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Pyatina SA, Shishatskaya EI, Dorokhin AS, Menzyanova NG. Border cell population size and oxidative stress in the root apex of Triticum aestivum seedlings exposed to fungicides. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:25600-25615. [PMID: 38478309 DOI: 10.1007/s11356-024-32840-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 03/05/2024] [Indexed: 04/19/2024]
Abstract
Fungicides reduce the risk of mycopathologies and reduce the content of mycotoxins in commercial grain. The effect of fungicides on the structural and functional status of the root system of grain crops has not been studied enough. In this regard, we studied the phytocytotoxic effects tebuconazole (TEB) and epoxiconazole (EPO) and azoxystrobin (AZO) in the roots of Triticum aestivum seedlings in hydroponic culture. In the presence of EPO and AZO (but not TEB) inhibition of the root growth was accompanied by a dose-dependent increase in the content of malondialdehyde, carbonylated proteins, and proline in roots. TEB was characterized by a dose-dependent decrease in the total amount of border cells (BCs) and the protein content in root extracellular trap (RET). For EPO and AZO, the dose curves of changes in the total number of BCs were bell-shaped. AZO did not affect the protein content in RET. The protein content in RET significantly decreased by 3 times for an EPO concentration of 1 µg/mL. The obtained results reveal that the BC-RET system is one of the functional targets of fungicides in the root system of wheat seedlings. Studied fungicides induce oxidative stress and structural and functional alterations in the BC-RET system that can affect their toxicity to the root system of crops.
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Affiliation(s)
| | - Ekaterina Igorevna Shishatskaya
- Siberian Federal University, 79 Svobodnyi Av, Krasnoyarsk, 660041, Russia
- Institute of Biophysics SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", 50/50 Akademgorodok, Krasnoyarsk, 660036, Russia
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Mao J, Hu G, Deng W, Zhao M, Li J. Industrial wastewater treatment using floating wetlands: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:5043-5070. [PMID: 38150162 DOI: 10.1007/s11356-023-31507-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 12/08/2023] [Indexed: 12/28/2023]
Abstract
Industrial wastewater generated from various production processes is often associated with elevated pollutant concentrations and environmental hazards, necessitating efficient treatment. Floating wetlands (FWs) have emerged as a promising and eco-friendly solution for industrial wastewater treatment, with numerous successful field applications. This article comprehensively reviews the removal mechanisms and treatment performance in the use of FWs for the treatment of diverse industrial wastewaters. Our findings highlight that the performance of FWs relies on proper plant selection, design, aeration, season and temperature, plants harvesting and disposal, and maintenance. Well-designed FWs demonstrate remarkable effectiveness in removing organic matter (COD and BOD), suspended solids, nutrients, and heavy metals from industrial wastewater. This effectiveness is attributed to the intricate physical and metabolic interactions between plants and microbial communities within FWs. A significant portion of the reported applications of FWs revolve around the treatment of textile and oily wastewater. In particular, the application reports of FWs are mainly concentrated in temperate developing countries, where FWs can serve as a feasible and cost-effective industrial wastewater treatment technology, replacing high-cost traditional technologies. Furthermore, our analysis reveals that the treatment efficiency of FWs can be significantly enhanced through strategies like bacterial inoculation, aeration, and co-plantation of specific plant species. These techniques offer promising directions for further research. To advance the field, we recommend future research efforts focus on developing novel floating materials, optimizing the selection and combination of plants and microorganisms, exploring flexible disposal methods for harvested biomass, and designing multi-functional FW systems.
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Affiliation(s)
- Jianliang Mao
- School of Engineering, Environmental Engineering Program, University of Northern British Columbia (UNBC), 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada
| | - Guangji Hu
- School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, Shandong Province, China
| | - Wei Deng
- School of Engineering, Environmental Engineering Program, University of Northern British Columbia (UNBC), 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada
| | - Min Zhao
- School of Life and Environmental Sciences, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang Province, China
- WZU-UNBC Joint Research Institute of Ecology and Environment, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang Province, China
| | - Jianbing Li
- School of Engineering, Environmental Engineering Program, University of Northern British Columbia (UNBC), 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada.
- WZU-UNBC Joint Research Institute of Ecology and Environment, Wenzhou University (WZU), Wenzhou, 325035, Zhejiang Province, China.
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Wang Q, Zhou X, He S, Wang W, Ma D, Wang Y, Zhang H. Receptor Plants Alleviated Allelopathic Stress from Invasive Chenopodium ambrosioides L. by Upregulating the Production and Autophagy of Their Root Border Cells. PLANTS (BASEL, SWITZERLAND) 2023; 12:3810. [PMID: 38005707 PMCID: PMC10674979 DOI: 10.3390/plants12223810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 10/23/2023] [Accepted: 10/31/2023] [Indexed: 11/26/2023]
Abstract
Chenopodium ambrosioides L. is an invasive plant native to the Neotropics that has seriously threatened the ecological security of China, and allelopathy is one of the mechanisms underlying its successful invasion. Maize (Zea mays L.) and soybean (Glycine max (L.) Merr.), as the main food crops, are usually affected by C. ambrosioides in their planting areas. The purpose of this study was to investigate the ultrastructure, autophagy, and release-related gene expression of receptor plant root border cells (RBCs) after exposure to volatile oil from C. ambrosioides and its main component α-terpene, which were studied using maize and soybean as receptor plants. The volatiles inhibited root growth and promoted a brief increase in the number of RBCs. As the volatile concentration increased, the organelles in RBCs were gradually destroyed, and intracellular autophagosomes were produced and continuously increased in number. Transcriptomic analysis revealed that genes involved in the synthesis of the plasma membrane and cell wall components in receptor root cells were significantly up-regulated, particularly those related to cell wall polysaccharide synthesis. Meanwhile, polygalacturonase and pectin methylesterases (PME) exhibited up-regulated expression, and PME activity also increased. The contribution of α-terpene to this allelopathic effect of C. ambrosioides volatile oil exceeded 70%. Based on these results, receptor plant root tips may increase the synthesis of cell wall substances while degrading the intercellular layer, accelerating the generation and release of RBCs. Meanwhile, their cells survived through autophagy of RBCs, indicating the key role of RBCs in alleviating allelopathic stress from C. ambrosioides volatiles.
