1
|
Chen Y, Bonkowski M, Shen Y, Griffiths BS, Jiang Y, Wang X, Sun B. Root ethylene mediates rhizosphere microbial community reconstruction when chemically detecting cyanide produced by neighbouring plants. MICROBIOME 2020; 8:4. [PMID: 31954405 PMCID: PMC6969408 DOI: 10.1186/s40168-019-0775-6] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 12/09/2019] [Indexed: 05/03/2023]
Abstract
BACKGROUND Stress-induced hormones are essential for plants to modulate their microbiota and dynamically adjust to the environment. Despite the emphasis of the role of the phytohormone ethylene in the plant physiological response to heterospecific neighbour detection, less is known about how this activated signal mediates focal plant rhizosphere microbiota to enhance plant fitness. Here, using 3 years of peanut (Arachis hypogaea L.), a legume, and cyanide-containing cassava (Manihot esculenta Crantz) intercropping and peanut monocropping field, pot and hydroponic experiments in addition to exogenous ethylene application and soil incubation experiments, we found that ethylene, a cyanide-derived signal, is associated with the chemical identification of neighbouring cassava and the microbial re-assemblage in the peanut rhizosphere. RESULTS Ethylene production in peanut roots can be triggered by cyanide production of neighbouring cassava plants. This gaseous signal alters the microbial composition and re-assembles the microbial co-occurrence network of peanut by shifting the abundance of an actinobacterial species, Catenulispora sp., which becomes a keystone in the intercropped peanut rhizosphere. The re-assembled rhizosphere microbiota provide more available nutrients to peanut roots and support seed production. CONCLUSIONS Our findings suggest that root ethylene acts as a signal with a dual role. It plays a role in perceiving biochemical cues from interspecific neighbours, and also has a regulatory function in mediating the rhizosphere microbial assembly, thereby enhancing focal plant fitness by improving seed production. This discovery provides a promising direction to develop novel intercropping strategies for targeted manipulations of the rhizosphere microbiome through phytohormone signals. Video abstract.
Collapse
Affiliation(s)
- Yan Chen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, 210008 China
| | - Michael Bonkowski
- Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str 47b, 50674 Cologne, Germany
- Cluster of Excellence on Plant Sciences (CEPLAS), University of Cologne, Cologne, Germany
| | - Yi Shen
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, No.50 Zhonglin Street, Nanjing, 210014 China
| | - Bryan S. Griffiths
- SRUC, Crop and Soil System Research Group, West Mains Road, Edinburgh, EH93JG UK
| | - Yuji Jiang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, 210008 China
| | - Xiaoyue Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, 210008 China
| | - Bo Sun
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, 210008 China
| |
Collapse
|
2
|
Kishikawa A, Inoue M, Tarutani S, Okunishi T, Ina R, Yoshida K, Takada N, Yoshida M. Screening of Sesame Cultivars with Scant Albumins by an Immunological Approach. FOOD BIOTECHNOL 2018. [DOI: 10.1080/08905436.2018.1519445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Maya Inoue
- Department of Agricultural Science, Kinki University, Nara, Japan
| | - Shotaro Tarutani
- Department of Agricultural Science, Kinki University, Nara, Japan
| | - Takumi Okunishi
- Department of Agricultural Science, Kinki University, Nara, Japan
| | - Rie Ina
- Department of Agricultural Science, Kinki University, Nara, Japan
| | | | | | - Motonobu Yoshida
- Department of Agricultural Science, Kinki University, Nara, Japan
- Osaka University of Comprehensive Children Education, Osaka, Japan
| |
Collapse
|
3
|
The Multiplanetary Future of Plant Synthetic Biology. Genes (Basel) 2018; 9:genes9070348. [PMID: 29996548 PMCID: PMC6071031 DOI: 10.3390/genes9070348] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 11/24/2022] Open
Abstract
The interest in human space journeys to distant planets and moons has been re-ignited in recent times and there are ongoing plans for sending the first manned missions to Mars in the near future. In addition to generating oxygen, fixing carbon, and recycling waste and water, plants could play a critical role in producing food and biomass feedstock for the microbial manufacture of materials, chemicals, and medicines in long-term interplanetary outposts. However, because life on Earth evolved under the conditions of the terrestrial biosphere, plants will not perform optimally in different planetary habitats. The construction or transportation of plant growth facilities and the availability of resources, such as sunlight and liquid water, may also be limiting factors, and would thus impose additional challenges to efficient farming in an extraterrestrial destination. Using the framework of the forthcoming human missions to Mars, here we discuss a series of bioengineering endeavors that will enable us to take full advantage of plants in the context of a Martian greenhouse. We also propose a roadmap for research on adapting life to Mars and outline our opinion that synthetic biology efforts towards this goal will contribute to solving some of the main agricultural and industrial challenges here on Earth.
