies, Université de Lorraine, Nancy, France
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