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Hata S, Tsuda R, Kojima S, Tanaka A, Kouchi H. Both incompatible and compatible rhizobia inhabit the intercellular spaces of leguminous root nodules. Plant Signal Behav 2023; 18:2245995. [PMID: 37573516 PMCID: PMC10424618 DOI: 10.1080/15592324.2023.2245995] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 08/15/2023]
Abstract
In addition to rhizobia, many types of co-existent bacteria are found in leguminous root nodules, but their habitats are unclear. To investigate this phenomenon, we labeled Bradyrhizobium diazoefficiens USDA122 and Bradyrhizobium sp. SSBR45 with Discosoma sp. red fluorescent protein (DsRed) or enhanced green fluorescent protein (eGFP). USDA122 enhances soybean growth by forming effective root nodules, but SSBR45 does not form any nodules. Using low-magnification laser scanning confocal microscopy, we found that infected cells in the central zone of soybean nodules appeared to be occupied by USDA122. Notably, high-magnification microscopy after co-inoculation of non-fluorescent USDA122 and fluorescence-labeled SSBR45 also revealed that SSBR45 inhabits the intercellular spaces of healthy nodules. More unexpectedly, co-inoculation of eGFP-labeled USDA122 and DsRed-labeled SSBR45 (and vice versa) revealed the presence of USDA122 bacteria in both the symbiosomes of infected cells and in the apoplasts of healthy nodules. We then next inspected nodules formed after a mixed inoculation of differently-labeled USDA122, without SSBR45, and confirmed the inhabitation of the both populations of USDA122 in the intercellular spaces. In contrast, infected cells were occupied by single-labeled USDA122. We also observed Mesorhizobium loti in the intercellular spaces of active wild-type nodules of Lotus japonicus using transmission electron microscopy. Compatible intercellular rhizobia have been described during nodule formation of several legume species and in some mutants, but our evidence suggests that this type of colonization may occur much more commonly in leguminous root nodules.
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Affiliation(s)
- Shingo Hata
- Faculty of Agriculture, Ryukoku University, Otsu, Japan
| | - Risa Tsuda
- Faculty of Agriculture, Ryukoku University, Otsu, Japan
| | - Serina Kojima
- Faculty of Agriculture, Ryukoku University, Otsu, Japan
| | - Aiko Tanaka
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Hiroshi Kouchi
- Division of Arts and Sciences, International Christian University, Mitaka, Japan
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2
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Kharnaior P, Tamang JP. Microbiome and metabolome in home-made fermented soybean foods of India revealed by metagenome-assembled genomes and metabolomics. Int J Food Microbiol 2023; 407:110417. [PMID: 37774634 DOI: 10.1016/j.ijfoodmicro.2023.110417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/10/2023] [Accepted: 09/22/2023] [Indexed: 10/01/2023]
Abstract
Grep-chhurpi, peha, peron namsing and peruñyaan are lesser-known home-made fermented soybean foods prepared by the native people of Arunachal Pradesh in India. Present work aims to study the microbiome, their functional annotations, metabolites and recovery of metagenome-assembled genomes (MAGs) in these four fermented soybean foods. Metagenomes revealed the dominance of bacteria (97.80 %) with minor traces of viruses, eukaryotes and archaea. Bacillota is the most abundant phylum with Bacillus subtilis as the abundant species. Metagenome also revealed the abundance of lactic acid bacteria such as Enterococcus casseliflavus, Enterococcus faecium, Mammaliicoccus sciuri and Staphylococcus saprophyticus in all samples. B. subtilis was the major species found in all products. Predictive metabolic pathways showed the abundance of genes associated with metabolisms. Metabolomics analysis revealed both targeted and untargeted metabolites, which suggested their role in flavour development and therapeutic properties. High-quality MAGs, identified as B. subtilis, Enterococcus faecalis, Pediococcus acidilactici and B. velezensis, showed the presence of several biomarkers corresponding to various bio-functional properties. Gene clusters of secondary metabolites (antimicrobial peptides) and CRISPR-Cas systems were detected in all MAGs. This present work also provides key elements related to the cultivability of identified species of MAGs for future use as starter cultures in fermented soybean food product development. Additionally, comparison of microbiome and metabolites of grep-chhurpi, peron namsing and peruñyaan with that of other fermented soybean foods of Asia revealed a distinct difference.
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Affiliation(s)
- Pynhunlang Kharnaior
- Department of Microbiology, Sikkim University, Science Building, Tadong 737102, Gangtok, Sikkim, India
| | - Jyoti Prakash Tamang
- Department of Microbiology, Sikkim University, Science Building, Tadong 737102, Gangtok, Sikkim, India.
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3
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Yang Z, Kang J, Ye Z, Qiu W, Liu J, Cao X, Ge J, Ping W. Synergistic benefits of Funneliformis mosseae and Bacillus paramycoides: Enhancing soil health and soybean tolerance to root rot disease. Environ Res 2023; 238:117219. [PMID: 37778608 DOI: 10.1016/j.envres.2023.117219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/10/2023] [Accepted: 09/11/2023] [Indexed: 10/03/2023]
Abstract
To explore the response of soil metabolite composition to soybean disease, the effect of the combined inoculation of arbuscular mycorrhizal fungi (AMF) and plant growth-promoting bacteria on soybean root rot caused by Fusarium oxysporum was studied. A factorial completely randomized design with three factors (AMF, Bacillus. paramycoides, and rot disease stress) was conducted, and eight treatments, including normal groups and stress groups, were performed using pot experiments. GC‒MS and enzymatic assays were used to evaluate the soil factors and soybean growth indicators. The results showed that there were significant differences in the composition of metabolites among the different treatment groups, and 23 metabolites were significantly related to soybean biomass. The combined inoculation of Funneliformis mosseae and Bacillus paramycoides resulted in a significant reduction in harmful soil metabolites associated with root rot disease, such as ethylbenzene and styrene. This reduction in metabolites contributed to improving soil health, as evidenced by enhanced soybean defence enzyme activities and microbial activity, and β-1,3-glucanase, chitinase and phenylalanine ammonia-lyase activities were improved to alleviate plant rhizosphere stress. Furthermore, soybean plants inoculated with the synergistic treatments exhibited reduced root rot disease severity and improved growth indicators compared to control plants. Plant height, root dry weight (RDW), and shoot and root fresh weight (SRFW) were improved by 4.18-53.79%, and the AM fungal colonization rate was also improved under stress. The synergistic application of Funneliformis mosseae and Bacillus paramycoides can effectively enhance soil health by inhibiting the production of harmful soil metabolites and improving soybean tolerance to root rot disease. This approach holds promise for the sustainable management of soil-borne diseases in soybean cultivation.
