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Lamichhane JR, Barbetti MJ, Chilvers MI, Pandey AK, Steinberg C. Exploiting root exudates to manage soil-borne disease complexes in a changing climate. Trends Microbiol 2024; 32:27-37. [PMID: 37598008 DOI: 10.1016/j.tim.2023.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 08/21/2023]
Abstract
Ongoing climate change will both profoundly impact land-use (e.g., changes in crop species or cultivar and cropping practices) and abiotic factors (e.g., moisture and temperature), which will in turn alter plant-microorganism interactions in soils, including soil-borne pathogens (i.e., plant pathogenic bacteria, fungi, oomycetes, viruses, and nematodes). These pathogens often cause soil-borne disease complexes, which, due to their complexity, frequently remain undiagnosed and unmanaged, leading to chronic yield and quality losses. Root exudates are a complex group of organic substances released in the rhizosphere with potential to recruit, repel, stimulate, inhibit, or kill other organisms, including the detrimental ones. An improved understanding of how root exudates affect interspecies and/or interkingdom interactions in the rhizosphere under ongoing climate change is a prerequisite to effectively manage plant-associated microbes, including those causing diseases.
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Affiliation(s)
- Jay Ram Lamichhane
- INRAE, Université Fédérale de Toulouse, UMR AGIR, F-31326 Castanet-Tolosan Cedex, France.
| | - Martin J Barbetti
- School of Agriculture and Environment and the UWA Institute of Agriculture, University of Western Australia, Western Australia 6009, Australia
| | - Martin I Chilvers
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA
| | - Abhay K Pandey
- Department of Mycology & Microbiology, Tea Research Association, North Bengal Regional R & D Center, Nagrakata 735225, West Bengal, India
| | - Christian Steinberg
- Agroécologie, INRAE Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, F-21000 Dijon, France
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Wei S, Fang J, Zhang T, Wang J, Cheng Y, Ma J, Xie R, Liu Z, Su E, Ren Y, Zhao X, Zhang X, Lu Z. Dynamic changes of soil microorganisms in rotation farmland at the western foot of the Greater Khingan range. Front Bioeng Biotechnol 2023; 11:1191240. [PMID: 37425359 PMCID: PMC10328388 DOI: 10.3389/fbioe.2023.1191240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 06/09/2023] [Indexed: 07/11/2023] Open
Abstract
Crop rotation and other tillage systems can affect soil microbial communities and functions. Few studies have reported the response of soil spatial microbial communities to rotation under drought stress. Therefore, the purpose of our study was to explore the dynamic changes of the soil space microbial community under different drought stress-rotation patterns. In this study, two water treatments were set up, control W1 (mass water content 25%-28%), and drought W2 (mass water content 9%-12%). Four crop rotation patterns were set in each water content, spring wheat continuous (R1), spring wheat-potato (R2), spring wheat-potato-rape (R3) and spring wheat-rape (R4), for a total of eight treatments (W1R1, W1R2, W1R3, W1R4, W2R1, W2R2, W2R3, W2R4). Endosphere, rhizosphere and bulk soil of spring wheat in each treatment were collected, and root space microbial community data were generated. The soil microbial community changed under different treatments and their relationship with soil factors were analyzed using a co-occurrence network, mantel test, and other methods. The results revealed that the alpha diversity of microorganisms in the rhizosphere and bulk soil did not differ significantly, but it was significantly greater than in the endosphere. The bacteria community structure was more stable, fungi alpha-diversity significant changes (p < 0.05), that were more sensitive to the response of various treatments than bacteria. The co-occurrence network between fungal species was stable under rotation patterns (R2, R3, R4), while the community stability was poor under continuous cropping pattern (R1), and interactions were strengthened. Soil organic matter (SOM), microbial biomass carbon (MBC), and pH value were the most important factors dominating the bacteria community structural changed in the endosphere, rhizosphere, and bulk soil. The dominant factor that affected the fungal community structural changed in the endosphere, rhizosphere, and bulk soil was SOM. Therefore, we conclude that soil microbial community changes under the drought stress-rotation patterns are mainly influenced by soil SOM and microbial biomass content.