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Affiliation(s)
- Qiang Wang
- College of Life Science, Sichuan Normal University, Chengdu 610101, China; (Q.W.); (X.Z.); (S.H.); (Y.W.); (H.Z.)
| | - Xijie Zhou
- College of Life Science, Sichuan Normal University, Chengdu 610101, China; (Q.W.); (X.Z.); (S.H.); (Y.W.); (H.Z.)
| | - Shengli He
- College of Life Science, Sichuan Normal University, Chengdu 610101, China; (Q.W.); (X.Z.); (S.H.); (Y.W.); (H.Z.)
| | - Wenguo Wang
- Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China
| | - Danwei Ma
- College of Life Science, Sichuan Normal University, Chengdu 610101, China; (Q.W.); (X.Z.); (S.H.); (Y.W.); (H.Z.)
| | - Yu Wang
- College of Life Science, Sichuan Normal University, Chengdu 610101, China; (Q.W.); (X.Z.); (S.H.); (Y.W.); (H.Z.)
| | - Hong Zhang
- College of Life Science, Sichuan Normal University, Chengdu 610101, China; (Q.W.); (X.Z.); (S.H.); (Y.W.); (H.Z.)
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Busont O, Durambur G, Bernard S, Plasson C, Joudiou C, Baude L, Chefdor F, Depierreux C, Héricourt F, Larcher M, Malik S, Boulogne I, Driouich A, Carpin S, Lamblin F. Black Poplar (Populus nigra L.) Root Extracellular Trap, Structural and Molecular Remodeling in Response to Osmotic Stress. Cells 2023; 12:cells12060858. [PMID: 36980198 PMCID: PMC10047092 DOI: 10.3390/cells12060858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/04/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023] Open
Abstract
The root extracellular trap (RET) consists of root-associated, cap-derived cells (root AC-DCs) and their mucilaginous secretions, and forms a structure around the root tip that protects against biotic and abiotic stresses. However, there is little information concerning the changes undergone by the RET during droughts, especially for tree species. Morphological and immunocytochemical approaches were used to study the RET of black poplar (Populus nigra L.) seedlings grown in vitro under optimal conditions (on agar-gelled medium) or when polyethylene glycol-mediated (PEG6000—infused agar-gelled medium) was used to mimic drought conditions through osmotic stress. Under optimal conditions, the root cap released three populations of individual AC-DC morphotypes, with a very low proportion of spherical morphotypes, and equivalent proportions of intermediate and elongated morphotypes. Immunolabeling experiments using anti-glycan antibodies specific to cell wall polysaccharide and arabinogalactan protein (AGP) epitopes revealed the presence of homogalacturonan (HG), galactan chains of rhamnogalacturonan-I (RG-I), and AGPs in root AC-DC cell walls. The data also showed the presence of xylogalacturonan (XGA), xylan, AGPs, and low levels of arabinans in the mucilage. The findings also showed that under osmotic stress conditions, both the number of AC-DCs (spherical and intermediate morphotypes) and the total quantity of mucilage per root tip increased, whereas the mucilage was devoid of the epitopes associated with the polysaccharides RG-I, XGA, xylan, and AGPs. Osmotic stress also led to reduced root growth and increased root expression of the P5CS2 gene, which is involved in proline biosynthesis and cellular osmolarity maintenance (or preservation) in aerial parts. Together, our findings show that the RET is a dynamic structure that undergoes pronounced structural and molecular remodeling, which might contribute to the survival of the root tip under osmotic conditions.
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Affiliation(s)
- Océane Busont
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - Gaëlle Durambur
- GLYCOMEV UR 4358, SFR Normandie Végétal FED 4277, Innovation Chimie Carnot, University of Rouen Normandie, IRIB, F-76000 Rouen, France
| | - Sophie Bernard
- GLYCOMEV UR 4358, SFR Normandie Végétal FED 4277, Innovation Chimie Carnot, University of Rouen Normandie, IRIB, F-76000 Rouen, France
- INSERM, CNRS, HeRacLeS US 51 UAR 2026, PRIMACEN, University of Rouen Normandie, F-76000 Rouen, France
| | - Carole Plasson
- GLYCOMEV UR 4358, SFR Normandie Végétal FED 4277, Innovation Chimie Carnot, University of Rouen Normandie, IRIB, F-76000 Rouen, France
| | - Camille Joudiou
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - Laura Baude
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
- Department of Biology, University of Fribourg, CH-1700 Fribourg, Switzerland
| | - Françoise Chefdor
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - Christiane Depierreux
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - François Héricourt
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - Mélanie Larcher
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - Sonia Malik
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - Isabelle Boulogne
- GLYCOMEV UR 4358, SFR Normandie Végétal FED 4277, Innovation Chimie Carnot, University of Rouen Normandie, IRIB, F-76000 Rouen, France
| | - Azeddine Driouich
- GLYCOMEV UR 4358, SFR Normandie Végétal FED 4277, Innovation Chimie Carnot, University of Rouen Normandie, IRIB, F-76000 Rouen, France
| | - Sabine Carpin
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
| | - Frédéric Lamblin
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, Université d’Orléans, INRAE, USC 1328, CEDEX 2, F-45067 Orléans, France
- Correspondence: ; Tel.: +33-(0)2-3841-7127
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Yang K, Wang L, Cao X, Gu Z, Zhao G, Ran M, Yan Y, Yan J, Xu L, Gao C, Yang M. The Origin, Function, Distribution, Quantification, and Research Advances of Extracellular DNA. Int J Mol Sci 2022; 23:13690. [PMID: 36430193 PMCID: PMC9698649 DOI: 10.3390/ijms232213690] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022] Open
Abstract
In nature, DNA is ubiquitous, existing not only inside but also outside of the cells of organisms. Intracellular DNA (iDNA) plays an essential role in different stages of biological growth, and it is defined as the carrier of genetic information. In addition, extracellular DNA (eDNA) is not enclosed in living cells, accounting for a large proportion of total DNA in the environment. Both the lysis-dependent and lysis-independent pathways are involved in eDNA release, and the released DNA has diverse environmental functions. This review provides an insight into the origin as well as the multiple ecological functions of eDNA. Furthermore, the main research advancements of eDNA in the various ecological environments and the various model microorganisms are summarized. Furthermore, the major methods for eDNA extraction and quantification are evaluated.