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Affiliation(s)
- Zhichao Yang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Jie Kang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Zeming Ye
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Wei Qiu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Jiaxin Liu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Xinbo Cao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China; Hebei University of Environmental Engineering, Hebei Key Laboratory of Agroecological Safety, Qinhuangdao, 066102, China.
| | - Wenxiang Ping
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China; Hebei University of Environmental Engineering, Hebei Key Laboratory of Agroecological Safety, Qinhuangdao, 066102, China.
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4
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Sanzovo AWS, Silvestre DA, Goes KCGP, Volsi B, Constantino LV, Bordin I, Telles TS, Andrade DS. Crop rotation and inoculation increase soil bradyrhizobia population, soybean grain yields, and profitability. Braz J Microbiol 2023; 54:3187-3200. [PMID: 37857777 PMCID: PMC10689658 DOI: 10.1007/s42770-023-01148-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 10/05/2023] [Indexed: 10/21/2023] Open
Abstract
Crop rotation and rhizobial inoculation are strategies to increase yield by means of organic matter addition and modulation of microbial diversity. However, the extent to which these agricultural practices change soil Bradyrhizobium populations, soybean grain yield, and economic benefits to farmers is unclear. Thus, this study aimed to evaluate the interaction between crop rotation and inoculation of soybean (Glycine max) cultivated in two contrasting soils (clayey and sandy soil) on biological nitrogen fixation components, grain yields, and profits. Field experiments with a three-year crop rotation system were carried out to compare effects of inoculation and crop rotations on soil chemical attributes, bradyrhizobia most probable number (MPN) and diversity, soybean nodulation, grain yield, and economic indicators of inoculation in different crop rotations. The crop rotation did not affect the soil MPN cells of bradyrhizobia, but the inoculation and the soil sampling time did, ranging from 3.61-4.42 to 4.40-4.82 in the sandy soil, while in the clayey soil they were from 5.19-6.34 to 6.61-7.14 in Log10 per g of soil with higher population after harvest of summer crops. In the clayey soil, crop rotation influenced soybean nodulation. The grain yield of inoculated soybean in the clayey soil was higher than that in the sandy soil. Soybean inoculation with Bradyrhizobium spp. increased the profitability of agricultural production systems by up to 45% in clayey soil and up to 7% in sandy soil.
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Affiliation(s)
- Alisson Wilson Santos Sanzovo
- Instituto de Desenvolvimento Rural do Paraná-IAPAR-EMATER, Rodovia Celso Garcia Cid, Km 375, 86047-902, Londrina, Paraná, Brazil
| | - Danilo Augusto Silvestre
- Instituto de Desenvolvimento Rural do Paraná-IAPAR-EMATER, Rodovia Celso Garcia Cid, Km 375, 86047-902, Londrina, Paraná, Brazil
- Departamento de Agronomia, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | | | - Bruno Volsi
- Instituto de Desenvolvimento Rural do Paraná-IAPAR-EMATER, Rodovia Celso Garcia Cid, Km 375, 86047-902, Londrina, Paraná, Brazil
- Departamento de Agronomia, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | | | - Ivan Bordin
- Instituto de Desenvolvimento Rural do Paraná-IAPAR-EMATER, Rodovia Celso Garcia Cid, Km 375, 86047-902, Londrina, Paraná, Brazil
| | - Tiago Santos Telles
- Instituto de Desenvolvimento Rural do Paraná-IAPAR-EMATER, Rodovia Celso Garcia Cid, Km 375, 86047-902, Londrina, Paraná, Brazil
- Departamento de Agronomia, Universidade Estadual de Londrina (UEL), Londrina, Brazil
| | - Diva Souza Andrade
- Instituto de Desenvolvimento Rural do Paraná-IAPAR-EMATER, Rodovia Celso Garcia Cid, Km 375, 86047-902, Londrina, Paraná, Brazil.
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5
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Uchimiya M, DeRito CM, Hay AG. Sugarcane mill mud-induced putative host (soybean (Glycine max))-rhizobia symbiosis in sandy loam soil. PLoS One 2023; 18:e0293317. [PMID: 37917645 PMCID: PMC10621829 DOI: 10.1371/journal.pone.0293317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/09/2023] [Indexed: 11/04/2023] Open
Abstract
Domestic production of controlled-release, compost-based, and microbe-enhanced fertilizers is being expanded in the U.S. as a part of rural development. Sugarcane mill mud is a sterilized (≈90°C) agricultural byproduct in surplus that has received interests as a soil amendment in several Southern states, because of its high phosphorus and organic carbon contents. Addition of mill mud to sandy loam significantly increased the nodule formation compared to fertilized and unfertilized controls. Mill mud addition also resulted in pod yields similar to the fertilized control. Though not found in mill mud itself, mill mud additions correlated with an increase in soil Rhizobia as determined by deep 16S rRNA gene sequencing. We hypothesize that Firmicutes in sterilized mill mud induced Rhizobia that in turn enhanced soybean (Glycine max) growth. Collectively, mill mud enhanced the plant growth promoting bacteria when applied to a silt loam, although the relative influence of mill mud-derived bacteria, organic carbon, and nutrients is yet to be determined.
