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Wang Y, Xiao B, Wang W, Kidron GJ. Interactions between biocrusts and herbaceous communities are divergent in dry and wet semiarid ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 941:173759. [PMID: 38844240 DOI: 10.1016/j.scitotenv.2024.173759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 05/30/2024] [Accepted: 06/02/2024] [Indexed: 06/10/2024]
Abstract
Biocrusts are a prevalent form of living cover in worldwide drylands, and their presence are intimately associated with herbaceous community, forming a spatially mosaic distribution pattern in dryland ecosystems. The role of biocrusts as modulators of herbaceous community assembly is extensively studied, whereas, less is known whether their interactions are permanent or changeable with various environmental conditions. This study conducted a field survey of herbaceous community accompanied by three types of biocrusts (cyanobacterial, cyanobacterial-moss mixed, and moss crusts) in two contrasting (dry and wet) semiarid climate regions in the Chinese Loess Plateau, to explore whether or not climatic aridity gradient affects the interactions between biocrusts and herbaceous community. Our results showed that in dry semiarid climate, the biomass, species richness, and diversity of herbaceous community from biocrust plots were 89 %, 179 %, and 52 % higher than that from the uncrusted plots, respectively, while in wet semiarid climate, those herbaceous community indices from biocrust plots were 68 %, 43 %, and 23 % lower than that from the uncrusted plots, respectively. The impacts of biocrusts on herbaceous community were highly dependent on the types and coverage of biocrusts. Regardless of aridity gradient, the richness and diversity of herbaceous community were the lowest in the moss-covered plots, followed by the cyanobacteria-covered plots and the plots with a mixed cyanobacteria and moss population. Along with increasing biocrust coverage, the species richness and diversity of herbaceous plants initially increased and then decreased in dry semiarid climate, while in wet semiarid climate they decreased linearly with biocrust coverage. Structural equation modeling revealed that the factors of biocrust types and coverage affected herbaceous community indirectly through soil properties in dry semiarid climate, whereas in wet semiarid climate they directly affected herbaceous community through biotic interactions. Together, our findings indicated that cyanobacterial and moss biocrusts facilitate the development of herbaceous community in dry semiarid climate by increasing soil stability and nutrient levels, but in wet semiarid climate they restrict herbaceous plant growth through competing niche space. These results highlight the divergent relationships between biocrusts and herbaceous community across aridity gradient in dryland ecosystems, and this knowledge may be critically important in light of the projected global climate change which is going to change the aridity of global drylands.
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Affiliation(s)
- Yanfeng Wang
- Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bo Xiao
- Key Laboratory of Arable Land Conservation in North China, Ministry of Agriculture and Rural Affairs, College of Land Science and Technology, China Agricultural University, Beijing 100193, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Wanfu Wang
- Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Giora J Kidron
- Institute of Earth Sciences, The Hebrew University of Jerusalem, Givat Ram Campus, Jerusalem 91904, Israel
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Srivastava S, Tyagi R, Sharma S. Seed biopriming as a promising approach for stress tolerance and enhancement of crop productivity: a review. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:1244-1257. [PMID: 37824780 DOI: 10.1002/jsfa.13048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/04/2023] [Accepted: 10/13/2023] [Indexed: 10/14/2023]
Abstract
Chemicals are used extensively in agriculture to increase crop production to meet the nutritional needs of an expanding world population. However, their injudicious application adversely affects the soil's physical, chemical and biological properties, subsequently posing a substantial threat to human health and global food security. Beneficial microorganisms improve plant health and productivity with minimal impact on the environment; however, their efficacy greatly relies on the application technique. Biopriming is an advantageous technique that involves the treatment of seeds with beneficial biological agents. It exhibits immense potential in improving the physiological functioning of seeds, thereby playing a pivotal role in their uniform germination and vigor. Biopriming-mediated molecular and metabolic reprogramming imparts stress tolerance to plants, improves plant health, and enhances crop productivity. Furthermore, it is also associated with rehabilitating degraded land, and improving soil fertility, health and nutrient cycling. Although biopriming has vast applications in the agricultural system, its commercialization and utilization by farmers is still in its infancy. This review aims to critically analyze the recent studies based on biopriming-mediated stress mitigation by alteration in physiological, metabolic and molecular processes in plants. Additionally, considering the necessity of popularizing this technique, the major challenges and prospects linked to the commercialization and utilization of this technique in agricultural systems have also been discussed. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Sonal Srivastava
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
| | - Rashi Tyagi
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