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Affiliation(s)
- Kaixin Yang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lishuang Wang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xinghong Cao
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhaorui Gu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guowei Zhao
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Mengqu Ran
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yunjun Yan
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jinyong Yan
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Li Xu
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Chunhui Gao
- State Key Laboratory of Agricultural Microbiology, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Min Yang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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Li W, Ullah S, Xu Y, Bai T, Ye S, Jiang W, Yang M. Effects of Elevated Aluminum Concentration and Distribution on Root Damage, Cell Wall Polysaccharides, and Nutrient Uptake in Different Tolerant Eucalyptus Clones. Int J Mol Sci 2022; 23:13438. [PMID: 36362232 PMCID: PMC9657315 DOI: 10.3390/ijms232113438] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/30/2022] [Accepted: 10/31/2022] [Indexed: 05/12/2024] Open
Abstract
Aluminized acidic soil can damage Eucalyptus roots and limit tree growth, hindering the productivity of Eucalyptus plantations. At present, the negative impacts of elevated aluminum (Al) on the cell morphology and cell wall properties of Eucalyptus root tip are still unclear. In order to investigate the responses of two different tolerant clones, Eucalyptus urophylla (G4) and Eucalyptus grandis × Eucalyptus urophylla (G9), to Al toxicity, seedling roots were treated hydroponically with an Al solution, and the polysaccharide content in the root tip cell wall and the characteristics of programmed cell death were studied. The results show that the distribution of Al was similar in both clones, although G9 was found to be more tolerant to Al toxicity than G4. The Al3+ uptake of pectin in root tip cell walls was significantly higher in G4 than in G9. The root tip in G4 was obviously damaged, enlarged, thickened, and shorter; the root crown cells were cracked and fluffy; and the cell elongation area was squeezed. The lower cell wall polysaccharide content and PME activity may result in fewer carboxylic groups in the root tip cell wall to serve as Al-binding sites, which may explain the stronger Al resistance of G9 than G4. The uptake of nitrogen and potassium in G4 was significantly reduced after aluminum application and was lower than in G9. Al-resistant Eucalyptus clones may have synergistic pleiotropic effects in resisting high aluminum-low phosphorus stress, and maintaining higher nitrogen and potassium levels in roots may be an important mechanism for effectively alleviating Al toxicity.
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Affiliation(s)
- Wannian Li
- Guangxi Key Laboratory of Forest Ecology and Conservation, Forestry College, Guangxi University, Nanning 530004, China
- Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Forestry College, Guangxi University, Nanning 530004, China
| | - Saif Ullah
- Guangxi Key Laboratory of Forest Ecology and Conservation, Forestry College, Guangxi University, Nanning 530004, China
- Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Forestry College, Guangxi University, Nanning 530004, China
| | - Yuanyuan Xu
- Guangxi Key Laboratory of Forest Ecology and Conservation, Forestry College, Guangxi University, Nanning 530004, China
- Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Forestry College, Guangxi University, Nanning 530004, China
| | - Tiandao Bai
- Guangxi Key Laboratory of Forest Ecology and Conservation, Forestry College, Guangxi University, Nanning 530004, China
- Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Forestry College, Guangxi University, Nanning 530004, China
| | - Shaoming Ye
- Guangxi Key Laboratory of Forest Ecology and Conservation, Forestry College, Guangxi University, Nanning 530004, China
- Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Forestry College, Guangxi University, Nanning 530004, China
| | - Weixin Jiang
- Guangxi Key Laboratory of Forest Ecology and Conservation, Forestry College, Guangxi University, Nanning 530004, China
- Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Forestry College, Guangxi University, Nanning 530004, China
| | - Mei Yang
- Guangxi Key Laboratory of Forest Ecology and Conservation, Forestry College, Guangxi University, Nanning 530004, China
- Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Forestry College, Guangxi University, Nanning 530004, China
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Xiao Z, Liang Y. Silicon prevents aluminum from entering root tip by promoting formation of root border cells in rice. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 175:12-22. [PMID: 35158318 DOI: 10.1016/j.plaphy.2022.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/08/2021] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
Root border cells (RBCs) and their mucilage are considered to play an important role in protecting root tip from aluminum (Al) toxicity, but their interactions with silicon (Si) under Al stress still remain unclear. Here, we investigated the effect of Si on the formation of RBCs under Al stress and the related detoxification mechanism in hydroponically grown rice (Oryza sativa L.). The results showed that Si could prevent the separation of RBCs from each other by increasing the degree of pectin methylesterification in root tip cell wall, thereby keeping more RBCs around the root tip. Also, Si maintained the viability of RBCs, increased the amount of mucilage, and reduced the content of total Al and free Al in root tips. Moreover, the RBCs accumulated more Al and Si simultaneously than root tip in the Al treatments with Si supply. Overall, these results indicated that Si reduced the toxicity of Al to RBCs through formation of Si-Al complex on the RBCs, thereby improving the viability of RBCs and promoting the secretion of mucilage. Concomitantly, Si, RBCs and their mucilage could form a protective sheath at the root tip, which prevented Al from diffusing into the root tip, thereby alleviating Al toxicity in rice root tips.
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Affiliation(s)
- Zhuoxi Xiao
- Ministry of Education Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Yongchao Liang
- Ministry of Education Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
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Egendorf SP, Spliethoff HM, Shayler HA, Russell-Anelli J, Cheng Z, Minsky AH, King T, McBride MB. Soil lead (Pb) and urban grown lettuce: Sources, processes, and implications for gardener best management practices. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 286:112211. [PMID: 33667819 DOI: 10.1016/j.jenvman.2021.112211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/25/2021] [Accepted: 02/15/2021] [Indexed: 06/12/2023]
Abstract
Urban community gardeners employ a range of best practices that limit crop contamination by toxicants like lead (Pb). While Pb root uptake is generally low, the relative significance of various Pb deposition processes and the effectiveness of best practices in reducing these processes have not been sufficiently characterized. This study compared leafy lettuce (Lactuca sativa) grown in high Pb (1150 mg/kg) and low Pb (90 mg/kg) soils, under three different soil cover conditions: 1) bare soil, 2) mulch cover to limit splash, and 3) mulch cover under hoophouses to limit splash and air deposition, in a New York City (NYC) community garden and a rural site in Ithaca, New York (NY). The lettuces were further compared to greenhouse (Ithaca) and supermarket (NYC) samples. Atmospheric deposition was monitored by passive trap collection through funnel samplers. Results show that in low Pb soils, splash and atmospheric deposition accounted for 84 and 78% of lettuce Pb in NYC and Ithaca, respectively. In high Pb soils, splash and atmospheric deposition accounted for 88 and 93% of Pb on lettuces, with splash being the dominant mechanism. Soil covers were shown to be effective at significantly (p < 0.05) reducing lettuce Pb contamination, and mulching is strongly recommended as a best practice.