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Affiliation(s)
- Minori Uchimiya
- Southern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, New Orleans, Louisiana, United States of America
| | - Christopher M. DeRito
- Department of Microbiology, Cornell University, Ithaca, New York, United States of America
| | - Anthony G. Hay
- Department of Microbiology, Cornell University, Ithaca, New York, United States of America
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6
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Wang S, Zheng L, Gao A, Xiao Y, Han Z, Pan H, Zhang H. Antifungal activity of Klebsiella grimontii DR11 against Fusarium oxysporum causing soybean root rot. J Appl Microbiol 2023; 134:lxad245. [PMID: 37884449 DOI: 10.1093/jambio/lxad245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/01/2023] [Accepted: 10/25/2023] [Indexed: 10/28/2023]
Abstract
AIMS Soybean root rot, caused by Fusarium oxysporum, leads to significant economic and financial losses to the soybean processing industry globally. In the study, we aimed to explore a biocontrol agent to combat F. oxysporum infection in soybean. METHODS AND RESULTS From soybean rhizosphere soil, 48 strains were isolated. Among them, the strain DR11 exhibited the highest inhibition rate of 72.27%. Morphological, physiological, biochemical, and 16S rDNA identification revealed that the strain DR11 was Klebsiella grimontii DR11. Strain DR11 could inhibit the growth of F. oxysporum and spore formation and alter the mycelial morphology. At 5.0 × 106 CFU mL-1, pH 7, and 30°C, it exhibited the highest inhibitory rate (72.27%). Moreover, it could decrease the activity of cell-wall-degrading enzymes of F. oxysporum. Simultaneously, the activities of defense-related enzymes and content of malondialdehyde in soybean plants were increased after treatment with strain DR11. In addition, strain DR11 could form aggregates to form biofilm and adsorb on the surface of soybean roots. It inhibited F. oxysporum growth on soybean seedlings, with an inhibitory effect of 62.71%. CONCLUSION Klebsiella grimontii DR11 had a strong inhibitory effect on F. oxysporum and could be used as a biocontrol agent to combat F. oxysporum infection in soybean.
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Affiliation(s)
- Shengyi Wang
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Lining Zheng
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Ao Gao
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Yufeng Xiao
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Zhe Han
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
| | - Hongyu Pan
- College of Plant Sciences, Jilin University, Changchun 130062, P. R. China
| | - Hao Zhang
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, P. R. China
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7
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Bharti A, Maheshwari HS, Garg S, Anwar K, Pareek A, Satpute G, Prakash A, Sharma MP. Exploring potential soybean bradyrhizobia from high trehalose-accumulating soybean genotypes for improved symbiotic effectiveness in soybean. Int Microbiol 2023; 26:973-987. [PMID: 37036547 DOI: 10.1007/s10123-023-00351-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 03/20/2023] [Accepted: 03/25/2023] [Indexed: 04/11/2023]
Abstract
Drought is the most important factor limiting the activity of rhizobia during N-fixation and plant growth. In the present study, we isolated Bradyrhizobium spp. from root nodules of higher trehalose-accumulating soybean genotypes and examined for moisture stress tolerance on a gradient of polyethylene glycol (PEG 6000) amended in yeast extract mannitol (YEM) broth. In addition, the bradyrhizobial strains were also evaluated for symbiotic effectiveness on soybean. Based on 16S rDNA gene sequences, four bradyrhizobial species were recovered from high trehalose-accumulating genotypes, i.e., two Bradyrhizobium liaoningense strains (accession number KX230053, KX230054) from EC 538828 and PK-472, respectively, one Bradyrhizobium daqingense (accession number KX230052) from PK-472, and one Bradyrhizobium kavangense (accession number MN197775) from Valder genotype having low trehalose. These strains, along with two native strains, viz., Bradyrhizobium japonicum (JF792425), Bradyrhizobium liaoningense (JF792426), and one commercial rhizobium, were studied for nodulation, leghaemoglobin, and N-fixation abilities on soybean under sterilized sand microcosm conditions in a completely randomized design. Among all the strains, D-4A (B. daqingense) followed by D-4B (B. liaoningense) was found to have significantly higher nodulation traits and acetylene reduction assay (ARA) activity when compared to other strains and commercial rhizobia. The bradyrhizobia isolates showed plant growth promotion traits such as indole acetic acid (IAA), exopolysaccharide (EPS), and siderophore production, phosphate-solubilizing potential, and proline accumulation. The novel species B. daqingense was reported for the first time from Indian soil and observed to be a potential candidate strain and should be evaluated for conferring drought tolerance in soybean under simulated stress conditions.
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Affiliation(s)
- Abhishek Bharti
- ICAR-Indian Institute of Soybean Research, Khandwa Road, Indore, 452001, India
- Department of Microbiology, Barkatullah University, Bhopal, 462026, India
| | - Hemant S Maheshwari
- ICAR-Indian Institute of Soybean Research, Khandwa Road, Indore, 452001, India
| | - Shivani Garg
- ICAR-Indian Institute of Soybean Research, Khandwa Road, Indore, 452001, India
| | - Khalid Anwar
- Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Ashwani Pareek
- Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
- National Agri-Food Biotechnology Institute (NABI), Mohali, 140308, Punjab, India
| | - Gyanesh Satpute
- ICAR-Indian Institute of Soybean Research, Khandwa Road, Indore, 452001, India
| | - Anil Prakash
- Department of Microbiology, Barkatullah University, Bhopal, 462026, India
| | - Mahaveer P Sharma
- ICAR-Indian Institute of Soybean Research, Khandwa Road, Indore, 452001, India.