Collapse
|
4
|
Chizoba Ekezie FG, Cheng JH, Sun DW. Effects of nonthermal food processing technologies on food allergens: A review of recent research advances. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.01.007] [Citation(s) in RCA: 125] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
5
|
Wu T, Li Z, Liu R, Sui W, Zhang M. Effect of Extrusion, Steam Explosion and Enzymatic Hydrolysis on Functional Properties of Wheat Bran. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2018. [DOI: 10.3136/fstr.24.591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Tao Wu
- State Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology); Engineering Research Center of Food Biotechnology, Ministry of Education
| | - Zhi Li
- State Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology); Engineering Research Center of Food Biotechnology, Ministry of Education
| | - Rui Liu
- State Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology); Engineering Research Center of Food Biotechnology, Ministry of Education
| | - Wenjie Sui
- State Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology); Engineering Research Center of Food Biotechnology, Ministry of Education
| | - Min Zhang
- State Key Laboratory of Food Nutrition and Safety (Tianjin University of Science and Technology); Engineering Research Center of Food Biotechnology, Ministry of Education
| |
Collapse
|
6
|
Abstract
The CRISPR system for gene editing can break, repair, and replace targeted sections of DNA. Although CRISPR gene editing has important therapeutic potential, it raises several ethical concerns. Some bioethicists worry CRISPR is a prelude to a dystopian future, while others maintain it should not be feared because it is analogous to past biotechnologies. In the scientific literature, CRISPR is often discussed as a revolutionary technology. In this paper we unpack the framing of CRISPR as a revolutionary technology and contrast it with framing it as a value-threatening biotechnology or business-as-usual. By drawing on a comparison between CRISPR and the Ford Model T, we argue CRISPR is revolutionary as a product, process, and as a force for social change. This characterization of CRISPR offers important conceptual clarity to the existing debates surrounding CRISPR. In particular, conceptualizing CRISPR as a revolutionary technology structures regulatory goals with respect to this new technology. Revolutionary technologies have characteristic patterns of implementation, entrenchment, and social impact. As such, early identification of technologies as revolutionary may help construct more nuanced and effective ethical frameworks for public policy.
Collapse
|
7
|
Definition und Design hypoallergener Nahrungsmittel. ALLERGO JOURNAL 2015. [DOI: 10.1007/s15007-015-0942-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
8
|
Abstract
Peanut is recognized as a potent food allergen producing one of the most frequent food allergies. This fact has originated the publication of an elevated number of scientific reports dealing with peanut allergens and, especially, the prevalence of peanut allergy. For this reason, the information available on peanut allergens is increasing and the debate about peanut allergy is always renewed. This article reviews the information currently available on peanut allergens and on the techniques used for their chemical characterization. Moreover, a general overview on the current biotechnological approaches used to reduce or eliminate peanut allergens is also provided.
