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Banasaz S, Ferraro V. Keratin from Animal By-Products: Structure, Characterization, Extraction and Application-A Review. Polymers (Basel) 2024; 16:1999. [PMID: 39065316 PMCID: PMC11280741 DOI: 10.3390/polym16141999] [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: 05/13/2024] [Revised: 06/10/2024] [Accepted: 06/21/2024] [Indexed: 07/28/2024] Open
Abstract
Keratin is a structural fibrous protein and the core constituent of animal by-products from livestock such as wool, feathers, hooves, horns, and pig bristles. This natural polymer is also the main component of human hair and is present at an important percentage in human and animal skin. Significant amounts of keratin-rich animal tissues are discarded worldwide each year, ca. 12 M tons, and the share used for keratin extraction and added-value applications is still very low. An important stream of new potential raw materials, represented by animal by-products and human hair, is thus being lost, while a large-scale valorization could contribute to a circular bioeconomy and to the reduction in the environmental fingerprint of those tissues. Fortunately, scientific research has made much important progress in the last 10-15 years in the better understanding of the complex keratin architecture and its variability among different animal tissues, in the development of tailored extraction processes, and in the screening of new potential applications. Hence, this review aims at a discussion of the recent findings in the characterization of keratin and keratin-rich animal by-product structures, as well as in keratin recovery by conventional and emerging techniques and advances in valorization in several fields.
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Samantaray A, Chattaraj S, Mitra D, Ganguly A, Kumar R, Gaur A, Mohapatra PK, Santos-Villalobos SDL, Rani A, Thatoi H. Advances in microbial based bio-inoculum for amelioration of soil health and sustainable crop production. CURRENT RESEARCH IN MICROBIAL SCIENCES 2024; 7:100251. [PMID: 39165409 PMCID: PMC11334944 DOI: 10.1016/j.crmicr.2024.100251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2024] Open
Abstract
The adoption of sustainable agricultural practices is increasingly imperative in addressing global food security and environmental concerns, with microbial based bio-inoculums emerging as a promising approach for nurturing soil health and fostering sustainable crop production.This review article explores the potential of microbial based bio-inoculumsor biofertilizers as a transformative approach toenhance plant disease resistance and growth. It explores the commercial prospects of biofertilizers, highlighting their role in addressing environmental concerns associated with conventional fertilizers while meeting the growing demand for eco-friendly agricultural practices. Additionally, this review discusses the future prospects of biofertilizers, emphasizing the ongoing advancements in biotechnology and formulation techniques that are expected to enhance their efficacy and applicability. Furthermore, this article provides insights into strategies for the successful acceptance of biofertilizers among farmers, including the importance of quality control, assurance, and education initiatives to raise awareness about their benefits and overcome barriers to adoption. By synthesizing the current research findings and industrial developments, this review offers valuable guidance for stakeholders seeking to exploit the potential of biofertilizers or beneficial microbes to promote soil health, ensure sustainable crop production, and addressing the challenges of modern agriculture.
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Affiliation(s)
- Aurodeepa Samantaray
- Centre for Industrial Biotechnology Research, School of Pharmaceutical Sciences, Siksha ‘O’ Anusandhan, Deemed to be University, Kalinga Nagar, Bhubaneswar, Odisha 751003, India
| | - Sourav Chattaraj
- Centre for Industrial Biotechnology Research, School of Pharmaceutical Sciences, Siksha ‘O’ Anusandhan, Deemed to be University, Kalinga Nagar, Bhubaneswar, Odisha 751003, India
| | - Debasis Mitra
- Department of Microbiology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India
| | - Arindam Ganguly
- Department of Microbiology, Bankura Sammilani College, Bankura, West Bengal 722102, India
| | - Rahul Kumar
- Department of Microbiology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India
| | - Ashish Gaur
- Department of Biotechnology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India
| | - Pradeep K.Das Mohapatra
- Department of Microbiology, Raiganj University, Uttar Dinajpur, Raiganj, West Bengal 733134, India
| | | | - Anju Rani
- Department of Microbiology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand 248002, India
| | - Hrudayanath Thatoi
- Centre for Industrial Biotechnology Research, School of Pharmaceutical Sciences, Siksha ‘O’ Anusandhan, Deemed to be University, Kalinga Nagar, Bhubaneswar, Odisha 751003, India
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Benaissa A. Rhizosphere: Role of bacteria to manage plant diseases and sustainable agriculture-A review. J Basic Microbiol 2024; 64:e2300361. [PMID: 37800617 DOI: 10.1002/jobm.202300361] [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: 06/24/2023] [Revised: 09/05/2023] [Accepted: 09/17/2023] [Indexed: 10/07/2023]
Abstract
General plant diseases as well as soil-borne pathogens severely reduce agricultural yield. The rhizosphere (the region of the soil that includes and surrounds the roots) is an important niche for microbial diversity in particular phytobeneficial bacteria including plant growth-promoting rhizobacteria (PGPR) which have been used for a very long time to combat plant diseases. Pathogen control and crop productivity can both be improved through the use of PGPR several mechanisms, including iron-based nutrition, antibiotics, volatile substances, enzymes, biofilm, allelochemicals, and so on. Their modes of action and molecular mechanisms have improved our comprehension of how they are used to control crop disease. Therefore, there is a lot of literal information available regarding PGPR, but this review stands out since it starts with the fundamentals: the concept of the rhizosphere and the colonization process of the latter, particularly because it covers the most mechanisms. A broad figure is used to present the study's findings. The advantages of using PGPR as bioinoculants in sustainable agriculture are also mentioned.
