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Zhu X, Jia M, Zi D, Zhou P, Du Y, Wang N, Dai H, Wang G, Bai Y. Biochar regulates the functions of keystone taxa to reduce p-coumaric acid accumulation in soil. Front Microbiol 2024; 15:1458185. [PMID: 39328907 PMCID: PMC11425655 DOI: 10.3389/fmicb.2024.1458185] [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: 07/02/2024] [Accepted: 08/28/2024] [Indexed: 09/28/2024] Open
Abstract
Introduction Applying biochar (BC) to reduce toxic substance accumulation in soil, either through direct adsorption or modulation of the microbial community, has received considerable attention. However, a knowledge gap exists regarding how BC regulates microbial community structure and functions to mitigate toxic substance accumulation. Methods We previously identified p-coumaric acid (p-CA) as a representative autotoxin in tobacco rhizosphere soil. On this basis, this study simulated a soil environment with p-CA accumulation to investigate the impacts of BC on p-CA, soil physicochemical properties, and microbial community structure and function. Results The results showed that p-CA could be directly adsorbed onto BC, which followed the pseudo-second-order kinetic model (R 2 = 0.996). A pot experiment revealed that BC significantly reduced soil p-CA, altered soil microbial composition, and enhanced bacterial community diversity. A weighted correlation network analysis showed a close association between taxon 1 in the microbial network and p-CA, suggesting a pivotal role for this taxon in reducing p-CA, with Devosia and Nocardioides identified as potential key contributors to this process. The prediction of possible keystone taxa functions showed that BC increased the relative abundances of aromatic compound degraders. Mantel tests indicated that soil organic matter exerted the greatest influence on keystone taxa functions and hub genera. Discussion These findings suggest that BC may either directly chemisorb p-CA or indirectly facilitate p-CA degradation by regulating the functioning of keystone taxa. The results of this study provide a novel perspective for further investigation of the mechanisms through which BC reduces the accumulation of toxic substances in soil.
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Affiliation(s)
- Xuanquan Zhu
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
| | - Meng Jia
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
| | - Dingchun Zi
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
| | - Peng Zhou
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
| | - Yu Du
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
| | - Na Wang
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
| | - Huijuan Dai
- China Tobacco Hebei Industrial Co., Ltd., Shijiazhuang, China
| | - Ge Wang
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
| | - Yuxiang Bai
- College of Tobacco Science, Yunnan Agricultural University, Kunming, China
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Hu H, Meng J, Zheng H, Cai H, Wang M, Luo Z, E Y, Li C, Wu Q, Yan Z, Lei Y. Relief effect of biochar on continuous cropping of tobacco through the reduction of p-hydroxybenzoic acid in soil. Heliyon 2024; 10:e33011. [PMID: 38994090 PMCID: PMC11238006 DOI: 10.1016/j.heliyon.2024.e33011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 06/12/2024] [Accepted: 06/12/2024] [Indexed: 07/13/2024] Open
Abstract
Biochar application to soil has proven to be an excellent approach for decreasing the concentration of auto-toxic compounds and promoting plant growth in continuous-cropping fields. However, the mechanisms underlying the action pathway among biochars, auto-toxic compounds and tobacco remain unknown. In this study, we conducted an experiment tracking the incidence rate of black rot and auto-toxic compounds for a 3-year continuous-cropping tobacco pot trial in response to biochar treatment intensity compared with that of non-biochar treatment. Biochar inhibited the incidence of black rot. Using ultra-high-performance liquid chromatography-mass spectrometry (UPLC‒MS/MS), we revealed that biochar can effectively decrease the concentration of p-hydroxybenzoic acid (PHA), which is associated with the incidence rate of black rot (R2 = 0.890, p < 0.05). The sorption kinetics and isotherm of PHA sorption on biochar indicate that the coexistence of heterogeneous and monolayer sorption plays an important role in the adsorption process. Using Molecular dynamics (MD), Density functional theory (DFT) and Independent gradient model (IGM) analyses, we provide evidence that van der Waals force (vdW), π-π bonds and H-bonds between biochar and PHAs are the dominant factors that affect adsorption capacity. Moreover, the molecular adsorption rate (Nbiochar: NPHAs = 1:4) was theoretically calculated. In contrast, biochar dramatically increased nutrient retention capacity and improved soil properties, further enhancing tobacco quality, including its agronomic and physiological traits. Therefore, we considered that biochar not only relieved continuous cropping but also improved soil properties suitable for tobacco growth. Together, we demonstrate that the action of biochar in continuously cropped soil improves soil traits and alleviates auto-toxic compound toxicity. These data contribute to the direction of modified biochar application to improve continuous-cropping soil.