| | - Shilpi Sharma
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
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Robinson JM, Hodgson R, Krauss SL, Liddicoat C, Malik AA, Martin BC, Mohr JJ, Moreno-Mateos D, Muñoz-Rojas M, Peddle SD, Breed MF. Opportunities and challenges for microbiomics in ecosystem restoration. Trends Ecol Evol 2023; 38:1189-1202. [PMID: 37648570 DOI: 10.1016/j.tree.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 07/21/2023] [Accepted: 07/31/2023] [Indexed: 09/01/2023]
Abstract
Microbiomics is the science of characterizing microbial community structure, function, and dynamics. It has great potential to advance our understanding of plant-soil-microbe processes and interaction networks which can be applied to improve ecosystem restoration. However, microbiomics may be perceived as complex and the technology is not accessible to all. The opportunities of microbiomics in restoration ecology are considerable, but so are the practical challenges. Applying microbiomics in restoration must move beyond compositional assessments to incorporate tools to study the complexity of ecosystem recovery. Advances in metaomic tools provide unprecedented possibilities to aid restoration interventions. Moreover, complementary non-omic applications, such as microbial inoculants and biopriming, have the potential to improve restoration objectives by enhancing the establishment and health of vegetation communities.
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Affiliation(s)
- Jake M Robinson
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia; The Aerobiome Innovation & Research Hub, Flinders University, Bedford Park, SA 5042, Australia.
| | - Riley Hodgson
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia
| | - Siegfried L Krauss
- Kings Park Science, Department of Biodiversity, Conservation, and Attractions, Fraser Avenue, Kings Park, WA 6005, Australia; Environmental and Conservation Sciences, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia; Biological Sciences, University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
| | - Craig Liddicoat
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia; School of Public Health, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Ashish A Malik
- School of Biological Sciences, University of Aberdeen, Aberdeen AB24 3UU, UK
| | - Belinda C Martin
- School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia; Ooid Scientific, North Lake, WA 6162, Australia
| | - Jakki J Mohr
- College of Business, University of Montana, Missoula, MT, USA
| | - David Moreno-Mateos
- School of Geography and the Environment, University of Oxford, South Parks Road. Oxford OX1 3QY, UK; Department of Landscape Architecture, Graduate School of Design, Harvard University, Quincy Street. Cambridge, MA 02138, USA; Basque Center for Climate Change - BC3, Ikerbasque Foundation for Science. Edificio Sede 1, Parque Cientifico UPV, 04940 Leioa, Spain
| | - Miriam Muñoz-Rojas
- Departamento de Biologia Vegetal y Ecologia. Universidad de Sevilla, 41004 Sevilla, Spain; Centre for Ecosystem Science, School of Biological, Earth, and Environmental Sciences, University of New South Wales (UNSW) Sydney, Sydney, NSW 2052, Australia
| | - Shawn D Peddle
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia
| | - Martin F Breed
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia
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Yadav P, Singh RP, Alodaini HA, Hatamleh AA, Santoyo G, Kumar A, Gupta RK. Impact of dehydration on the physiochemical properties of Nostoc calcicola BOT1 and its untargeted metabolic profiling through UHPLC-HRMS. FRONTIERS IN PLANT SCIENCE 2023; 14:1147390. [PMID: 37426961 PMCID: PMC10327440 DOI: 10.3389/fpls.2023.1147390] [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: 01/18/2023] [Accepted: 05/24/2023] [Indexed: 07/11/2023]
Abstract
The global population growth has led to a higher demand for food production, necessitating improvements in agricultural productivity. However, abiotic and biotic stresses pose significant challenges, reducing crop yields and impacting economic and social welfare. Drought, in particular, severely constrains agriculture, resulting in unproductive soil, reduced farmland, and jeopardized food security. Recently, the role of cyanobacteria from soil biocrusts in rehabilitating degraded land has gained attention due to their ability to enhance soil fertility and prevent erosion. The present study focused on Nostoc calcicola BOT1, an aquatic, diazotrophic cyanobacterial strain collected from an agricultural field at Banaras Hindu University, Varanasi, India. The aim was to investigate the effects of different dehydration treatments, specifically air drying (AD) and desiccator drying (DD) at various time intervals, on the physicochemical properties of N. calcicola BOT1. The impact of dehydration was assessed by analyzing the photosynthetic efficiency, pigments, biomolecules (carbohydrates, lipids, proteins, osmoprotectants), stress biomarkers, and non-enzymatic antioxidants. Furthermore, an analysis of the metabolic profiles of 96-hour DD and control mats was conducted using UHPLC-HRMS. Notably, there was a significant decrease in amino acid levels, while phenolic content, fatty acids, and lipids increased. These changes in metabolic activity during dehydration highlighted the presence of metabolite pools that contribute to the physiological and biochemical adjustments of N. calcicola BOT1, mitigating the impact of dehydration to some extent. Overall, present study demonstrated the accumulation of biochemical and non-enzymatic antioxidants in dehydrated mats, which could be utilized to stabilize unfavorable environmental conditions. Additionally, the strain N. calcicola BOT1 holds promise as a biofertilizer for semi-arid regions.