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Affiliation(s)
- Asmaa Benaissa
- Laboratory of Biology and Physiology of Organisms, Faculty of Biological Sciences, University of Sciences and Technology of Houari Boumediene-El-Alia Bab Ezzouar Algiers, Algeria
- Department of Biology, University of Amine Elokkal ElHadj Moussa Eg. Akhamoukh, Sersouf, Tamanrasset, Algeria
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You F, Li S. Environmental regulations, green development of agriculture, and residents' health-empirical analysis of Yangtze River Economic Belt in China. PeerJ 2023; 11:e15717. [PMID: 37520248 PMCID: PMC10386822 DOI: 10.7717/peerj.15717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 06/16/2023] [Indexed: 08/01/2023] Open
Abstract
Environmental pollution and food safety have become key public health issues to be addressed in China. Since they are closely related to the green development of agriculture, it is of great practical significance to elucidate the intrinsic relationships between green development of agriculture, environmental regulation and residents' health. Based on the panel data of the Yangtze River Economic Belt from 2011 to 2020, this study investigates the impacts of environmental regulation and green development of agriculture on residents' health and the influencing mechanism by applying fixed effects method, mediating effectsmethod and the spatial Dubin method. Results show that the use of chemical fertilizers, pesticides and agricultural films is harmful to residents' health; environmental regulation has a negative correlation with the green development of agriculture and affect residents' health through mediating effects; the green development of agriculture has negative spillover effects on residents' health, indicating that purchasing finished products instead of producing locally reduces the input of production factors such as chemical fertilizers and pesticides and transfers health risks associated with agricultural production activities to neighboring areas. Intensifying command-and-control environmental regulation will induce the expansion of hidden economic activities and harm local residents' health, while intensifying market-incentive environmental regulation will lead to the 'Pollution Haven' phenomenon because of the 'race to the bottom', in government and is harmful to the health of residents in neighboring areas. Therefore, it is necessary to formulate reasonable and feasible policies and strengthen the control and prevention of agricultural pollution to enhance green development of agriculture and improve residents' health.
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Affiliation(s)
- Fuling You
- School of Management Science and Real Estate, Chongqing University, Chongqing, China
| | - Shilong Li
- School of Management Science and Real Estate, Chongqing University, Chongqing, China
- Research Center for Construction Economics and Management, Chongqing University, Chongqing, China
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Omar AF, Abdelmageed AHA, Al-Turki A, Abdelhameid NM, Sayyed RZ, Rehan M. Exploring the Plant Growth-Promotion of Four Streptomyces Strains from Rhizosphere Soil to Enhance Cucumber Growth and Yield. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11233316. [PMID: 36501356 PMCID: PMC9737303 DOI: 10.3390/plants11233316] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/24/2022] [Accepted: 11/26/2022] [Indexed: 05/13/2023]
Abstract
The genus Streptomyces is the most abundant and essential microbes in the soil microbial community. Streptomyces are familiar and have great potential to produce a large variety of bioactive compounds. This genus considers an efficient biofertilizer based on its plant growth-promoting activities. Based on their ability to produce a wide varieties of bioactive molecules, the present study aimed to explore the potential plant growth promotion of four Streptomyces strains and their role in enhancing cucumber growth and yield under greenhouse conditions. Streptomyces sp. strain HM2, Streptomyces thinghirensis strain HM3, Streptomyces sp. strain HM8, and Streptomyces tricolor strain HM10 were chosen for the current study. Plant growth-promoting (PGP) features, i.e., indole acetic acid (IAA) production, siderophore excretion, and solubilizing phosphate, were evaluated in vitro. All four strains produced IAA, siderophore, and immobilized inorganic phosphate. Following 4 days of incubation at 30 °C, strains HM2, HM3, HM8, and HM10 produced copious amounts of IAA (18, 22, 62, and 146 µg/mL, respectively) and siderophores (42.59, 40.01, 16.84, 64.14% SU, respectively). At the same time, P solubilization efficacy scored 64.3%, 84.4%, 57.2%, and 81.6% with the same frequency. During in planta evaluation, selected Streptomyces strains combined with rock phosphate were assessed as biofertilizers on the growth and yield of cucumber plants. Under all treatments, positive and significant differences in studied traits were manifested except dry stem matter (SDM), net assimilation rate (NAR), relative growth rate (RGR), and fruit firmness (FF). Treatment T4 (rock phosphate + strain HM3) followed by T5 (rock phosphate + strain HM8) revealed the best results for plant height (PH), number of leaves per plant (NLPP), root length (RL), number of fruits per plant (NFPP), fruit length (FL), fruit diameter (FD), fruit fresh weight per plant (FFWPP), soil P (SP) after 21 DAT, and soil P at the end of the experiment. Notably, T6 (rock phosphate + strain HM10) caused a considerable increase in leaf area (LA). Plant growth-promoting bacteria enhance plant growth and yield through phosphorus solubilizing, improve nutrient availability, produce phytohormones, and support plant growth under abiotic stress. These features are important for sustainable agriculture and reducing environmental pollution with chemical fertilizers and pesticides.