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Affiliation(s)
- Sara Perl Egendorf
- Brooklyn College of the City University of New York, Department of Earth and Environmental Sciences, 2900 Bedford Ave, Brooklyn, NY, 11210, USA; The Graduate Center of the City University of New York, Department of Earth and Environmental Sciences, 365 5th Ave, New York, 10016, USA; The Advanced Science Research Center at the Graduate Center of the City University of New York, Environmental Sciences Initiative, 85 St. Nicholas Terrace, New York, 10031, USA.
| | - Henry M Spliethoff
- Center for Environmental Health, New York State Department of Health, Corning Tower Room 1743, Empire State Plaza, Albany, NY, 12237, USA
| | - Hannah A Shayler
- Cornell University, School of Integrative Plant Science, Soil and Crop Sciences Section, 233 Emerson Hall, Ithaca, NY, 14853, USA
| | - Jonathan Russell-Anelli
- Cornell University, School of Integrative Plant Science, Soil and Crop Sciences Section, 233 Emerson Hall, Ithaca, NY, 14853, USA
| | - Zhongqi Cheng
- Brooklyn College of the City University of New York, Department of Earth and Environmental Sciences, 2900 Bedford Ave, Brooklyn, NY, 11210, USA; The Graduate Center of the City University of New York, Department of Earth and Environmental Sciences, 365 5th Ave, New York, 10016, USA
| | - Anna Heming Minsky
- Brooklyn College of the City University of New York, Department of Earth and Environmental Sciences, 2900 Bedford Ave, Brooklyn, NY, 11210, USA
| | - Thomas King
- New York State Department of Agriculture and Markets, 6 Harriman Campus Road, Albany, NY, 11206, USA
| | - Murray B McBride
- Cornell University, School of Integrative Plant Science, Soil and Crop Sciences Section, 233 Emerson Hall, Ithaca, NY, 14853, USA
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Yuan P, Pan H, Boak EN, Pierson LS, Pierson EA. Phenazine-Producing Rhizobacteria Promote Plant Growth and Reduce Redox and Osmotic Stress in Wheat Seedlings Under Saline Conditions. FRONTIERS IN PLANT SCIENCE 2020; 11:575314. [PMID: 33133116 PMCID: PMC7550623 DOI: 10.3389/fpls.2020.575314] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/01/2020] [Indexed: 05/23/2023]
Abstract
Application of plant growth promoting bacteria may induce plant salt stress tolerance, however the underpinning microbial and plant mechanisms remain poorly understood. In the present study, the specific role of phenazine production by rhizosphere-colonizing Pseudomonas in mediating the inhibitory effects of salinity on wheat seed germination and seedling growth in four different varieties was investigated using Pseudomonas chlororaphis 30-84 (wild type) and isogenic derivatives deficient or enhanced in phenazine production. The results showed that varieties differed in how they responded to the salt stress treatment and the benefits derived from colonization by P. chlororaphis 30-84. In all varieties, the salt stress treatment significantly reduced seed germination, and in seedlings, reduced relative water content, increased reactive oxygen species (ROS) levels in leaves, and in three of four varieties, reduced shoot and root production compared to the no salt stress treatment. Inoculation of seeds with Pseudomonas chlororaphis 30-84 wild type or derivatives promoted salt-stress tolerance in seedlings of the four commercial winter wheat varieties tested, but the salt-stress tolerance phenotype was not entirely due to phenazine production. For example, all P. chlororaphis derivatives (including the phenazine-producing mutant) significantly improved relative water content in two varieties, Iba and CV 1, for which the salt stress treatment had a large impact. Importantly, all P. chlororaphis derivatives enabled the salt inhibited wheat varieties studied to maintain above ground productivity in saline conditions. However, only phenazine-producing derivatives enhanced the shoot or root growth of seedlings of all varieties under nonsaline conditions. Notably, ROS accumulation was reduced, and antioxidant enzyme (catalase) activity enhanced in the leaves of seedlings grown in saline conditions that were seed-treated with phenazine-producing P. chlororaphis derivatives as compared to noninoculated seedlings. The results demonstrate the capacity of P. chlororaphis to improve salt tolerance in wheat seedlings by promoting plant growth and reducing osmotic stress and a role for bacterial phenazine production in reducing redox stress.
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Affiliation(s)
- Peiguo Yuan
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
| | - Huiqiao Pan
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
- Molecular and Environmental Plant Sciences Program, Texas A&M University, College Station, TX, United States
| | - Emily N. Boak
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
| | - Leland S. Pierson
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, United States
| | - Elizabeth A. Pierson
- Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States
- Molecular and Environmental Plant Sciences Program, Texas A&M University, College Station, TX, United States
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, United States
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10
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Peco JD, Campos JA, Romero-Puertas MC, Olmedilla A, Higueras P, Sandalio LM. Characterization of mechanisms involved in tolerance and accumulation of Cd in Biscutella auriculata L. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 201:110784. [PMID: 32485494 DOI: 10.1016/j.ecoenv.2020.110784] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/04/2020] [Accepted: 05/18/2020] [Indexed: 05/19/2023]
Abstract
Biscutella auriculata L. is one of the rare species that is able to grow in a very contaminated mining area in Villamayor de Calatrava (Ciudad Real, Spain). In an effort to understand the mechanisms involved in the tolerance of this plant to high metal concentrations, we grew B. auriculata in the presence of 125 μM Cd(NO3)2 for 15 days and analysed different parameters associated with plant growth, nitric oxide and reactive oxygen species metabolism, metal uptake and translocation, photosynthesis rate and biothiol (glutathione and phytochelatins) content. Treatment with Cd led to growth inhibition in both the leaves and the roots, as well as a reduction of photosynthetic parameters, transpiration and stomatal conductance. The metal was mainly accumulated in the roots and in the vascular tissue, although most Cd was detected in areas surrounding their epidermal cells, while in the leaves the metal accumulated mainly in spongy mesophyll, stomata and trichrome. Based on the Cd bioaccumulation (5.93) and translocation (0.15) factors, this species denoted enrichment of the metal in the roots and its low translocation to the upper tissues. Biothiol analysis showed a Cd-dependent increase of reduced glutathione (GSH) as well as the phytochelatins (PC2 and PC3) in both roots and leaves. Cd-promoted oxidative damage occurred mainly in the leaves due to disturbances in enzymatic and nonenzymatic antioxidants, while the roots did not show significant damage as a result of induction of antioxidant defences. It can be concluded that B. auriculata is a new Cd-tolerant plant with an ability to activate efficient metal-sequestering mechanisms in the root surface and leaves and to induce PCs, as well as antioxidative defences in roots.