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Win KT, Wasai-Hara S, Tanaka F, Oo AZ, Minamisawa K, Shimoda Y, Imaizumi-Anraku H. Synergistic N 2-fixation and salt stress mitigation in soybean through dual inoculation of ACC deaminase-producing Pseudomonas and Bradyrhizobium. Sci Rep 2023; 13:17050. [PMID: 37816850 PMCID: PMC10564950 DOI: 10.1038/s41598-023-43891-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/29/2023] [Indexed: 10/12/2023] Open
Abstract
We investigated the potential dual application of two Bradyrhizobium strains (B. diazoefficiens USDA110 and B. ottawaense SG09) and plant growth-promoting bacteria, PGPB (Pseudomonas spp.: OFT2 and OFT5), to improve nodulation and N2-fixation in soybean plants. The growth-promoting effects of dual inoculation were observed on plant growth, physiology, and nodulation of soybean under normal conditions compared with plants individually inoculated with either USDA110 or SG09. Both OFT2 and OFT5 promoted N2-fixation by 11% and 56%, respectively, when dual inoculation with USDA110 and by 76% and 81%, respectively, when dual inoculation with SG09. Salinity stress significantly reduces soybean growth, physiology, nutrient uptake, nodulation, and N2-fixation. However, these adverse effects were attenuated by the dual inoculation of PGPB and rhizobia depending on the combination of inoculants. In particular, dual inoculation of PGPB with SG09 was more effective in enhancing the salt tolerance of soybean by reducing salt-induced ethylene production and improving nutrient uptake. However, no such effect was observed with the combined inoculation of USDA110 and OFT5. An effective symbiotic association between SG09 and two Pseudomonas bacteria can be considered a beneficial approach to improving the symbiotic efficiency of nodulation and mitigating salinity stress in soybeans.
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Affiliation(s)
- Khin Thuzar Win
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.
| | - Sawa Wasai-Hara
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Fukuyo Tanaka
- Research Center for Advanced Analysis, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Aung Zaw Oo
- Japan International Research Center for Agricultural Sciences, Tsukuba, Ibaraki, Japan
| | - Kiwamu Minamisawa
- Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Yoshikazu Shimoda
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Haruko Imaizumi-Anraku
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.
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9
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Jiang YH, Liu T, Shi XC, Herrera-Balandrano DD, Xu MT, Wang SY, Laborda P. p-Aminobenzoic acid inhibits the growth of soybean pathogen Xanthomonas axonopodis pv. glycines by altering outer membrane integrity. Pest Manag Sci 2023; 79:4083-4093. [PMID: 37291956 DOI: 10.1002/ps.7608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 06/10/2023]
Abstract
BACKGROUND p-Aminobenzoic acid (pABA) is an environmentally friendly bioactive metabolite synthesized by Lysobacter antibioticus. This compound showed an unusual antifungal mode of action based on cytokinesis inhibition. However, the potential antibacterial properties of pABA remain unexplored. RESULTS In this study, pABA showed antibacterial activity against Gram-negative bacteria. This metabolite inhibited growth (EC50 = 4.02 mM), and reduced swimming motility, extracellular protease activity, and biofilm formation in the soybean pathogen Xanthomonas axonopodis pv. glycines (Xag). Although pABA was previously reported to inhibit fungal cell division, no apparent effect was observed on Xag cell division genes. Instead, pABA reduced the expression of various membrane integrity-related genes, such as cirA, czcA, czcB, emrE, and tolC. Consistently, scanning electron microscopy observations revealed that pABA caused major alternations in Xag morphology and blocked the formation of bacterial consortiums. In addition, pABA reduced the content and profile of outer membrane proteins and lipopolysaccharides in Xag, which may explain the observed effects. Preventive and curative applications of 10 mM pABA reduced Xag symptoms in soybean plants by 52.1% and 75.2%, respectively. CONCLUSIONS The antibacterial properties of pABA were studied for the first time, revealing new insights into its potential application for the management of bacterial pathogens. Although pABA was previously reported to show an antifungal mode of action based on cytokinesis inhibition, this compound inhibited Xag growth by altering the outer membrane's integrity. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yong-Hui Jiang
- School of Life Sciences, Nantong University, Nantong, China
| | - Ting Liu
- School of Life Sciences, Nantong University, Nantong, China
| | - Xin-Chi Shi
- School of Life Sciences, Nantong University, Nantong, China
| | | | - Mei-Ting Xu
- School of Life Sciences, Nantong University, Nantong, China
| | - Su-Yan Wang
- School of Life Sciences, Nantong University, Nantong, China
| | - Pedro Laborda
- School of Life Sciences, Nantong University, Nantong, China
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10
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Shi N, Qiu D, Chen F, Yang YQ, Du Y. Analysis of the Difenoconazole-Resistance Risk and Its Molecular Basis in Colletotrichum truncatum from Soybean. Plant Dis 2023; 107:3123-3130. [PMID: 37172974 DOI: 10.1094/pdis-12-22-2983-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Anthracnose disease, caused by Colletotrichum truncatum, is a destructive fungal disease in soybean worldwide, and some demethylation inhibitor fungicides are used to manage it. In this study, the sensitivity of C. truncatum to difenoconazole was determined, and the risk for resistance development of C. truncatum to difenoconazole was also assessed. The results showed that the mean EC50 value was 0.9313 μg/ml, and the frequency of sensitivity formed a unimodal distribution. Six stable mutants with a mutation frequency of 8.33 × 10-5 were generated, and resistance factors ranged from 3.00 to 5.81 after 10 successive culture transfers. All mutants exhibited fitness penalties in reduced mycelial growth rate, sporulation, and pathogenicity, except for the Ct2-3-5 mutant. Positive cross-resistance was observed between difenoconazole and propiconazole but not between difenoconazole and prochloraz, pyraclostrobin, or fluazinam. One point mutation I463V in CYP51A was found in five resistant mutants. Surprisingly, the homologous I463V mutation has not been observed in other plant pathogens. CYP51A and CYP51B expression increased slightly in the resistant mutants as compared to wild-types when exposed to difenoconazole but not in the CtR61-2-3f and CtR61-2-4a mutants. In general, a new point mutation, I463V in CYP51A, could be associated with low resistance to difenoconazole in C. truncatum. In the greenhouse assay, control efficacy of difenoconazole on both parental isolates and the mutants increased in a dose-dependent manner. Collectively, the resistance risk of C. truncatum to difenoconazole is regarded to be low to moderate, suggesting that difenoconazole can still be reasonably used to control soybean anthracnose.