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Affiliation(s)
- Ayman F. Omar
- Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
- Plant Pathology and Biotechnology Lab, EPCRS Excellence Center, Department of Plant Pathology, Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
| | - Adil H. A. Abdelmageed
- Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Horticulture, University of Khartoum, Shambat, Khartoum North 13314, Sudan
| | - Ahmad Al-Turki
- Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
| | - Noha M. Abdelhameid
- Desert Research Center (DRC), Soil Fertility and Microbiology Department, Cairo 11753, Egypt
| | - R. Z. Sayyed
- PSGVP Mandal’s S I Patil Arts, G B Patel Science & STKVS Commerce College, Shahada 425409, India
| | - Medhat Rehan
- Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Genetics, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
- Correspondence: or
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Zheng S, Yin K, Cao Z. Factors influencing the farmer's chemical fertilizer reduction behavior from the perspective of farmer differentiation. Heliyon 2022; 8:e11918. [DOI: 10.1016/j.heliyon.2022.e11918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/04/2022] [Accepted: 11/17/2022] [Indexed: 11/30/2022] Open
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Loo WT, Chua KO, Mazumdar P, Cheng A, Osman N, Harikrishna JA. Arbuscular Mycorrhizal Symbiosis: A Strategy for Mitigating the Impacts of Climate Change on Tropical Legume Crops. PLANTS (BASEL, SWITZERLAND) 2022; 11:2875. [PMID: 36365329 PMCID: PMC9657156 DOI: 10.3390/plants11212875] [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: 10/05/2022] [Revised: 10/22/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Climate change is likely to have severe impacts on food security in the topics as these regions of the world have both the highest human populations and narrower climatic niches, which reduce the diversity of suitable crops. Legume crops are of particular importance to food security, supplying dietary protein for humans both directly and in their use for feed and forage. Other than the rhizobia associated with legumes, soil microbes, in particular arbuscular mycorrhizal fungi (AMF), can mitigate the effects of biotic and abiotic stresses, offering an important complementary measure to protect crop yields. This review presents current knowledge on AMF, highlights their beneficial role, and explores the potential for application of AMF in mitigating abiotic and biotic challenges for tropical legumes. Due to the relatively little study on tropical legume species compared to their temperate growing counterparts, much further research is needed to determine how similar AMF-plant interactions are in tropical legumes, which AMF species are optimal for agricultural deployment and especially to identify anaerobic AMF species that could be used to mitigate flood stress in tropical legume crop farming. These opportunities for research also require international cooperation and support, to realize the promise of tropical legume crops to contribute to future food security.
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Affiliation(s)
- Wan Teng Loo
- Centre for Research in Biotechnology for Agriculture, University of Malaya, Kuala Lumpur 50603, Malaysia
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Kah-Ooi Chua
- Centre for Research in Biotechnology for Agriculture, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Purabi Mazumdar
- Centre for Research in Biotechnology for Agriculture, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Acga Cheng
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Normaniza Osman
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Jennifer Ann Harikrishna
- Centre for Research in Biotechnology for Agriculture, University of Malaya, Kuala Lumpur 50603, Malaysia
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
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Nishshanka GKSH, Anthonio RADP, Nimarshana PHV, Ariyadasa TU, Chang JS. Marine microalgae as sustainable feedstock for multi-product biorefineries. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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The Effect of Land Right Stability on the Application of Fertilizer Reduction Technologies—Evidence from Large-Scale Farmers in China. SUSTAINABILITY 2022. [DOI: 10.3390/su14138059] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This article examines the impact of the stability of the management rights of transferred land (TLMR) on the adoption of technologies aiming to reduce the use of chemical fertilizers (ARFTs) based on the survey data of large-scale grain growing households in Anhui, China. Using the IV-Probit model, the present paper defines the stability of TLMR and the results estimated by IV-Probit model shows that a one-year extension of land lease period can increase the probability of using organic fertilizer and soil-testing formula fertilizer by 3.16% and 4.92%, respectively, while contract breaching in the lease period can reduce the probability of using organic fertilizer and soil-testing formula fertilizer by 46.9% and 51.38%, respectively. However, the land-lease period and land transfer contract breaching in the lease period have no significant effect on the use of farmyard manure by large-scale grain growing households. The main conclusion is that improving the stability of TLMR is conducive to prompting large-scale grain growing households to adopt ARFTs, especially the adoption of organic fertilizer and soil-testing formula fertilizer. The government should improve the stability of TLMR by standardizing the form and content associated with land transfer contracts and setting the minimum land-lease term.
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