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Affiliation(s)
- J D Peco
- Escuela Técnica Superior de Ingenieros Agrónomos, Universidad de Castilla-La Mancha (UCLM). Ronda de Calatrava, 7, 13071, Ciudad Real, Spain; Instituto de Geología Aplicada, Universidad de Castilla-La Mancha (UCLM). Plaza de Manuel Meca, 1, 13400, Almadén, Ciudad Real, Spain
| | - J A Campos
- Escuela Técnica Superior de Ingenieros Agrónomos, Universidad de Castilla-La Mancha (UCLM). Ronda de Calatrava, 7, 13071, Ciudad Real, Spain; Instituto de Geología Aplicada, Universidad de Castilla-La Mancha (UCLM). Plaza de Manuel Meca, 1, 13400, Almadén, Ciudad Real, Spain
| | - M C Romero-Puertas
- Department of Biochemistry Cellular and Molecular Biology of Plants, Estación Experimental Del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Profesor Albareda 1, 18008, Granada, Spain
| | - A Olmedilla
- Department of Biochemistry Cellular and Molecular Biology of Plants, Estación Experimental Del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Profesor Albareda 1, 18008, Granada, Spain
| | - P Higueras
- Instituto de Geología Aplicada, Universidad de Castilla-La Mancha (UCLM). Plaza de Manuel Meca, 1, 13400, Almadén, Ciudad Real, Spain
| | - L M Sandalio
- Department of Biochemistry Cellular and Molecular Biology of Plants, Estación Experimental Del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Profesor Albareda 1, 18008, Granada, Spain.
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11
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Implementation of Floating Treatment Wetlands for Textile Wastewater Management: A Review. SUSTAINABILITY 2020. [DOI: 10.3390/su12145801] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The textile industry is one of the most chemically intensive industries, and its wastewater is comprised of harmful dyes, pigments, dissolved/suspended solids, and heavy metals. The treatment of textile wastewater has become a necessary task before discharge into the environment. The textile effluent can be treated by conventional methods, however, the limitations of these techniques are high cost, incomplete removal, and production of concentrated sludge. This review illustrates recent knowledge about the application of floating treatment wetlands (FTWs) for remediation of textile wastewater. The FTWs system is a potential alternative technology for textile wastewater treatment. FTWs efficiently removed the dyes, pigments, organic matter, nutrients, heavy metals, and other pollutants from the textile effluent. Plants and bacteria are essential components of FTWs, which contribute to the pollutant removal process through their physical effects and metabolic process. Plants species with extensive roots structure and large biomass are recommended for vegetation on floating mats. The pollutant removal efficiency can be enhanced by the right selection of plants, managing plant coverage, improving aeration, and inoculation by specific bacterial strains. The proper installation and maintenance practices can further enhance the efficiency, sustainability, and aesthetic value of the FTWs. Further research is suggested to develop guidelines for the selection of right plants and bacterial strains for the efficient remediation of textile effluent by FTWs at large scales.
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12
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Ma J, Feng X, Yang X, Cao Y, Zhao W, Sun L. The leaf extract of crofton weed ( Eupatorium adenophorum) inhibits primary root growth by inducing cell death in maize root border cells. PLANT DIVERSITY 2020; 42:174-180. [PMID: 32695950 PMCID: PMC7361134 DOI: 10.1016/j.pld.2020.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 02/12/2020] [Accepted: 02/14/2020] [Indexed: 05/24/2023]
Abstract
The extract of crofton weed (Eupatorium adenophorum) inhibits seed germination and weed growth; however, the physiological mechanisms underlying the effect of crofton weed extract on the modulation of seedling growth and root system development remain largely unclear. In this study, we investigated the effects of the leaf extract of crofton weed (LECW) on primary root (PR) growth in maize seedlings. Treatment with LECW markedly inhibited seed germination and seedling growth in a dose-dependent manner. Physiological analysis indicated that the LECW induced reactive oxygen species (ROS) accumulation in root tips, thereby leading to cell swelling and deformation both in the root cap and elongation zone of root tips, finally leading to cell death in root border cells (RBCs) and PR growth inhibition. The LECW also inhibited pectin methyl esterase (PME) activity, thereby decreasing the RBC number. Taken together, our results indicated that the LECW inhibited PR growth by inducing ROS accumulation and subsequent cell death in RBCs. The present study provides a better understanding of how the LECW modifies root system development and provides insight for evaluating the toxicity of crofton weed extracts in plants.
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Affiliation(s)
- Jinhu Ma
- College of Engineering, Shanxi Agricultural University, Taigu, 030801, China
| | - Xinxin Feng
- College of Horticulture, Shanxi Agricultural University, Taigu, 030801, China
| | - Xiaohuan Yang
- College of Agriculture, Shanxi Agricultural University, Taigu, 030801, China
| | - Yongheng Cao
- College of Agriculture, Shanxi Agricultural University, Taigu, 030801, China
| | - Weifeng Zhao
- Faculty of Tropical Crops, Yunnan Agricultural University, Puer, 665000, China
| | - Liangliang Sun
- College of Agriculture, Shanxi Agricultural University, Taigu, 030801, China
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13
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Neumann A, Brogden G, von Köckritz-Blickwede M. Extracellular Traps: An Ancient Weapon of Multiple Kingdoms. BIOLOGY 2020; 9:biology9020034. [PMID: 32085405 PMCID: PMC7168307 DOI: 10.3390/biology9020034] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 12/31/2022]
Abstract
The discovery, in 2004, of extracellular traps released by neutrophils has extended our understanding of the mode of action of various innate immune cells. This fascinating discovery demonstrated the extracellular trapping and killing of various pathogens by neutrophils. During the last decade, evidence has accumulated showing that extracellular traps play a crucial role in the defence mechanisms of various cell types present in vertebrates, invertebrates, and plants. The aim of this review is to summarise the relevant literature on the evolutionary history of extracellular traps used as a weapon in various kingdoms of life.
