Article
Plant Sciences
Santosh Kumar Jana, Md Majharul Islam, Samrat Hore, Sukhendu Mandal
Summary: Research on seed microbiota is important for plant growth and productivity. This study identified and characterized unique culturable seed endophytes in rice and demonstrated their roles in promoting plant growth and biocontrol.
PLANT GROWTH REGULATION
(2023)
Article
Agronomy
Er-Fu Yang, Samantha C. Karunarathna, Saowaluck Tibpromma, Steven L. Stephenson, Itthayakorn Promputtha, Abdallah M. Elgorban, Salim Al-Rejaie, Putarak Chomnunti
Summary: In this study, 34 different fungal endophytic strains were isolated from healthy mango leaves in Yunnan Province. The dominant fungal endophytes were from the genus Chaetomium. Co-cultivation assays showed that certain strains of Chaetomium sp. exhibited strong inhibition against bacterial pathogens and various other fungal strains showed moderate to strong antagonistic effects against fungal pathogens.
Article
Microbiology
Olga A. Lastovetsky, Tancredi Caruso, Fiona P. Brennan, David P. Wall, Sean McMahon, Evelyn Doyle
Summary: This study provides empirical evidence of a selective and bi-directional relationship between AMF and bacterial communities co-inhabiting plant roots, explaining up to 36% of each other's variance. These findings contribute to a better understanding of the interaction between AMF and bacterial communities in plant root systems.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Microbiology
Christos A. Christakis, Georgia Daskalogiannis, Anastasia Chatzaki, Emmanouil A. Markakis, Glykeria Mermigka, Angeliki Sagia, Giulio Flavio Rizzo, Vittoria Catara, Ilias Lagkouvardos, David J. Studholme, Panagiotis F. Sarris
Summary: This study investigated the potential of halophytic endophytes from crop wild relatives to improve crop adaptations to various stresses, including salinity tolerance, growth promotion, and phytopathogen antagonistic activities. The researchers identified 115 endophytic isolates, three of which showed in-planta suppression of the phytopathogen Verticillium growth. Genomes of selected isolates were sequenced and three novel species were identified, suggesting the potential use of these endophytes as bio-inoculants for enhancing crop growth and stress tolerance, particularly in high-salinity conditions.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Microbiology
Qiao Liu, Ludan Li, Yujie Chen, Sai Wang, Lina Xue, Weiying Meng, Jihong Jiang, Xiaoying Cao
Summary: This study used high-throughput sequencing to explore the diversity of endophytic microbes in the roots, stems, and leaves of Taxus yunnanensis. The analysis identified dominant genera of endophytic bacteria, such as Pseudomonas and Acidovorax, as well as prominent endophytic fungi genera, such as Cladosporium and Fusarium. Several promising strains of endophytic bacteria were selected for their growth-promoting capabilities, and their fermentation broth significantly increased taxanes accumulation in Taxus stem cells. These findings offer new insights into the industrial production of taxol and the conservation of Taxus resources.
Article
Plant Sciences
Tori Langill, Malgorzata Wojcik, Jaco Vangronsveld, Sofie Thijs
Summary: This study investigated the effects of seed endophytes of Noccaea caerulescens on different plants and found that inoculation with a bacterial consortium could increase plant size and germination rate. N. caerulescens showed the best response to inoculation.
Article
Multidisciplinary Sciences
Davide Francioli, Geeisy Cid, Mohammad-Reza Hajirezaei, Steffen Kolb
Summary: Leaf microbiota plays a crucial role in plant fitness and ecosystem functions. The composition of leaf microbiota is mainly determined by plant phenology and harsh environmental conditions. However, the impact of climate change on leaf microbiota remains unresolved, resulting in limited understanding of how environmental stresses associated with climate change affect the composition and functions of leaf microbes.
SCIENTIFIC REPORTS
(2022)
Article
Microbiology
Chenglong Ji, Meilin Zhang, Zirong Kong, Xue Chen, Xing Wang, Wei Ding, Hangxian Lai, Qiao Guo
Summary: In this study, Bacillus amyloliquefaciens Ba13 was found to significantly promote the growth of tomato plants and exhibit antagonistic activity against a variety of plant pathogens. The genome of strain Ba13 encodes various antibiotics and volatile compounds, as well as the ability to synthesize plant hormones through different pathways. These findings suggest that Ba13 has the potential to be used as a microbial agent for promoting plant growth and controlling plant diseases.