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Affiliation(s)
- Niuniu Shi
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou, Fujian 350013, China
| | - Dezhu Qiu
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350013, China
| | - Furu Chen
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou, Fujian 350013, China
| | - Ying-Qing Yang
- Institute of Plant Protection, Jiangxi Academy of Agricultural Sciences, Nanchang, Jiangxi 330000, China
| | - Yixin Du
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350013, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou, Fujian 350013, China
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11
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Claus A, Roncatto E, Barroso AAM, May De Mio LL. Herbicides reduce the severity and sporulation of Phakopsora pachyrhizi in soybean with triple herbicide resistance. Pest Manag Sci 2023; 79:3749-3756. [PMID: 37198351 DOI: 10.1002/ps.7557] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 05/19/2023]
Abstract
BACKGROUND Transgenic event DAS44406-6 (E3) makes soybeans that are herbicide [glyphosate (Gly), 2,4-dichlorophenoxyacetic acid (2,4-D) and glufosinate] and caterpillar resistant. The E3 soybean was commercially released for the 2021/2022 harvest in Brazil. We conducted this study to test whether Gly and 2,4-D applied alone and in a commercial mixture affect Asian soybean rust (ASR). Assays were conducted in detached leaves and in vivo, in a controlled environment using the herbicides Gly, 2,4-D and Gly + 2,4-D, and pathogen inoculation. Disease severity and spore production were evaluated. RESULTS Only the herbicides Gly and Gly + 2,4-D inhibited ASR in detached leaves and in vivo. When applied preventively and curatively in vivo, these herbicides reduced the disease severity and spore production of the fungus. In vivo, inhibition of disease severity reached 87% for Gly + 2,4-D and 42% for Gly. A synergistic effect was observed with the commercial Gly + 2,4-D mixture. Application of 2,4-D alone in the in vivo assays did not reduce or increase disease severity. Gly and Gly + 2,4-D act residually in inhibiting the disease. Growing E3 soybeans may combine weed and caterpillar management benefits with ASR inhibition. CONCLUSION Application of Gly and Gly + 2,4-D herbicides in resistant E3 soybean shows inhibitory activity for ASR. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Alexandre Claus
- Plant Science and Plant Health Department, Federal University of Paraná (UFPR) ZIP 80035 050, Curitiba, Brazil
| | - Eduardo Roncatto
- Plant Science and Plant Health Department, Federal University of Paraná (UFPR) ZIP 80035 050, Curitiba, Brazil
| | | | - Louise Larissa May De Mio
- Plant Science and Plant Health Department, Federal University of Paraná (UFPR) ZIP 80035 050, Curitiba, Brazil
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12
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Yan J, Wang L, Xing C, Ma S, Xu J, Shou B, Lan S, Wu X, Cai M. Graphitic carbon nitride alleviates cadmium toxicity to microbial communities in soybean rhizosphere. Environ Sci Pollut Res Int 2023; 30:94988-95001. [PMID: 37542018 DOI: 10.1007/s11356-023-29040-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 07/25/2023] [Indexed: 08/06/2023]
Abstract
Cadmium (Cd) contamination has led to various harmful impacts on soil microbial ecosystem, agricultural crops, and thus human health. Nanomaterials are promising candidates for reducing the accumulation of heavy metals in plants. In this study, graphitic carbon nitride (g-C3N4), a two-dimensional polymeric nanomaterial, was applied for ameliorating Cd phytotoxicity to soybean (Glycine max (L.) Merr.). Its impacts on rhizosphere variables, microorganisms, and metabolism were examined. It was found that g-C3N4 increased carbon/nitrogen/phosphorus (C/N/P) content, especially when N contents were averagely 4.2 times higher in the g-C3N4-treated groups. g-C3N4 significantly induced alterations in microbial community structures (P < 0.05). The abundance of the probiotics class Nitrososphaeria was enriched (on average 70% higher in the g-C3N4-treated groups) as was Actinobacteria (226% higher in the g-C3N4 group than in the CK group). At the genus level, g-C3N4 recruited more Bradyrhizobium (122% higher) in the Cd + g-C3N4 group than in the Cd group and more Sphingomonas (on average 24% higher) in the g-C3N4-treated groups. The changes of microbial clusters demonstrated the potential of g-C3N4 to shape microbial functions, promote plant growth, and enhance Cd resistance, despite observing less pronounced modifications in microbial communities in Cd-contaminated soil compared to Cd-free soil. Moreover, abundance of functional genes related to C/N/P transformation was more significantly promoted by g-C3N4 in Cd-contaminated soil (increased by 146%) than in Cd-free one (increased by 32.8%). Therefore, g-C3N4 facilitated enhanced microbial survival and adaptation through the amplification of functional genes. These results validated the alleviation of g-C3N4 on the microbial communities in the soybean rhizosphere and shed a new light on the application of environmental-friendly nanomaterials for secure production of the crop under soil Cd exposure.
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Affiliation(s)
- Jianfang Yan
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
| | - Liping Wang
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
| | - Chenghua Xing
- College of Agriculture, Jinhua Polytechnic, Jinhua, Zhejiang, 321007, People's Republic of China
| | - Shuting Ma
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
| | - Junzhe Xu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
| | - Beiyi Shou
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
| | - Shasha Lan
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
| | - Xilin Wu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China
| | - Miaozhen Cai
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China.
- Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, Zhejiang, 321004, People's Republic of China.
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13
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Mena E, Reboledo G, Stewart S, Montesano M, Ponce de León I. Comparative analysis of soybean transcriptional profiles reveals defense mechanisms involved in resistance against Diaporthe caulivora. Sci Rep 2023; 13:13061. [PMID: 37567886 PMCID: PMC10421924 DOI: 10.1038/s41598-023-39695-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
Soybean stem canker (SSC) caused by the fungal pathogen Diaporthe caulivora is an important disease affecting soybean production worldwide. However, limited information related to the molecular mechanisms underlying soybean resistance to Diaporthe species is available. In the present work, we analyzed the defense responses to D. caulivora in the soybean genotypes Williams and Génesis 5601. The results showed that compared to Williams, Génesis 5601 is more resistant to fungal infection evidenced by significantly smaller lesion length, reduced disease severity and pathogen biomass. Transcriptional profiling was performed in untreated plants and in D. caulivora-inoculated and control-treated tissues at 8 and 48 h post inoculation (hpi). In total, 2.322 and 1.855 genes were differentially expressed in Génesis 5601 and Williams, respectively. Interestingly, Génesis 5601 exhibited a significantly higher number of upregulated genes compared to Williams at 8 hpi, 1.028 versus 434 genes. Resistance to D. caulivora was associated with defense activation through transcriptional reprogramming mediating perception of the pathogen by receptors, biosynthesis of phenylpropanoids, hormone signaling, small heat shock proteins and pathogenesis related (PR) genes. These findings provide novel insights into soybean defense mechanisms leading to host resistance against D. caulivora, and generate a foundation for the development of resistant SSC varieties within soybean breeding programs.
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Affiliation(s)
- Eilyn Mena
- Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Guillermo Reboledo
- Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Silvina Stewart
- Programa Nacional de Cultivos de Secano, Instituto Nacional de Investigación Agropecuaria (INIA), La Estanzuela, Colonia, Uruguay
| | - Marcos Montesano
- Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
- Laboratorio de Fisiología Vegetal, Centro de Investigaciones Nucleares, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Inés Ponce de León
- Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay.
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14
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Fazal A, Yang M, Wang X, Lu Y, Yao W, Luo F, Han M, Song Y, Cai J, Yin T, Niu K, Sun S, Qi J, Lu G, Wen Z, Yang Y. Discrepancies in rhizobacterial assembly caused by glyphosate application and herbicide-tolerant soybean Co-expressing GAT and EPSPS. J Hazard Mater 2023; 450:131053. [PMID: 36842198 DOI: 10.1016/j.jhazmat.2023.131053] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/30/2022] [Accepted: 02/19/2023] [Indexed: 06/18/2023]
Abstract
There are concerns that the innovation of genetically modified herbicide-tolerant (GMHT) plants, as well as the application of herbicide to such GMHT plants, could have an impact on ecological interactions and unintentionally harm non-targeted organisms. Consequently, we intend to use full-length 16 S rDNA amplicon sequencing to examine changes in the bacterial community in the rhizosphere of GMHT soybean (Z106) harboring 5-enolpyruvylshikimate-3-phosphate synthase and Glyphosate N-acetyltransferase genes and GMHT soybean treated with glyphosate (Z106G). Glyphosate application significantly impacted bacterial alpha diversity (species richness, and Shannon diversity). Permutational multivariate analysis of variance of beta diversity demonstrated that soil compartments and growth stages had a substantial impact on soybean rhizobacterial communities (soil compartments, growth stages, P = 0.001). Community composition revealed that Z106G soils were abundant in Taibaiella and Arthrobacter pascens at maturity, while Chryseobacterium joostei and Stenotrophomonas maltophilia predominated in Z106 soils during flowering. Nitrogen-fixing and phosphate-solubilizing microbes were found in higher proportions in the rhizosphere than in bulk soil, with Sinorhizobium being more abundant in Z106 and Bacillus and Stenotrophomonas being more prevalent in Z106G rhizosphere soils. Collectively, our findings suggest glyphosate application and glyphosate-tolerant soybean as potential regulators of soybean rhizobacterial composition.
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Affiliation(s)
- Aliya Fazal
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Minkai Yang
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Xuan Wang
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Yunting Lu
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Weixuan Yao
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Fuhe Luo
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Mi Han
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Yuchen Song
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Jinfeng Cai
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Tongming Yin
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Kechang Niu
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Shucun Sun
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Jinliang Qi
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Guihua Lu
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; School of Life Sciences, Huaiyin Normal University, Huaian 223300, China
| | - Zhongling Wen
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.
| | - Yonghua Yang
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China.
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15
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Westrick NM, Park SC, Keller NP, Smith DL, Kabbage M. A broadly conserved fungal alcohol oxidase (AOX) facilitates fungal invasion of plants. Mol Plant Pathol 2023; 24:28-43. [PMID: 36251755 PMCID: PMC9742500 DOI: 10.1111/mpp.13274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 09/13/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Alcohol oxidases (AOXs) are ecologically important enzymes that facilitate a number of plant-fungal interactions. Within Ascomycota they are primarily associated with methylotrophy, as a peroxisomal AOX catalysing the conversion of methanol to formaldehyde in methylotrophic yeast. In this study we demonstrate that AOX orthologues are phylogenetically conserved proteins that are common in the genomes of nonmethylotrophic, plant-associating fungi. Additionally, AOX orthologues are highly expressed during infection in a range of diverse pathosystems. To study the role of AOX in plant colonization, AOX knockout mutants were generated in the broad host range pathogen Sclerotinia sclerotiorum. Disease assays in soybean showed that these mutants had a significant virulence defect as evidenced by markedly reduced stem lesions and mortality rates. Chemical genomics suggested that SsAOX may function as an aromatic AOX, and growth assays demonstrated that ΔSsAOX is incapable of properly utilizing plant extract as a nutrient source. Profiling of known aromatic alcohols pointed towards the monolignol coniferyl alcohol (CA) as a possible substrate for SsAOX. As CA and other monolignols are ubiquitous among land plants, the presence of highly conserved AOX orthologues throughout Ascomycota implies that this is a broadly conserved protein used by ascomycete fungi during plant colonization.