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Affiliation(s)
- Ariane Neumann
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Baravägen 27, 22184 Lund, Sweden;
| | - Graham Brogden
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Buenteweg 17, 30559 Hannover, Germany;
| | - Maren von Köckritz-Blickwede
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Buenteweg 17, 30559 Hannover, Germany;
- Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Bünteweg 17, 30559 Hannover, Germany
- Correspondence: ; Tel.: +49-511-953-8787
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14
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Monticolo F, Palomba E, Termolino P, Chiaiese P, de Alteriis E, Mazzoleni S, Chiusano ML. The Role of DNA in the Extracellular Environment: A Focus on NETs, RETs and Biofilms. FRONTIERS IN PLANT SCIENCE 2020; 11:589837. [PMID: 33424885 PMCID: PMC7793654 DOI: 10.3389/fpls.2020.589837] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 11/25/2020] [Indexed: 05/06/2023]
Abstract
The capacity to actively release genetic material into the extracellular environment has been reported for bacteria, archaea, fungi, and in general, for microbial communities, but it is also described in the context of multicellular organisms, animals and plants. This material is often present in matrices that locate outside the cells. Extracellular matrices have important roles in defense response and disease in microbes, animal and plants cells, appearing as barrier against pathogen invasion or for their recognition. Specifically, neutrophils extracellular traps (NETs) in animals and root extracellular traps (RETs) in plants, are recognized to be important players in immunity. A growing amount of evidence revealed that the extracellular DNA, in these contexts, plays an active role in the defense action. Moreover, the protective role of extracellular DNA against antimicrobials and mechanical stress also appears to be confirmed in bacterial biofilms. In parallel, recent efforts highlighted different roles of self (homologous) and non-self (heterologous) extracellular DNA, paving the way to discussions on its role as a "Damage-associated molecular pattern" (DAMP). We here provide an evolutionary overview on extracellular DNA in extracellular matrices like RETs, NETs, and microbial biofilms, discussing on its roles and inferring on possible novel functionalities.
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Affiliation(s)
- Francesco Monticolo
- Department of Agricultural Sciences, Università degli Studi di Napoli Federico II, Portici, Italy
| | - Emanuela Palomba
- Department of Research Infrastructures for Marine Biological Resources, Stazione Zoologica “Anton Dohrn”, Naples, Italy
| | - Pasquale Termolino
- Institute of Biosciences and Bioresources, National Research Council, Portici, Italy
| | - Pasquale Chiaiese
- Department of Agricultural Sciences, Università degli Studi di Napoli Federico II, Portici, Italy
| | | | - Stefano Mazzoleni
- Department of Agricultural Sciences, Università degli Studi di Napoli Federico II, Portici, Italy
| | - Maria Luisa Chiusano
- Department of Agricultural Sciences, Università degli Studi di Napoli Federico II, Portici, Italy
- Department of Research Infrastructures for Marine Biological Resources, Stazione Zoologica “Anton Dohrn”, Naples, Italy
- *Correspondence: Maria Luisa Chiusano,
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15
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Huskey DA, Curlango‐Rivera G, Hawes MC. Use of rhodizonic acid for rapid detection of root border cell trapping of lead and reversal of trapping with DNase. APPLICATIONS IN PLANT SCIENCES 2019; 7:e01240. [PMID: 31024783 PMCID: PMC6476171 DOI: 10.1002/aps3.1240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/22/2019] [Indexed: 06/09/2023]
Abstract
PREMISE OF THE STUDY Lead (Pb) is a contaminant whose removal from soil remains a challenge. In a previous study, border cells released from root tips were found to trap Pb, alter its chemistry, and prevent root uptake. Rhodizonic acid (RA) is a forensic tool used to reveal gunshot residue, and also to detect Pb within plant tissues. Here we report preliminary observations to assess the potential application of RA in exploring the dynamics of Pb accumulation at the root tip surface. METHODS AND RESULTS Corn root tips were immersed in Pb solution, stained with RA, and observed microscopically. Pb trapping by border cells was evident within minutes. The role of extracellular DNA was revealed when addition of nucleases resulted in dispersal of RA-stained Pb particles. CONCLUSIONS RA is an efficient tool to monitor Pb-root interactions. Trapping by border cells may control Pb levels and chemistry at the root tip surface. Understanding how plants influence Pb distribution in soil may facilitate its remediation.
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Affiliation(s)
- David A. Huskey
- Department of Soil, Water and Environmental SciencesUniversity of Arizona429 Shantz Building, #38 1177 E. Fourth Street, P.O. Box 210038TucsonArizona85721‐0038USA
| | - Gilberto Curlango‐Rivera
- Department of Soil, Water and Environmental SciencesUniversity of Arizona429 Shantz Building, #38 1177 E. Fourth Street, P.O. Box 210038TucsonArizona85721‐0038USA
| | - Martha C. Hawes
- Department of Soil, Water and Environmental SciencesUniversity of Arizona429 Shantz Building, #38 1177 E. Fourth Street, P.O. Box 210038TucsonArizona85721‐0038USA
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16
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A DNase from a Fungal Phytopathogen Is a Virulence Factor Likely Deployed as Counter Defense against Host-Secreted Extracellular DNA. mBio 2019; 10:mBio.02805-18. [PMID: 30837342 PMCID: PMC6401486 DOI: 10.1128/mbio.02805-18] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
We document that the absence of a single gene encoding a DNase in a fungal plant pathogen results in significantly reduced virulence to a plant host. We compared a wild-type strain of the maize pathogen Cochliobolus heterostrophus and an isogenic mutant lacking a candidate secreted DNase-encoding gene and demonstrated that the mutant is reduced in virulence on leaves and on roots. There are no previous reports of deletion of such a gene from either an animal or plant fungal pathogen accompanied by comparative assays of mutants and wild type for alterations in virulence. We observed DNase activity, in fungal culture filtrates, that is Mg2+ dependent and induced when plant host leaf material is present. Our findings demonstrate not only that fungi use extracellular DNases (exDNases) for virulence, but also that the relevant molecules are deployed in above-ground leaves as well as below-ground plant tissues. Overall, these data provide support for a common defense/counter defense virulence mechanism used by animals, plants, and their fungal and bacterial pathogens and suggest that components of the mechanism might be novel targets for the control of plant disease. Histone-linked extracellular DNA (exDNA) is a component of neutrophil extracellular traps (NETs). NETs have been shown to play a role in immune response to bacteria, fungi, viruses, and protozoan parasites. Mutation of genes encoding group A Streptococcus extracellular DNases (exDNases) results in reduced virulence in animals, a finding that implies that exDNases are deployed as counter defense against host DNA-containing NETs. Is the exDNA/exDNase mechanism also relevant to plants and their pathogens? It has been demonstrated previously that exDNA is a component of a matrix secreted from plant root caps and that plants also carry out an extracellular trapping process. Treatment with DNase I destroys root tip resistance to infection by fungi, the most abundant plant pathogens. We show that the absence of a single gene encoding a candidate exDNase results in significantly reduced virulence of a fungal plant pathogen to its host on leaves, the known infection site, and on roots. Mg2+-dependent exDNase activity was demonstrated in fungal culture filtrates and induced when host leaf material was present. It is speculated that the enzyme functions to degrade plant-secreted DNA, a component of a complex matrix akin to neutrophil extracellular traps of animals.