Collapse
Affiliation(s)
- Jorge Sáiz
- Department of Chemistry I, Faculty of Biology, Environmental Sciences, and Chemistry, University of Alcalá, 28871 Alcalá de Henares, Madrid, Spain
| | | | | | | |
Collapse
|
9
|
Morandini P. Control limits for accumulation of plant metabolites: brute force is no substitute for understanding. PLANT BIOTECHNOLOGY JOURNAL 2013; 11:253-267. [PMID: 23301840 DOI: 10.1111/pbi.12035] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 11/13/2012] [Accepted: 11/19/2012] [Indexed: 06/01/2023]
Abstract
Which factors limit metabolite accumulation in plant cells? Are theories on flux control effective at explaining the results? Many biotechnologists cling to the idea that every pathway has a rate limiting enzyme and target such enzymes first in order to modulate fluxes. This often translates into large effects on metabolite concentration, but disappointing small increases in flux. Rate limiting enzymes do exist, but are rare and quite opposite to what predicted by biochemistry. In many cases however, flux control is shared among many enzymes. Flux control and concentration control can (and must) be distinguished and quantified for effective manipulation. Flux control for several 'building blocks' of metabolism is placed on the demand side, and therefore increasing demand can be very successful. Tampering with supply, particularly desensitizing supply enzymes, is usually not very effective, if not dangerous, because supply regulatory mechanisms function to control metabolite homeostasis. Some important, but usually unnoticed, metabolic constraints shape the responses of metabolic systems to manipulation: mass conservation, cellular resource allocation and, most prominently, energy supply, particularly in heterotrophic tissues. The theoretical basis for this view shall be explored with recent examples gathered from the manipulation of several metabolites (vitamins, carotenoids, amino acids, sugars, fatty acids, polyhydroxyalkanoates, fructans and sugar alcohols). Some guiding principles are suggested for an even more successful engineering of plant metabolism.
Collapse
Affiliation(s)
- Piero Morandini
- Department of Biosciences, University of Milan and CNR Institute of Biophysics, Milan, Italy.
| |
Collapse
|
10
|
Lambers H, Clements JC, Nelson MN. How a phosphorus-acquisition strategy based on carboxylate exudation powers the success and agronomic potential of lupines (Lupinus, Fabaceae). AMERICAN JOURNAL OF BOTANY 2013; 100:263-88. [PMID: 23347972 DOI: 10.3732/ajb.1200474] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Lupines (Lupinus species; Fabaceae) are an ancient crop with great potential to be developed further for high-protein feed and food, cover crops, and phytoremediation. Being legumes, they are capable of symbiotically fixing atmospheric nitrogen. However, Lupinus species appear to be nonmycorrhizal or weakly mycorrhizal at most; instead some produce cluster roots, which release vast amounts of phosphate-mobilizing carboxylates (inorganic anions). Other lupines produce cluster-like roots, which function in a similar manner, and some release large amounts of carboxylates without specialized roots. These traits associated with nutrient acquisition make lupines ideally suited for either impoverished soils or soils with large amounts of phosphorus that is poorly available for most plants, e.g., acidic or alkaline soils. Here we explore how common the nonmycorrhizal phosphorus-acquisition strategy based on exudation of carboxylates is in the genus Lupinus, concluding it is very likely more widespread than generally acknowledged. This trait may partly account for the role of lupines as pioneers or invasive species, but also makes them suitable crop plants while we reach "peak phosphorus".
Collapse
Affiliation(s)
- Hans Lambers
- School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia.
| | | | | |
Collapse
|
11
|
Menezes SP, dos Santos JL, Cardoso THS, Pirovani CP, Micheli F, Noronha FSM, Alves AC, Faria AMC, da Silva Gesteira A. Evaluation of the allergenicity potential of TcPR-10 protein from Theobroma cacao. PLoS One 2012; 7:e37969. [PMID: 22768037 PMCID: PMC3387164 DOI: 10.1371/journal.pone.0037969] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 04/27/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The pathogenesis related protein PR10 (TcPR-10), obtained from the Theobroma cacao-Moniliophthora perniciosa interaction library, presents antifungal activity against M. perniciosa and acts in vitro as a ribonuclease. However, despite its biotechnological potential, the TcPR-10 has the P-loop motif similar to those of some allergenic proteins such as Bet v 1 (Betula verrucosa) and Pru av 1 (Prunus avium). The insertion of mutations in this motif can produce proteins with reduced allergenic power. The objective of the present work was to evaluate the allergenic potential of the wild type and mutant recombinant TcPR-10 using bioinformatics tools and immunological assays. METHODOLOGY/PRINCIPAL FINDINGS Mutant substitutions (T10P, I30V, H45S) were inserted in the TcPR-10 gene by site-directed mutagenesis, cloned into pET28a and expressed in Escherichia coli BL21(DE3) cells. Changes in molecular surface caused by the mutant substitutions was evaluated by comparative protein modeling using the three-dimensional structure of the major cherry allergen, Pru av 1 as a template. The immunological assays were carried out in 8-12 week old female BALB/c mice. The mice were sensitized with the proteins (wild type and mutants) via subcutaneous and challenged intranasal for induction of allergic airway inflammation. CONCLUSIONS/SIGNIFICANCE We showed that the wild TcPR-10 protein has allergenic potential, whereas the insertion of mutations produced proteins with reduced capacity of IgE production and cellular infiltration in the lungs. On the other hand, in vitro assays show that the TcPR-10 mutants still present antifungal and ribonuclease activity against M. perniciosa RNA. In conclusion, the mutant proteins present less allergenic potential than the wild TcPR-10, without the loss of interesting biotechnological properties.