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Affiliation(s)
- Priya Yadav
- Laboratory of Algal Research, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Rahul Prasad Singh
- Laboratory of Algal Research, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | | | - Ashraf Atef Hatamleh
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Gustavo Santoyo
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Ajay Kumar
- Laboratory of Algal Research, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Rajan Kumar Gupta
- Laboratory of Algal Research, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
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Mechanisms of Stress Tolerance in Cyanobacteria under Extreme Conditions. STRESSES 2022. [DOI: 10.3390/stresses2040036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cyanobacteria are oxygen-evolving photoautotrophs with worldwide distribution in every possible habitat, and they account for half of the global primary productivity. Because of their ability to thrive in a hostile environment, cyanobacteria are categorized as “extremophiles”. They have evolved a fascinating repository of distinct secondary metabolites and biomolecules to promote their development and survival in various habitats, including severe conditions. However, developing new proteins/enzymes and metabolites is mostly directed by an appropriate gene regulation system that results in stress adaptations. However, only few proteins have been characterized to date that have the potential to improve resistance against abiotic stresses. As a result, studying environmental stress responses to post-genomic analysis, such as proteome changes using latest structural proteomics and synthetic biology techniques, is critical. In this regard, scientists working on these topics will benefit greatly from the stress of proteomics research. Progress in these disciplines will aid in understanding cyanobacteria’s physiology, biochemical, and metabolic systems. This review summarizes the most recent key findings of cyanobacterial proteome study under various abiotic stresses and the application of secondary metabolites formed during different abiotic conditions.
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Dadzie FA, Moles AT, Erickson TE, Slavich E, Muñoz‐Rojas M. Native bacteria and cyanobacteria can influence seedling emergence and growth of native plants used in dryland restoration. J Appl Ecol 2022. [DOI: 10.1111/1365-2664.14293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Frederick A. Dadzie
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences UNSW Sydney Sydney New South Wales Australia
- Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Sciences UNSW Sydney Sydney New South Wales Australia
| | - Angela T. Moles
- Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Sciences UNSW Sydney Sydney New South Wales Australia
| | - Todd E. Erickson
- School of Biological Sciences University of Western Australia Crawley Western Australia Australia
- Kings Park Science, Department of Biodiversity, Conservation and Attractions Kings Park Western Australia Australia
| | - Eve Slavich
- School of Mathematics and Statistics UNSW Sydney Sydney New South Wales Australia
| | - Miriam Muñoz‐Rojas
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences UNSW Sydney Sydney New South Wales Australia
- Department of Plant Biology and Ecology University of Seville Seville Spain
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Gao Y, Chen Y, Luo Y, Liu J, Tian P, Nan Z, Zhou Q. The microbiota diversity of Festuca sinensis seeds in Qinghai-Tibet Plateau and their relationship with environments. Front Microbiol 2022; 13:956489. [PMID: 35992719 PMCID: PMC9382023 DOI: 10.3389/fmicb.2022.956489] [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: 05/30/2022] [Accepted: 07/01/2022] [Indexed: 11/15/2022] Open
Abstract
A total of 14 Festuca sinensis seed lots were collected from different geographical locations on the Qinghai-Tibet Plateau to study the seed microbiota and determine the abiotic (temperature, precipitation, and elevation) and biotic (Epichloë sinensis infection rate) factors likely to shape the seed microbiome. The 14 seed lots had different bacterial and fungal structures and significantly different diversities (p < 0.05). The α-diversity indices of the bacteria were significantly correlated with precipitation (p < 0.05), whereas those of the fungi were significantly correlated with temperature (p < 0.05). Microbiota analysis showed that Proteobacteria, Cyanobacteria, and Bacteroidetes were the most abundant bacteria at the phylum level in the seeds, and Ascomycota and Basidiomycota were the most abundant fungi. β-diversity analysis suggested large differences in the microbial communities of each sample. Redundancy analysis showed that temperature and precipitation were the main environmental factors that drive variations in the microbial community, at the medium-high elevation (3,000–4,500 m), the impact of temperature and precipitation on microbial community is different, and the other elevations that effect on microbial community were basically identical. Spearman's correlation analysis showed that the relative abundances of the most abundant bacterial phyla were significantly correlated with temperature (p < 0.05), whereas those of the most abundant fungal phyla were significantly correlated with precipitation (p < 0.05). E. sinensis infection rates were significantly correlated with elevation and temperature (p < 0.05). These results suggest that temperature and precipitation are the key factors driving the microbial community, that temperature and elevation also had a great influence on the E. sinensis infection rate, and that environmental factors (temperature and elevation) may further affect the microbial community by regulating the E. sinensis infection rate.