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Affiliation(s)
- Shuli Wei
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Jing Fang
- School of Life Science, Inner Mongolia University, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Tianjiao Zhang
- School of Life Science, Inner Mongolia University, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Jianguo Wang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Yuchen Cheng
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Jie Ma
- School of Life Science, Inner Mongolia University, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Rui Xie
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Zhixiong Liu
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Erhu Su
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
| | - Yongfeng Ren
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Xiaoqing Zhao
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Xiangqian Zhang
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
| | - Zhanyuan Lu
- School of Life Science, Inner Mongolia University, Hohhot, China
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, China
- Key Laboratory of Black Soil Protection and Utilization (Hohhot), Ministry of Agriculture and Rural Affairs, Hohhot, China
- Inner Mongolia Key Laboratory of Degradation Farmland Ecological Remediation and Pollution Control, Hohhot, China
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Velloso JA, Campos VP, Terra WC, Barros AF, Pedroso MP, Pedroso LA, Paula LL. Slight induction and strong inhibition of Heterodera glycines hatching by short-chain molecules released by different plant species. J Nematol 2021; 53:e2021-71. [PMID: 34337424 PMCID: PMC8324887 DOI: 10.21307/jofnem-2021-071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Indexed: 11/28/2022] Open
Abstract
New management tools are necessary to reduce the damage caused by the soybean cyst nematode (SCN), Heterodera glycines. Identification of molecules that can stimulate second-stage juveniles (J2) hatching in an environment without food may contribute to that. In in vitro experiments, we evaluate the effect of volatile organic compounds (VOCs) released by soybean (Glycine max), bean (Phaseolus vulgaris), ryegrass (Lolium multiflorum), and alfalfa (Medicago sativa) on H. glycines egg hatching. VOCs released by all plant species significantly (p < 0.05) increased egg hatching. Short-chain molecules released by leaves and roots of soybean and bean increased the hatching up to 71.4%. The analysis of the volatilome done by gas chromatography coupled with mass spectrometry revealed 44 compounds in the plant emissions. Four of them, namely 3-octanol, 1-hexanol, hexanal and linalool were tested individually as hatching inductors. Under concentrations of 200, 600, and 1,000 µg/ml there was no hatching induction of H. glycines J2 by these compounds. On the other hand, in these concentrations, the compounds 3-octanol and 1-hexanol caused hatching reduction with values similar to the commercial nematicide carbofuran (2,3-dihydro-2,2-dimethylbenzofuran-7-yl methyl carbamate). In subsequent tests, the compounds 1-hexanol and 3-octanol showed lethal concentration values required to kill 50% of thenematode population (LC50) of 210 and 228 µg/ml, respectively, in the first experiment and, 230 and 124 µg/mlin the second one. Although we have not identified any molecules acting as hatching factor (HF), here we present a list (44 candidate molecules) that can be explored in future studies to find an efficient HF.
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Affiliation(s)
- Jeanny A. Velloso
- Laboratory of Nematology, Department of Plant Pathology, Universidade Federal de Lavras – UFLA, Lavras, Minas Gerais, Brazil
| | - Vicente P. Campos
- Laboratory of Nematology, Department of Plant Pathology, Universidade Federal de Lavras – UFLA, Lavras, Minas Gerais, Brazil
| | - Willian C. Terra
- Laboratory of Nematology, Department of Plant Pathology, Universidade Federal de Lavras – UFLA, Lavras, Minas Gerais, Brazil
| | - Aline F. Barros
- Laboratory of Nematology, Department of Plant Pathology, Universidade Federal de Lavras – UFLA, Lavras, Minas Gerais, Brazil
| | - Márcio P. Pedroso
- Department of Chemistry, Universidade Federal de Lavras – UFLA, Lavras, Minas Gerais, Brazil
| | - Luma A. Pedroso
- Laboratory of Nematology, Department of Plant Pathology, Universidade Federal de Lavras – UFLA, Lavras, Minas Gerais, Brazil
| | - Letícia L. Paula
- Laboratory of Nematology, Department of Plant Pathology, Universidade Federal de Lavras – UFLA, Lavras, Minas Gerais, Brazil
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