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Affiliation(s)
- Nathaniel M. Westrick
- Department of Plant PathologyUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
- United States Department of Agriculture–Agricultural Research ServiceMadisonWisconsinUSA
| | - Sung Chul Park
- Department of Medical Microbiology and ImmunologyUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Nancy P. Keller
- Department of Plant PathologyUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
- Department of Medical Microbiology and ImmunologyUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Damon L. Smith
- Department of Plant PathologyUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
| | - Mehdi Kabbage
- Department of Plant PathologyUniversity of Wisconsin‐MadisonMadisonWisconsinUSA
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16
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Yang M, Luo F, Song Y, Ma S, Ma Y, Fazal A, Yin T, Lu G, Sun S, Qi J, Wen Z, Li Y, Yang Y. The host niches of soybean rather than genetic modification or glyphosate application drive the assembly of root-associated microbial communities. Microb Biotechnol 2022; 15:2942-2957. [PMID: 36336802 PMCID: PMC9733649 DOI: 10.1111/1751-7915.14164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 10/10/2022] [Accepted: 10/17/2022] [Indexed: 11/09/2022] Open
Abstract
Plant roots significantly influence soil microbial diversity, and soil microorganisms play significant roles in both natural and agricultural ecosystems. Although the genetically modified (GM) crops with enhanced insect and herbicide resistance are thought to have unmatched yield and stress resistance advantages, thorough and in-depth case studies still need to be carried out in a real-world setting due to the potential effects of GM plants on soil microbial communities. In this study, three treatments were used: a recipient soybean variety Jack, a triple transgenic soybean line JD321, and the glyphosate-treated JD321 (JD321G). Three sampling stages (flowering, seed filling and maturing), as well as three host niches of soybean rhizosphere [intact roots (RT), rhizospheric soil (RS) and surrounding soil (SS)] were established. In comparison to Jack, the rhizospheric soil of JD321G had higher urease activity and lower nitrite reductase at the flowering stage. Different treatments and different sampling stages existed no significant effects on the compositions of microbial communities at different taxonomic levels. However, at the genus level, the relative abundance of three plant growth-promoting fungal genera (i.e. Mortierella, Chaetomium and Pseudombrophila) increased while endophytic bacteria Chryseobacterium and pathogenic bacteria Streptomyces decreased from the inside to the outside of the roots (i.e. RT → RS → SS). Moreover, two bacterial genera, Bradyrhizobium and Ensifer were more abundant in RT than in RS and SS, as well as three species, Agrobacterium radiobacter, Ensifer fredii and Ensifer meliloti, which are closely related to nitrogen-fixation. Furthermore, five clusters of orthologous groups (COGs) associated to nitrogen-fixation genes were higher in RT than in RS, whereas only one COG annotated as dinitrogenase iron-molybdenum cofactor biosynthesis protein was lower. Overall, the results imply that the rhizosphere host niches throughout the soil-plant continuum largely control the composition and function of the root-associated microbiome of triple transgenic soybean.
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Affiliation(s)
- Minkai Yang
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
- Co‐Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjingChina
| | - Fuhe Luo
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
| | - Yuchen Song
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
| | - Shenglin Ma
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
| | - Yudi Ma
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
| | - Aliya Fazal
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
| | - Tongming Yin
- Co‐Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjingChina
| | - Guihua Lu
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
- Co‐Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjingChina
- School of Life SciencesHuaiyin Normal UniversityHuaianChina
| | - Shucun Sun
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
| | - Jinliang Qi
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
- Co‐Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjingChina
| | - Zhongling Wen
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
- Co‐Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjingChina
| | - Yongchun Li
- State Key Laboratory of Subtropical Silviculture, College of Environmental and Resource SciencesZhejiang A&F UniversityHangzhouChina
| | - Yonghua Yang
- Institute for Plant Molecular Biology, State Key Laboratory of Pharmaceutical Biotechnology, School of Life SciencesNanjing UniversityNanjingChina
- Co‐Innovation Center for Sustainable Forestry in Southern ChinaNanjing Forestry UniversityNanjingChina
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17
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Wang X, Wang M, Wang L, Feng H, He X, Chang S, Wang D, Wang L, Yang J, An G, Wang X, Kong L, Geng Z, Wang E. Whole-plant microbiome profiling reveals a novel geminivirus associated with soybean stay-green disease. Plant Biotechnol J 2022; 20:2159-2173. [PMID: 35869670 PMCID: PMC9616524 DOI: 10.1111/pbi.13896] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/12/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
Microbiota colonize every accessible plant tissue and play fundamental roles in plant growth and health. Soybean stay-green syndrome (SGS), a condition that causes delayed leaf senescence (stay-green), flat pods and abnormal seeds of soybean, has become the most serious disease of soybean in China. However, the direct cause of SGS is highly debated, and little is known about how SGS affect soybean microbiome dynamics, particularly the seed microbiome. We studied the bacterial, fungal, and viral communities associated with different soybean tissues with and without SGS using a multi-omics approach, and investigated the possible pathogenic agents associated with SGS and how SGS affects the assembly and functions of plant-associated microbiomes. We obtained a comprehensive view of the composition, function, loads, diversity, and dynamics of soybean microbiomes in the rhizosphere, root, stem, leaf, pod, and seed compartments, and discovered that soybean SGS was associated with dramatically increased microbial loads and dysbiosis of the bacterial microbiota in seeds. Furthermore, we identified a novel geminivirus that was strongly associated with soybean SGS, regardless of plant cultivar, sampling location, or harvest year. This whole-plant microbiome profiling of soybean provides the first demonstration of geminivirus infection associated with microbiota dysbiosis, which might represent a general microbiological symptom of plant diseases.