MICROBIOLOGY SPECTRUM
(2021)
Editorial Material
Plant Sciences
Daniel A. Bastias, Ernesto Gianoli, Pedro E. Gundel
Summary: The association of plants with Epichloe fungal endophytes may eliminate the trade-off between growth and defence functions in plants by stimulating plant growth hormones and producing antiherbivore alkaloids. Research supports that enhanced plant resistance promoted by endophytes does not compromise plant growth, discussing the ecological benefits of this lack of trade-off.
Article
Plant Sciences
Mailen Hirsch, Pablo Luis Burges, Lara Migueliz, Natalia Marina Villarreal, Maria Marina
Summary: The study aimed to isolate and characterize strawberry bacteria that can protect plants from fungal pathogens and promote plant growth. A total of 103 bacterial isolates (57 epiphytes and 46 endophytes) were obtained from strawberry leaves and harvest-ripe fruits, and extensively characterized biochemically and molecularly. Among them, 47 isolates showed significant inhibition of the in vitro growth of Botrytis cinerea through diffusible compounds, nutrient or space competition, and the synthesis of volatile organic compounds. Eight epiphytes and four endophytes were selected for their ability to produce enzymes and form biofilms. These bacteria also produced plant hormones and significantly increased the fresh weight of Arabidopsis thaliana roots and rosettes. The findings suggest the potential of these isolates as biological controllers and growth promoters in crops like strawberries.
PLANT GROWTH REGULATION
(2023)
Review
Food Science & Technology
Roberta Mendes dos Santos, Nicolas Desoignies, Everlon Cid Rigobelo
Summary: Sustainable agriculture can benefit from the use of bacterial endophytes as alternatives to synthetic fertilizers and pesticides. Bacterial endophytes have the potential to promote plant growth, enhance defense against pathogens, and mitigate abiotic stress. However, research on bacterial endophytes in agriculture is currently limited, highlighting the need for further exploration and practical application.
FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
(2022)
Article
Plant Sciences
Mohamed Idbella, Giuliano Bonanomi, Francesca De Filippis, Ghita Amor, Fatima Ezzahra Chouyia, Taoufiq Fechtali, Stefano Mazzoleni
Summary: Seed endophytes and AMF together influence plant behavior significantly, playing a crucial role in plant-soil feedback. Seed fungal endophytes generate conspecific negative feedback, while seed bacterial endophytes shift feedback from negative to positive. The simultaneous occurrence of seed endophytes and AMF may either generate or expand negative plant-soil feedback effects.
Article
Ecology
Loan Edel Villalobos-Flores, Samuel David Espinosa-Torres, Fernando Hernandez-Quiroz, Alberto Pina-Escobedo, Yair Cruz-Narvaez, Francisco Velazquez-Escobar, Roderich Suessmuth, Jaime Garcia-Mena
Summary: By using high-throughput DNA sequencing, the study characterized the bacterial and fungal communities associated with Bouvardia ternifolia in different plant parts and the rhizosphere. The study identified differential abundance and functional pathways in the endophytic microorganisms, which contribute to the production of therapeutic metabolites in the medicinal plant. This research provides valuable insights into the diverse microbial communities and their roles in the production of therapeutic compounds.
Article
Forestry
Beiyan Deng, Ling Wu, Hongju Xiao, Qiang Cheng
Summary: In this study, an endophytic bacterium En3 was isolated from the leaf endosphere of Populus tomentosa and shown to have significant growth-promoting effects on both poplar and tomato seedlings. En3 exhibited phosphorus solubilization and nitrogen fixation abilities, and it produced indole-3-acetic acid (IAA). The genome analysis of En3 revealed the presence of genes associated with nitrogen fixation, phosphate solubilization, sulfur metabolism, and the synthesis of IAA, suggesting its potential as a biofertilizer for crop and tree cultivation.
Article
Plant Sciences
Shikha Gupta, Sangeeta Pandey, Satyawati Sharma
Summary: The present study demonstrates that two bacterial endophytes, Pseudomonas aeruginosa OS_12 and Aneurinibacillus aneurinilyticus OS_25, isolated from leaves of Ocimum sanctum Linn., promote plant growth and induce systemic resistance in pea plants against Fusarium oxysporum f.sp. pisi. These endophytes also showed antagonistic activity and produced various beneficial substances for plant growth. The pot trials revealed that pea plants treated with these endophytes had a lower infection rate of Fusarium root rot disease and improved growth parameters. The endophytes enhanced the activities of defense-related enzymes and reduced oxidative stress in the host plants.