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Affiliation(s)
- Yue Gao
- State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou University, Lanzhou, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Youjun Chen
- Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
| | - Yang Luo
- State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou University, Lanzhou, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Junying Liu
- State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou University, Lanzhou, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Pei Tian
- State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou University, Lanzhou, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- *Correspondence: Pei Tian
| | - Zhibiao Nan
- State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Lanzhou University, Lanzhou, China
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Qingping Zhou
- Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, China
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Berto B, Brown VS. 10 years to restore the planet: a seedy situation. Restor Ecol 2022. [DOI: 10.1111/rec.13755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bianca Berto
- School of Biological Sciences The University of Western Australia Crawley Western Australia 6009 Australia
- Kings Park Science, Department of Biodiversity Conservation and Attractions, Kings Park Western Australia 6005 Australia
| | - Vanessa S. Brown
- School of Biological Sciences The University of Western Australia Crawley Western Australia 6009 Australia
- Kings Park Science, Department of Biodiversity Conservation and Attractions, Kings Park Western Australia 6005 Australia
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Metwally RA, Abdelhameed RE, Soliman SA, Al-Badwy AH. Potential use of beneficial fungal microorganisms and C-phycocyanin extract for enhancing seed germination, seedling growth and biochemical traits of Solanum lycopersicum L. BMC Microbiol 2022; 22:108. [PMID: 35448979 PMCID: PMC9027073 DOI: 10.1186/s12866-022-02509-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 03/21/2022] [Indexed: 12/03/2022] Open
Abstract
Background Biopriming as a new technique of seed treatment involves the application of beneficial microorganisms on the seed surface to stimulate seed germination, plant growth, and protect the seed from soil and seed-borne pathogens. The present investigation was carried out on seed germination, seedling vigor and biochemical traits of one of the most important vegetable crops (Tomato, Solanum lycopersicum L.). The treatments comprised viz. T1: Non primed seeds (Control), T2: Hydropriming, T3: Biopriming with C-phycocyanin (C-PC) (Spirulina platensis extract), T4: Biopriming with Trichoderma asperellum, T5: Biopriming with T. viride, T6: Biopriming with Beauveria bassiana. Results Extraction and purification of C-phycocyanin (C-PC) from the dry S. platensis powder using various methods was performed. The purity after dialyses was 0.49 and its ultimate purity (A620/A280) after ion-exchange chromatography was 4.64. The results on tomato seedlings revealed that the maximum germination percentage (100%), germination index (15.46 and 15.12), seedling length (10.67 cm), seedling dry weight (1.73 and 1.97 mg) and seedling length vigor index (1066.7) were recorded for tomato biopriming with T. viride, and B. bassiana (T5 and T6). Moreover, the quantitative estimation of total carbohydrates and total free amino acids contents in bioprimed tomato seedlings indicated a significantly higher amount with T. viride, followed by those bioprimed with T. asperellum, B. bassiana and C-PC extract. Conclusion Thus, our results indicated that biopriming of tomato seeds with beneficial fungal inoculants and C-PC was very effective. The most operative biostimulants were those bioprimed with T. viride and B. bassiana compared to other biostimulants (T. asperellum and C-PC). Therefore, to ensure sustainable agriculture, this study offers new possibilities for the biopriming application as an alternative and ecological management strategy to chemical treatment and provides a valuable basis for improving seed germination.