Collapse
Affiliation(s)
| | | | | | | | - Fabienne Micheli
- UESC, Centro de Biotecnologia e Genética, Ilhéus, Bahia, Brasil
- CIRAD, UMAR AGAP, Montpellier, France
| | | | - Andréa Catão Alves
- UFMG, Instituto de Ciências Biológicas, Pampulha, Belo Horizonte, Minas Gerais, Brasil
| | | | | |
Collapse
|
12
|
|
13
|
Abstract
Plants have evolved a variety of gene silencing pathways mediated by small RNAs. Mostly 21 or 24 nt in size, these small RNAs repress the expression of sequence homologous genes at the transcriptional, post-transcriptional and translational levels. These pathways, also referred as RNA silencing pathways, play important roles in regulating growth and development as well as in response to both biotic and abiotic stress. Although the molecular basis of these complicated and interconnected pathways has become clear only in recent years, RNA silencing effects were observed and utilized in transgenic plants early in the plant biotechnology era, more than two decades ago. Today, with a better understanding of the pathways, various genetic engineering approaches have been developed to apply RNA silencing more effectively and broadly. In addition to summarizing the current models of RNA silencing, this review discusses examples of its potential uses and related issues concerning its application in plant biotechnology.
Collapse
Affiliation(s)
- Alessandra Frizzi
- Calgene Campus, Monsanto Company, 1920 Fifth Street, Davis, CA 95616, USA
| | | |
Collapse
|
14
|
Chemical ecology in coupled human and natural systems: people, manioc, multitrophic interactions and global change. CHEMOECOLOGY 2010. [DOI: 10.1007/s00049-010-0047-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
15
|
Rommens CM. Barriers and paths to market for genetically engineered crops. PLANT BIOTECHNOLOGY JOURNAL 2010; 8:101-111. [PMID: 19968823 DOI: 10.1111/j.1467-7652.2009.00464.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Each year, billions of dollars are invested in efforts to improve crops through genetic engineering (GE). These activities have resulted in a surge of publications and patents on technologies and genes: a momentum in basic research that, unfortunately, is not sustained throughout the subsequent phases of product development. After more than two decades of intensive research, the market for transgenic crops is still dominated by applications of just a handful of methods and genes. This discrepancy between research and development reflects difficulties in understanding and overcoming seven main barriers-to-entry: (1) trait efficacy in the field, (2) critical product concepts, (3) freedom-to-operate, (4) industry support, (5) identity preservation and stewardship, (6) regulatory approval and (7) retail and consumer acceptance. In this review, I describe the various roadblocks to market for transgenic crops and also discuss methods and approaches on how to overcome these, especially in the United States.
Collapse
|
16
|
|
17
|
Maghuly F, Marzban G, Laimer M. Functional genomics of allergen gene families in fruits. Nutrients 2009; 1:119-32. [PMID: 22253972 PMCID: PMC3257604 DOI: 10.3390/nu1020119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Accepted: 10/21/2009] [Indexed: 12/19/2022] Open
Abstract
Fruit consumption is encouraged for health reasons; however, fruits may harbour a series of allergenic proteins that may cause discomfort or even represent serious threats to certain individuals. Thus, the identification and characterization of allergens in fruits requires novel approaches involving genomic and proteomic tools. Since avoidance of fruits also negatively affects the quality of patients' lives, biotechnological interventions are ongoing to produce low allergenic fruits by down regulating specific genes. In this respect, the control of proteins associated with allergenicity could be achieved by fine tuning the spatial and temporal expression of the relevant genes.
Collapse
Affiliation(s)
- Fatemeh Maghuly
- Plant Biotechnology Unit, IAM, Department of Biotechnology, VIBT BOKU, 1190 Vienna, Austria.
| | | | | |
Collapse
|