FRONTIERS IN PLANT SCIENCE
(2022)
Review
Multidisciplinary Sciences
Gustavo Santoyo
Summary: This review examines the mechanisms used by plants to selectively recruit beneficial microbiomes and exclude potential pathogens. It discusses the role of root exudates, molecular recognition, and signaling in attracting beneficial microbiota and maintaining plant-microbiome homeostasis. The review also explores the environmental and biotic factors that influence microbial community dynamics and the interactions between different microbial species.
JOURNAL OF ADVANCED RESEARCH
(2022)
Article
Plant Sciences
Sajjad Hyder, Zarrin Fatima Rizvi, Sergio de los Santos-Villalobos, Gustavo Santoyo, AmjadShahzad Gondal, Noreen Khalid, Syeda Noureen Fatima, Mashal Nadeem, Khizra Rafique, Akasha Rani
Summary: Sustainable agriculture relies on the use of bioinoculants, such as plant growth-promoting rhizobacteria (PGPR), to control pests and improve productivity. This alternative solution helps reduce the toxic effects of synthetic pesticides and fertilizers on human health and the environment. This review explores the direct mechanisms of PGPR, including biological nitrogen fixation, element solubilization, and the production of siderophores and phytohormones. It also discusses the indirect mechanisms, such as antagonism against phytopathogens, and the application of PGPR under different abiotic stress conditions and the use of commercial bioinoculants. The study emphasizes the importance of applying PGPR as a sustainable and green alternative to enhance crop production and resilience.
JOURNAL OF PLANT NUTRITION
(2023)
Article
Plant Sciences
Isaac A. Salmeron-Santiago, Miguel Martinez-Trujillo, Juan J. Valdez-Alarcon, Martha E. Pedraza-Santos, Gustavo Santoyo, Pedro A. Lopez, John Larsen, Maria J. Pozo, Ana T. Chavez-Barcenas
Summary: The exchange of P and C between plants and AMF is crucial for their mutualistic symbiosis. Tomato plants inoculated with R. irregularis showed increased growth response under Low P, but similar response to non-inoculated plants under High P. AMF colonization was reduced under High P, but accumulation of AMF biomass and spores was higher under Low P. Our results suggest that P-limiting conditions can stimulate plant growth through increased source and sink strength, which is influenced by AMF performance.
PHYSIOLOGIA PLANTARUM
(2023)
Review
Plant Sciences
Paulina Guzman-Guzman, Ajay Kumar, Sergio de los Santos-Villalobos, Fannie I. Parra-Cota, Ma. del Carmen Orozco-Mosqueda, Ayomide Emmanuel Fadiji, Sajjad Hyder, Olubukola Oluranti Babalola, Gustavo Santoyo
Summary: Biocontrol agents (BCA) such as fungi from the genus Trichoderma are increasingly being used in agriculture to prevent crop losses and enhance plant food production in a sustainable and environmentally friendly manner. Trichoderma species possess various biocontrol traits, making them versatile in controlling plant pathogens, nematodes, and pests. They can be used alone or in combination with other beneficial microbes as part of bioformulations. This review highlights the biocontrol traits of six commonly used Trichoderma species and their importance as alternatives to chemical pesticides and fertilizers.
Review
Plant Sciences
Ma. Del Carmen Orozco-Mosqueda, Ajay Kumar, Ayomide Emmanuel Fadiji, Olubukola Oluranti Babalola, Gerardo Puopolo, Gustavo Santoyo
Summary: Botrytis cinerea is a major plant pathogen causing grey mould disease and significant damage to fruits and vegetables. Plant-beneficial bacteria, such as plant growth-promoting bacteria (PGPB), have shown potential as a biocontrol strategy to replace conventional botrycides. This review summarizes the different stages of B. cinerea infection in plants and the mechanisms of biocontrol exerted by PGPB, including antibiosis, space occupation, nutrient uptake, ethylene modulation, and induction of plant defense mechanisms.
Article
Microbiology
Daniel Rojas-Solis, Miguel Angel Vences-Guzman, Christian Sohlenkamp, Gustavo Santoyo
Summary: Membrane cardiolipin (CL) phospholipids play a fundamental role in bacterial adaptation to different environmental conditions, including saline stress. In this study, deletion mutants of two CL synthetase genes in the rhizobacterium Pseudomonas fluorescens UM270 were constructed and their role in plant growth promotion under salt stress was evaluated. The results showed that CL synthesis in P. fluorescens UM270 plays an important role in promoting tomato plant growth, especially under salt-stress conditions.