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Affiliation(s)
- Rabab A Metwally
- Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Reda E Abdelhameed
- Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
| | - Shereen A Soliman
- Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Asmaa H Al-Badwy
- Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
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Kollmen J, Strieth D. The Beneficial Effects of Cyanobacterial Co-Culture on Plant Growth. Life (Basel) 2022; 12:life12020223. [PMID: 35207509 PMCID: PMC8879750 DOI: 10.3390/life12020223] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/21/2022] [Accepted: 01/30/2022] [Indexed: 11/16/2022] Open
Abstract
Cyanobacteria are ubiquitous phototrophic prokaryotes that find a wide range of applications in industry due to their broad product spectrum. In this context, the application of cyanobacteria as biofertilizers and thus as an alternative to artificial fertilizers has emerged in recent decades. The benefit is mostly based on the ability of cyanobacteria to fix elemental nitrogen and make it available to the plants in a usable form. However, the positive effects of co-cultivating plants with cyanobacteria are not limited to the provision of nitrogen. Cyanobacteria produce numerous secondary metabolites that can be useful for plants, for example, they can have growth-promoting effects or increase resistance to plant diseases. The effects of biotic and abiotic stress can as well be reduced by many secondary metabolites. Furthermore, the biofilms formed by the cyanobacteria can lead to improved soil conditions, such as increased water retention capacity. To exchange the substances mentioned, cyanobacteria form symbioses with plants, whereby the strength of the symbiosis depends on both partners, and not every plant can form symbiosis with every cyanobacterium. Not only the plants in symbiosis benefit from the cyanobacteria, but also vice versa. This review summarizes the beneficial effects of cyanobacterial co-cultivation on plants, highlighting the substances exchanged and the strength of cyanobacterial symbioses with plants. A detailed explanation of the mechanism of nitrogen fixation in cyanobacterial heterocysts is given. Finally, a summary of possible applications of co-cultivation in the (agrar-)industry is given.
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Shahbazi M, Tohidfar M, Azimzadeh Irani M, Moheb Seraj RG. Functional annotation and evaluation of hypothetical proteins in cyanobacterium Synechocystis sp. PCC 6803. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2021.102246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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12
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Brown VS, Erickson TE, Merritt DJ, Madsen MD, Hobbs RJ, Ritchie AL. A global review of seed enhancement technology use to inform improved applications in restoration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 798:149096. [PMID: 34340083 DOI: 10.1016/j.scitotenv.2021.149096] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/01/2021] [Accepted: 07/13/2021] [Indexed: 06/13/2023]
Abstract
Seed-based restoration often experiences poor success due to a range of edaphic and biotic issues. Seed enhancement technologies (SETs) are a novel approach that can alleviate these pressures and improve restoration success. Broadly, SETs have been reviewed for agricultural and horticultural purposes, for specific types of SETs such as coating or priming, or for focal ecosystems. However, information is lacking for SETs within a restoration focused context, and how they are being used to alleviate certain barriers. This review aimed to synthesise the current literature on SETs to understand what SETs are being tested, in which sectors and locations they are being tested, what issues are faced within restoration using SETs, and how SETs are being used to approach these issues. Priming was highlighted as the main SET investigated. Inoculation, pesticide application and magnetic fields were also commonly tested (SETs we termed 'prospective techniques'). SET research mainly occurred in the agricultural sector. More recently, other sectors, such as restoration and rangeland management, have increased efforts into SET research. The restoration sector has focused on extruded pelleting and coating (with activated carbon), in combination with herbicide application, to overcome invasive species, and coating with certain additives to alleviate edaphic issues. Other sectors outside restoration were largely focused on evaluating priming for overcoming these barriers. The majority of priming research has been completed on crop species and differences between these species and ecosystems must be considered in future restoration efforts that focus on native seed use. Generally, SETs require further refinement, including identifying ideal additives and their optimum concentrations to target certain issues, refining formulations for coating and extruded pelleting and developing flash flaming. A bet-hedging approach using multiple SETs and/or combinations of SETs may be advantageous in overcoming a wide range of barriers in seed-based restoration.