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Affiliation(s)
- Haijun Hu
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
- Zunyi Normal College, Zunyi, 863002, PR China
| | - Jun Meng
- National Biochar Institute of Shenyang Agricultural University, Shenyang, 110866, PR China
| | - Huan Zheng
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
| | - Heqing Cai
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
| | - Maoxian Wang
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
| | - Zhenbao Luo
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
| | - Yang E
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
- National Biochar Institute of Shenyang Agricultural University, Shenyang, 110866, PR China
| | - Caibin Li
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
| | - Qiaoxue Wu
- Bijie Tobacco Company of Guizhou Province, Bijie, Guizhou, 551700, PR China
| | - Zhiqiang Yan
- Guizhou Rice Research Institute, Guiyang, 550016, PR China
| | - Yue Lei
- Guizhou Rice Research Institute, Guiyang, 550016, PR China
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Shen M, Wu L, Zhang Y, You R, Xiao J, Kang Y. Leaf litter from Cynanchum auriculatum Royle ex Wight leads to root rot outbreaks by Fusarium solani, hindering continuous cropping. FEMS Microbiol Ecol 2024; 100:fiae068. [PMID: 38684466 PMCID: PMC11099666 DOI: 10.1093/femsec/fiae068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/18/2024] [Accepted: 04/25/2024] [Indexed: 05/02/2024] Open
Abstract
Cynanchum auriculatum Royle ex Wight (CA) is experiencing challenges with continuous cropping obstacle (CCO) due to soil-borne fungal pathogens. The leaf litter from CA is regularly incorporated into the soil after root harvesting, but the impact of this practice on pathogen outbreaks remains uncertain. In this study, a fungal strain D1, identified as Fusarium solani, was isolated and confirmed as a potential factor in CCO. Both leave extract (LE) and root extract (RE) were found to inhibit seed germination and the activities of plant defense-related enzymes. The combinations of extracts and D1 exacerbated these negative effects. Beyond promoting the proliferation of D1 in soil, the extracts also enhanced the hypha weight, spore number, and spore germination rate of D1. Compared to RE, LE exhibited a greater degree of promotion in the activities of pathogenesis-related enzymes in D1. Additionally, caffeic acid and ferulic acid were identified as potential active compounds. LE, particularly in combination with D1, induced a shift in the composition of fungal communities rather than bacterial communities. These findings indicate that the water extract of leaf litter stimulated the growth and proliferation of fungal strain D1, thereby augmenting its pathogenicity toward CA and ultimately contributing to the CCO process.
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Affiliation(s)
- Min Shen
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui, 241000, China
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Yancheng Teachers University, Yancheng, Jiangsu, 224007, China
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng, 224007, China
| | - Limeng Wu
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Yancheng Teachers University, Yancheng, Jiangsu, 224007, China
| | - Yanzhou Zhang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Yancheng Teachers University, Yancheng, Jiangsu, 224007, China
| | - Ruiqiang You
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Yancheng Teachers University, Yancheng, Jiangsu, 224007, China
| | - Jiaxin Xiao
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui, 241000, China
| | - Yijun Kang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Yancheng Teachers University, Yancheng, Jiangsu, 224007, China
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng, 224007, China
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Zhong S, Guo C, Su L, Jiang H, Wang XE, Shi L, Li X, Liao X, Xue J. Physiological and transcriptomic analyses provide preliminary insights into the autotoxicity of Lilium brownii. FRONTIERS IN PLANT SCIENCE 2024; 15:1330061. [PMID: 38807780 PMCID: PMC11130447 DOI: 10.3389/fpls.2024.1330061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 04/24/2024] [Indexed: 05/30/2024]
Abstract
Lilium brownii F. E. Brown ex Miellez var. viridulum Baker (Longya lily) is a variety of Lilium brownii F.E. Br. ex Miellez. We used HS-SPME and GC-MS to screened the tissues of L. brownii roots, stems, bulbs, and leaves and obtained 2,4-DTBP as an autotoxic substance for subsequent analysis. 2,4-DTBP was highly autotoxic in some treatment groups. Based on changes in physiological indicators, we carried out transcriptomic analysis to investigate the mechanisms of autotoxicity of substances on L. brownii and obtained 188,505 Unigenes. GO and KEGG enrichment analyses showed that L. brownii responded differently to different concentrations and treatment times of 2,4-DTBP. We observed significant changes in genes associated with ROS, phytohormones, and MAPK signaling cascades. 2,4-DTBP affects chloroplasts, the integrity of the respiratory electron transport chain, and ribosomes, causing L. brownii autotoxicity. Our findings provide a practical genomic resource for future research on L. brownii autotoxicity and evidence for the mechanism of action of autotoxic substances.