MICROBIOLOGICAL RESEARCH
(2023)
Article
Agronomy
Oghoye P. P. Oyedoh, Wei Yang, Dharumadurai Dhanasekaran, Gustavo Santoyo, Bernard R. R. Glick, Olubukola O. O. Babalola
Summary: The failure of sustainable and agricultural intensifications in saving the ecosystem/public health has led to the exploration of microbiome resource engineering for sustainable approaches. Sustainable agricultural practices through microbiome resource services have shown significant role in plant health and disease management. The untapped potential of Actinomycetes, a rare bacterial group, in producing novel useful metabolites for phytoprotection has become the focus of research.
Editorial Material
Microbiology
Ajay Kumar, Gustavo Santoyo, James F. White, Virendra Kumar Mishra
Article
Microbiology
Kallinkal Sobha Sruthy, Livleen Shukla, Aditi Kundu, Sandeep Kumar Singh, Hissah Abdulrahman Alodaini, Ashraf Atef Hatamleh, Gustavo Santoyo, Ajay Kumar
Summary: Microbial degradation is an effective method for managing rice residue, and a fungal consortium constructed with highly sporulating ascomycetes fungi can efficiently degrade rice stubble and release lignin degradation products. The maximum degradation is achieved when the consortium is applied at a volume of 15% by weight of rice stubble.
Article
Plant Sciences
Ma. del Carmen Orozco-Mosqueda, Ayomide Emmanuel Fadiji, Olubukola Oluranti Babalola, Gustavo Santoyo
Summary: A wide range of root-associated bacteria can sensitize plant defenses against pathogen infections by producing diverse molecules that induce systemic resistance in plants. These molecules include quorum sensing molecules, lipids, oligosaccharides, proteins, iron-chelating molecules, and volatiles. This review explores the concepts and differences between ISR and other plant immune responses, emphasizing the importance of understanding plant responses to such a range of chemical diversity. The urgency of utilizing these elicitors to develop more sustainable agriculture by aiding plant crops in defending themselves against invading pathogens is also discussed.
Article
Microbiology
Priya Yadav, Rahul Prasad Singh, Abeer Hashem, Elsayed Fathi Abd Allah, Gustavo Santoyo, Ajay Kumar, Rajan Kumar Gupta
Summary: There is a growing interest in utilizing cyanobacteria for land rehabilitation. This study evaluated the ability of different cyanobacteria and their consortia to form biocrusts on different substrates, and found that the consortium exhibited better results. The study also showed that cyanobacteria can persist in soil environments and have positive impacts on soil fertility and plant growth.
Review
Plant Sciences
Ma. del Carmen Orozco-Mosqueda, Ajay Kumar, Olubukola Oluranti Babalola, Gustavo Santoyo
Summary: This review analyzes rhizobiome transplantation as an ecological alternative for increasing plant protection and crop production. It compares the differences between single-strain/species inoculation and dual or consortium application and evaluates the feasibility of transplanting other associated micro-communities. The study concludes that rhizobiome transplantation is an attractive alternative, but there are challenges to its application in large-scale agriculture.
Article
Biotechnology & Applied Microbiology
Salvador Chavez-Avila, Maria F. Valencia-Marin, Paulina Guzman-Guzman, Ajay Kumar, Olubukola Oluranti Babalola, Ma del Carmen Orozco-Mosqueda, Sergio de los Santos-Villalobos, Gustavo Santoyo
Summary: In the field of agriculture, it is important to search for novel stress-resistant microbial agents with plant-beneficial activities. This study identified a stress-tolerant bacterium called UMAF16, which belongs to the Streptomyces species. UMAF16 possesses an excellent arsenal of stress tolerant genes and antimicrobial properties, as well as plant growth-promoting mechanisms.
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
(2023)
Article
Plant Sciences
Yesenia Cortes-Solis, Violeta Tovar-Rocha, Julio Cesar Tovar-Rocha, Gustavo Santoyo, Maria del Carmen Rocha-Granados
Summary: The production and consumption of blueberry have increased in Mexico due to its health benefits. This study aimed to evaluate the effects of Pseudomonas fluorescens strains and slow-release fertilizers on the development of blueberry plants. The results showed that the inoculated plants had better growth and the nitrophosphate fertilizer had more positive effects compared to basacote or the control treatment. This study could contribute to the sustainable propagation of blueberry plants.
ACTA BIOLOGICA COLOMBIANA
(2023)
Article
Plant Sciences
Ma. del Carmen Orozco-Mosqueda, Gustavo Santoyo, Bernard R. Glick
Summary: Phytohormones are important regulators of plant growth and development, and also produced by plant growth-promoting bacteria. These bacterial phytohormones can modulate plant physiology and genetics, and have beneficial effects on plant growth. This review highlights the recent advances in understanding the functions and potential applications of bacterial phytohormones in agriculture.