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Affiliation(s)
- Vanessa S Brown
- School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia; Kings Park Science, Department of Biodiversity Conservation and Attractions, 2 Kattidj Close, Kings Park, Western Australia, 6005, Australia.
| | - Todd E Erickson
- School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia; Kings Park Science, Department of Biodiversity Conservation and Attractions, 2 Kattidj Close, Kings Park, Western Australia, 6005, Australia
| | - David J Merritt
- School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia; Kings Park Science, Department of Biodiversity Conservation and Attractions, 2 Kattidj Close, Kings Park, Western Australia, 6005, Australia
| | - Matthew D Madsen
- Department of Plant and Wildlife Sciences, Brigham Young University, 701 East University Parkway, Provo, UT 84602, United States of America
| | - Richard J Hobbs
- School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
| | - Alison L Ritchie
- School of Biological Sciences, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia; Kings Park Science, Department of Biodiversity Conservation and Attractions, 2 Kattidj Close, Kings Park, Western Australia, 6005, Australia
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13
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Stock E, Standish RJ, Muñoz-Rojas M, Bell RW, Erickson TE. Field-Deployed Extruded Seed Pellets Show Promise for Perennial Grass Establishment in Arid Zone Mine Rehabilitation. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.576125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Current methods of mine rehabilitation in the arid zone have a high failure rate at seedling emergence largely due to limited availability of topsoil and low water-holding capacity of alternative growth substrates such as mining overburden and tailings. Further, seedlings have consistently failed to emerge from seeds sown on the soil surface using traditional broadcasting methods. Seed pellets, formed by extruding soil mixtures and seeds into pellets, can potentially increase soil water uptake through enhanced soil-seed contact and thereby improve seedling emergence. We tested an extruded seed pelleting method in a three-factor field experiment (i.e., different pellet-soil mixtures, organic amendments, and simulated rainfall regimes) in north-western Australia. Given the observed lack of seedling emergence from broadcast seeds, the aims of the experiment were to assess: (i) the use of pellets to promote native seedling emergence and establishment and; (ii) the soil physico-chemical and microbiological changes that occur with this method of rehabilitation. The effects of pellet-soil mixtures, organic amendment, and rainfall regime on seedling emergence and survival of three native plant species suggest trade-offs among responses. Pellets made with a 1:1 blend of topsoil and a loamy-sand waste material had the highest seedling emergence, while 100% topsoil pellets had lower emergence probably because of hardsetting. Triodia pungens (a native grass) survived to the end of the experiment while Indigofera monophylla and Acacia inaequilatera (native shrubs) emerged but did not survive. Adding an organic amendment in the extruded pellet inhibited Triodia seedling emergence but increased soil microbial activity. Overall, extruded pellets made from a 1:1 blend showed promise for the establishment of Triodia seeds and beneficially, incorporates mine waste overburden and lesser amounts of topsoil. Further research is needed to improve pelleting production and to test the applicability of the method at scale, for different species and other ecosystem types.
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Antoninka A, Faist A, Rodriguez‐Caballero E, Young KE, Chaudhary VB, Condon LA, Pyke DA. Biological soil crusts in ecological restoration: emerging research and perspectives. Restor Ecol 2020. [DOI: 10.1111/rec.13201] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Anita Antoninka
- School of Forestry Northern Arizona University 200 E Pine Knoll Drive, Flagstaff AZ 86011 U.S.A
| | - Akasha Faist
- Department of Animal and Range Sciences New Mexico State University Box 30003 MSC 3‐I, Las Cruces NM 88003 U.S.A
| | - Emilio Rodriguez‐Caballero
- Centro de Investigación de Colecciones Científicas de la Universidad de Almería (CECOUAL) University of Almería 04120 Almería Spain
| | - Kristina E. Young
- Department of Biological Sciences University of Texas at El Paso 500 West University Avenue, El Paso TX 79968 U.S.A
| | - V. Bala Chaudhary
- Department of Environmental Science and Studies DePaul University 1110 West Belden Avenue, Chicago IL 60614 U.S.A
| | - Lea A. Condon
- U.S. Geological Survey Forest and Rangeland Ecosystem Science Center Corvallis OR 97331 U.S.A
| | - David A. Pyke
- U.S. Geological Survey Forest and Rangeland Ecosystem Science Center Corvallis OR 97331 U.S.A
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