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Affiliation(s)
| | | | | | | | | | | | - Xiaogang Li
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Xiaolan Liao
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Jin Xue
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, College of Plant Protection, Hunan Agricultural University, Changsha, China
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Jia J, Hu G, Ni G, Xie M, Li R, Wang G, Zhang J. Bacteria drive soil multifunctionality while fungi are effective only at low pathogen abundance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167596. [PMID: 37802347 DOI: 10.1016/j.scitotenv.2023.167596] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 09/21/2023] [Accepted: 10/03/2023] [Indexed: 10/08/2023]
Abstract
The positive correlation between soil biodiversity and multifunctionality has gained widespread recognition. However, the impact of plant pathogens on soil multifunctionality and its relationship with microbial diversity remains understudied. To address this knowledge gap, we collected soil samples from three Hami melon (Cucumis melo L.) planting sites with varying monoculture durations (1, 3, and 5 years). We sequenced the bacterial and fungal communities in these samples and quantified multifunctionality. The results revealed a significant increase in the relative abundance of fungal pathogens over the years of planting, which influenced the correlations between microbial diversity and multifunctionality at a threshold value of 0.01. Both bacterial and fungal richness positively influenced multifunctionality when fungal pathogen abundance was low (< 0.01), whereas only bacterial richness showed a positive correlation with multifunctionality under high fungal pathogen abundance (> 0.01) conditions. Both bacterial and fungal communities were primarily governed by deterministic processes. However, only bacterial community assembly drove soil multifunctionality, showing positive correlations with multifunctionality dissimilarity under low fungal pathogen abundance condition and negative correlations under high fungal pathogen abundance condition, reflecting distinct pathogen pressures. Structural equaling modeling further confirmed the distinct roles of bacterial and fungal richness and composition in promoting multifunctionality under different fungal pathogen condition. Our findings provide evidence that shifts in fungal pathogen abundance alter the balance and interactions between biodiversity and multifunctionality and highlight the importance of engineering biotic interactions in determining soil functioning in agroecosystems.
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Affiliation(s)
- Jiyu Jia
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China; Department of Soil Quality, Wageningen University & Research, P.O. Box 47, 6700AA Wageningen, the Netherlands
| | - Guozhi Hu
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China; Hami Melon Research Center, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
| | - Gang Ni
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China
| | - Muxi Xie
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China
| | - Ruipeng Li
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China
| | - Guangzhou Wang
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.
| | - Junling Zhang
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China
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Sui J, Li C, Wang Y, Li X, Liu R, Hua X, Liu X, Qi H. Microecological Shifts in the Rhizosphere of Perennial Large Trees and Seedlings in Continuous Cropping of Poplar. Microorganisms 2023; 12:58. [PMID: 38257884 PMCID: PMC10820384 DOI: 10.3390/microorganisms12010058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/25/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024] Open
Abstract
The cultivation of poplar trees is hindered by persistent cropping challenges, resulting in reduced wood productivity and increased susceptibility to soil-borne diseases. These issues primarily arise from alterations in microbial structure and the infiltration of pathogenic fungi. To investigate the impact on soil fertility, we conducted an analysis using soil samples from both perennial poplar trees and three successive generations of continuously cropped poplar trees. The quantity and community composition of bacteria and fungi in the rhizosphere were assessed using the Illumina MiSeq platform. The objective of this study is to elucidate the impact of continuous cropping challenges on soil fertility and rhizosphere microorganisms in poplar trees, thereby establishing a theoretical foundation for investigating the mechanisms underlying these challenges. The study found that the total bacteria in the BT group is 0.42 times higher than the CK group, and the total fungi is 0.33 times lower than the CK group. The BT and CK groups presented relatively similar bacterial richness and diversity, while the indices showed a significant (p < 0.05) higher fungal richness and diversity in the CK group. The fractions of Bacillus were 2.22% and 2.41% in the BT and CK groups, respectively. There was a 35.29% fraction of Inocybe in the BT group, whereas this was barely observed in the CK group. The fractions of Geopora were 26.25% and 5.99%, respectively in the BT and CK groups. Modifying the microbial community structure in soil subjected to continuous cropping is deemed as the most effective approach to mitigate the challenges associated with this agricultural practice.
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Affiliation(s)
- Junkang Sui
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Chenyu Li
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Yinping Wang
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Xiangyu Li
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Rui Liu
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Xuewen Hua
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
| | - Xunli Liu
- College of Forestry, Shandong Agricultural University, Tai’an 271000, China;
| | - Hui Qi
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252000, China; (C.L.); (Y.W.); (X.L.); (R.L.); (X.H.)
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