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17
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Mohanram S, Kumar P. Rhizosphere microbiome: revisiting the synergy of plant-microbe interactions. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01448-9] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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18
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Nagayama T, Nakamura A, Yamaji N, Satoh S, Furukawa J, Iwai H. Changes in the Distribution of Pectin in Root Border Cells Under Aluminum Stress. FRONTIERS IN PLANT SCIENCE 2019; 10:1216. [PMID: 31632431 PMCID: PMC6783878 DOI: 10.3389/fpls.2019.01216] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 09/04/2019] [Indexed: 05/16/2023]
Abstract
Root border cells (RBCs) surround the root apices in most plant species and are involved in the production of root exudates. We tested the relationship between pectin content in root tips and aluminum (Al) tolerance by comparing these parameters in wild-type (WT) and sensitive-to-Al-rhizotoxicity (star1) mutant rice plants. Staining for demethylesterified pectin decreased after Al treatment in the WT. A high level of pectin was observed in RBCs of the root tips. The level of total pectin was increased by about 50% compared with the control. In the Al-sensitive star1 mutant, Al treatment decreased root elongation and pectin content, especially in RBCs. In addition, almost no Al accumulation was observed in the control, whereas more Al was accumulated in the RBCs of STAR1 roots. These results show that the amount of pectin influences Al tolerance; that Al accumulation in rice roots is reduced by the distribution of pectin in root-tip RBCs; and that these reactions occur in the field around the RBCs, including the surrounding mucilage. Al accumulation in rice roots is reduced by the distribution of pectin in root tips, and pectin in the root cell walls contributes to the acquisition of Al tolerance in rice by regulating its distribution. The release of Al-binding mucilage by RBCs could play a role in protecting root tips from Al-induced cellular damage.
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Affiliation(s)
- Teruki Nagayama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Atsuko Nakamura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Naoki Yamaji
- Research Institute for Bioresources, Okayama University, Chuo, Kurashiki, Japan
| | - Shinobu Satoh
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Jun Furukawa
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
- *Correspondence: Jun Furukawa, ; Hiroaki Iwai, iwai.hiroaki.gb.@u.tsukuba.ac.jp
| | - Hiroaki Iwai
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
- *Correspondence: Jun Furukawa, ; Hiroaki Iwai, iwai.hiroaki.gb.@u.tsukuba.ac.jp
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19
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Nagler M, Insam H, Pietramellara G, Ascher-Jenull J. Extracellular DNA in natural environments: features, relevance and applications. Appl Microbiol Biotechnol 2018; 102:6343-6356. [PMID: 29858957 PMCID: PMC6061472 DOI: 10.1007/s00253-018-9120-4] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/15/2018] [Accepted: 05/19/2018] [Indexed: 01/13/2023]
Abstract
Extracellular DNA (exDNA) is abundant in many habitats, including soil, sediments, oceans and freshwater as well as the intercellular milieu of metazoa. For a long time, its origin has been assumed to be mainly lysed cells. Nowadays, research is collecting evidence that exDNA is often secreted actively and is used to perform a number of tasks, thereby offering an attractive target or tool for biotechnological, medical, environmental and general microbiological applications. The present review gives an overview on the main research areas dealing with exDNA, depicts its inherent origins and functions and deduces the potential of existing and emerging exDNA-based applications. Furthermore, it provides an overview on existing extraction methods and indicates common pitfalls that should be avoided whilst working with exDNA.
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Affiliation(s)
- Magdalena Nagler
- Universität Innsbruck, Institute of Microbiology, Technikerstr. 25d, 6020, Innsbruck, Austria.
| | - Heribert Insam
- Universität Innsbruck, Institute of Microbiology, Technikerstr. 25d, 6020, Innsbruck, Austria
| | - Giacomo Pietramellara
- Dipartimento di Scienze delle Produzioni Agroalimentari e dell'Ambiente, Università degli Studi di Firenze, Piazzale delle Cascine 18, 50144, Florence, Italy
| | - Judith Ascher-Jenull
- Universität Innsbruck, Institute of Microbiology, Technikerstr. 25d, 6020, Innsbruck, Austria
- Dipartimento di Scienze delle Produzioni Agroalimentari e dell'Ambiente, Università degli Studi di Firenze, Piazzale delle Cascine 18, 50144, Florence, Italy
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20
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Sasse J, Martinoia E, Northen T. Feed Your Friends: Do Plant Exudates Shape the Root Microbiome? TRENDS IN PLANT SCIENCE 2018; 23:25-41. [PMID: 29050989 DOI: 10.1016/j.tplants.2017.09.003] [Citation(s) in RCA: 764] [Impact Index Per Article: 127.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/25/2017] [Accepted: 09/07/2017] [Indexed: 05/18/2023]
Abstract
Plant health in natural environments depends on interactions with complex and dynamic communities comprising macro- and microorganisms. While many studies have provided insights into the composition of rhizosphere microbiomes (rhizobiomes), little is known about whether plants shape their rhizobiomes. Here, we discuss physiological factors of plants that may govern plant-microbe interactions, focusing on root physiology and the role of root exudates. Given that only a few plant transport proteins are known to be involved in root metabolite export, we suggest novel families putatively involved in this process. Finally, building off of the features discussed in this review, and in analogy to well-known symbioses, we elaborate on a possible sequence of events governing rhizobiome assembly.
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Affiliation(s)
- Joelle Sasse
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Enrico Martinoia
- Department of Plant and Microbial Biology, University of Zurich, Zurich 8008, Switzerland
| | - Trent Northen
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Joint Genome Institute, Walnut Creek, CA 94958, USA.
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21
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Shackira AM, Puthur JT. Enhanced phytostabilization of cadmium by a halophyte-Acanthus ilicifolius L. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2017; 19:319-326. [PMID: 27593613 DOI: 10.1080/15226514.2016.1225284] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Heavy metal pollution in mangrove wetlands has become a growing matter of concern as it serves as sink and source for toxic heavy metals including cadmium (Cd). The present study evaluates the phytostabilization potential of a halophyte, Acanthus ilicifolius L., toward Cd under hydroponic culture conditions. Accumulation, translocation, and effects of Cd on the antioxidant system of A. ilicifolius were studied. Results indicated that A. ilicifolius accumulated Cd mainly in roots (96.4%) as compared to stem (1.4%) and leaves (0.6%) and the accumulated Cd is retained in root rather than being translocated to shoots as indicated by TF < 0.26. Moreover, malondialdehyde (MDA) content increased upon Cd treatment, which is further detoxified by the enzymatic and nonenzymatic antioxidant mechanism. Antioxidants like proline, ascorbate, and amino acid recorded an increased accumulation in the Cd-treated plants followed by the upregulation of antioxidant enzymes like superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (GPX), and ascorbate peroxidase (APX). Therefore, the rate of sugar accumulation was found to be decreased in plants treated with Cd as compared to the control plants. Thus, having relatively high BCFroot (69.3) and low TFshoot (0.26) values, A. ilicifolius can be suggested as a potential candidate for phytostabilization of Cd in mangrove wetlands.
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Affiliation(s)
- A M Shackira
- a Plant Physiology and Biochemistry Division, Department of Botany , University of Calicut , Kerala , India
| | - Jos T Puthur
- a Plant Physiology and Biochemistry Division, Department of Botany , University of Calicut , Kerala , India
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22
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Zaharescu DG, Burghelea CI, Dontsova K, Presler JK, Maier RM, Huxman T, Domanik KJ, Hunt EA, Amistadi MK, Gaddis EE, Palacios-Menendez MA, Vaquera-Ibarra MO, Chorover J. Ecosystem Composition Controls the Fate of Rare Earth Elements during Incipient Soil Genesis. Sci Rep 2017; 7:43208. [PMID: 28230202 PMCID: PMC5322375 DOI: 10.1038/srep43208] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 01/23/2017] [Indexed: 11/08/2022] Open
Abstract
The rare earth elements (REE) are increasingly important in a variety of science and economic fields, including (bio)geosciences, paleoecology, astrobiology, and mining. However, REE distribution in early rock-microbe-plant systems has remained elusive. We tested the hypothesis that REE mass-partitioning during incipient weathering of basalt, rhyolite, granite and schist depends on the activity of microbes, vascular plants (Buffalo grass), and arbuscular mycorrhiza. Pore-water element abundances revealed a rapid transition from abiotic to biotic signatures of weathering, the latter associated with smaller aqueous loss and larger plant uptake. Abiotic dissolution was 39% of total denudation in plant-microbes-mycorrhiza treatment. Microbes incremented denudation, particularly in rhyolite, and this resulted in decreased bioavailable solid pools in this rock. Total mobilization (aqueous + uptake) was ten times greater in planted compared to abiotic treatments, REE masses in plant generally exceeding those in water. Larger plants increased bioavailable solid pools, consistent with enhanced soil genesis. Mycorrhiza generally had a positive effect on total mobilization. The main mechanism behind incipient REE weathering was carbonation enhanced by biotic respiration, the denudation patterns being largely dictated by mineralogy. A consistent biotic signature was observed in La:phosphate and mobilization: solid pool ratios, and in the pattern of denudation and uptake.
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Affiliation(s)
| | | | - Katerina Dontsova
- Biosphere 2, The University of Arizona, Tucson, AZ, USA
- Department of Soil, Water & Environmental Science, The University of Arizona, Tucson, AZ, USA
| | | | - Raina M. Maier
- Department of Soil, Water & Environmental Science, The University of Arizona, Tucson, AZ, USA
| | - Travis Huxman
- School of Biological Sciences, University of California, Irvine, CA, USA
| | - Kenneth J. Domanik
- Lunar and Planetary Laboratory, The University of Arizona, Tucson, AZ, USA
| | | | - Mary K. Amistadi
- Department of Soil, Water & Environmental Science, The University of Arizona, Tucson, AZ, USA
- Arizona Laboratory for Emerging Contaminants, The University of Arizona, Tucson, AZ, USA
| | - Emily E. Gaddis
- Biosphere 2, The University of Arizona, Tucson, AZ, USA
- Williams College, Williamstown, MA, USA
| | | | - Maria O. Vaquera-Ibarra
- Biosphere 2, The University of Arizona, Tucson, AZ, USA
- University of the Americas Puebla, Puebla, México
| | - Jon Chorover
- Biosphere 2, The University of Arizona, Tucson, AZ, USA
- Department of Soil, Water & Environmental Science, The University of Arizona, Tucson, AZ, USA
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23
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Bojórquez-Quintal E, Escalante-Magaña C, Echevarría-Machado I, Martínez-Estévez M. Aluminum, a Friend or Foe of Higher Plants in Acid Soils. FRONTIERS IN PLANT SCIENCE 2017; 8:1767. [PMID: 29075280 PMCID: PMC5643487 DOI: 10.3389/fpls.2017.01767] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 09/27/2017] [Indexed: 05/11/2023]
Abstract
Aluminum (Al) is the most abundant metal in the earth's crust, but its availability depends on soil pH. Despite this abundance, Al is not considered an essential element and so far no experimental evidence has been put forward for a biological role. In plants and other organisms, Al can have a beneficial or toxic effect, depending on factors such as, metal concentration, the chemical form of Al, growth conditions and plant species. Here we review recent advances in the study of Al in plants at physiological, biochemical and molecular levels, focusing mainly on the beneficial effect of Al in plants (stimulation of root growth, increased nutrient uptake, the increase in enzyme activity, and others). In addition, we discuss the possible mechanisms involved in improving the growth of plants cultivated in soils with acid pH, as well as mechanisms of tolerance to the toxic effect of Al.
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Affiliation(s)
- Emanuel Bojórquez-Quintal
- CONACYT-Laboratorio de Análisis y Diagnóstico del Patrimonio, El Colegio de Michoacán, La Piedad, Mexico
| | - Camilo Escalante-Magaña
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Mérida, Mexico
| | - Ileana Echevarría-Machado
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Mérida, Mexico
| | - Manuel Martínez-Estévez
- Unidad de Bioquímica y Biología Molecular de Plantas, Centro de Investigación Científica de Yucatán, Mérida, Mexico
- *Correspondence: Manuel Martínez-Estévez,
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