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Affiliation(s)
- Xiaolin Wang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghaiChina
| | - Mingxing Wang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghaiChina
- University of Chinese Academy of SciencesBeijingChina
| | - Like Wang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghaiChina
- University of Chinese Academy of SciencesBeijingChina
| | - Huan Feng
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghaiChina
- Northwest A&F UniversityYanglingChina
| | - Xin He
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of AgricultureHenan UniversityKaifengChina
| | - Shihao Chang
- Zhoukou Academy of Agricultural SciencesZhoukouChina
| | - Dapeng Wang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghaiChina
| | - Lei Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of AgricultureHenan UniversityKaifengChina
| | - Jun Yang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghaiChina
| | - Guoyong An
- State Key Laboratory of Crop Stress Adaptation and Improvement, College of AgricultureHenan UniversityKaifengChina
| | | | - Lingrang Kong
- State Key Laboratory of Crop Biology, College of AgronomyShandong Agricultural UniversityTaianChina
| | - Zhen Geng
- Zhoukou Academy of Agricultural SciencesZhoukouChina
| | - Ertao Wang
- National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghaiChina
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18
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Walker DR, McDonald SC, Harris DK, Roger Boerma H, Buck JW, Sikora EJ, Weaver DB, Wright DL, Marois JJ, Li Z. Genomic regions associated with resistance to soybean rust (Phakopsora pachyrhizi) under field conditions in soybean germplasm accessions from Japan, Indonesia and Vietnam. Theor Appl Genet 2022; 135:3073-3086. [PMID: 35902398 PMCID: PMC9482582 DOI: 10.1007/s00122-022-04168-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Eight soybean genomic regions, including six never before reported, were found to be associated with resistance to soybean rust (Phakopsora pachyrhizi) in the southeastern USA. Soybean rust caused by Phakopsora pachyrhizi is one of the most important foliar diseases of soybean [Glycine max (L.) Merr.]. Although seven Rpp resistance gene loci have been reported, extensive pathotype variation in and among fungal populations increases the importance of identifying additional genes and loci associated with rust resistance. One hundred and ninety-one soybean plant introductions from Japan, Indonesia and Vietnam, and 65 plant introductions from other countries were screened for resistance to P. pachyrhizi under field conditions in the southeastern USA between 2008 and 2015. The results indicated that 84, 69, and 49% of the accessions from southern Japan, Vietnam or central Indonesia, respectively, had negative BLUP values, indicating less disease than the panel mean. A genome-wide association analysis using SoySNP50K Infinium BeadChip data identified eight genomic regions on seven chromosomes associated with SBR resistance, including previously unreported regions of Chromosomes 1, 4, 6, 9, 13, and 15, in addition to the locations of the Rpp3 and Rpp6 loci. The six unreported genomic regions might contain novel Rpp loci. The identification of additional sources of rust resistance and associated genomic regions will further efforts to develop soybean cultivars with broad and durable resistance to soybean rust in the southern USA.
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Affiliation(s)
- David R Walker
- USDA-ARS Soybean/Maize Germplasm, Pathology and Genetics Research Unit, and Department of Crop Sciences, University of Illinois, Urbana, IL, 61801, USA.
| | - Samuel C McDonald
- Department of Crop and Soil Sciences and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA, 30602, USA
| | - Donna K Harris
- Department of Crop and Soil Sciences and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA, 30602, USA
- Department of Plant Sciences, Sheridan Research and Extension Center, University of Wyoming, Sheridan, WY, 82801, USA
| | - H Roger Boerma
- Department of Crop and Soil Sciences and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA, 30602, USA
| | - James W Buck
- Department of Plant Pathology, University of Georgia, Griffin, GA, 30223, USA
| | - Edward J Sikora
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, 36849, USA
| | - David B Weaver
- Department of Crop, Soil and Environmental Sciences, Auburn University, Auburn, AL, 36849, USA
| | - David L Wright
- North Florida Research and Education Center, University of Florida, Quincy, FL, 32351, USA
| | - James J Marois
- North Florida Research and Education Center, University of Florida, Quincy, FL, 32351, USA
| | - Zenglu Li
- USDA-ARS Soybean/Maize Germplasm, Pathology and Genetics Research Unit, and Department of Crop Sciences, University of Illinois, Urbana, IL, 61801, USA.
- Department of Crop and Soil Sciences and Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA, 30602, USA.
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19
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Masi M, Castaldi S, Sautua F, Pescitelli G, Carmona MA, Evidente A. Truncatenolide, a Bioactive Disubstituted Nonenolide Produced by Colletotrichum truncatum, the Causal Agent of Anthracnose of Soybean in Argentina: Fungal Antagonism and SAR Studies. J Agric Food Chem 2022; 70:9834-9844. [PMID: 35925677 PMCID: PMC9389607 DOI: 10.1021/acs.jafc.2c02502] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 07/13/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
A bioactive disubstituted nonenolide, named truncatenolide, was produced by Colletotrichum truncatum, which was collected from infected tissues of soybean showing anthracnose symptoms in Argentina. This is a devastating disease that drastically reduces the yield of soybean production in the world. The fungus also produced a new trisubstituted oct-2-en-4-one, named truncatenone, and the well-known tyrosol and N-acetyltyramine. Truncatenolide and truncatenone were characterized by spectroscopic (essentially one-dimensional (1D) and two-dimensional (2D) 1H and 13C NMR and HR ESIMS) and chemical methods as (5E,7R,10R)-7-hydroxy-10-methyl-3,4,7,8,9,10-hexahydro-2H-oxecin-2-one and (Z)-6-hydroxy-3,5-dimethyloct-2-en-4-one, respectively. The geometry of the double bond of truncatenolide was assigned by the value of olefinic proton coupling constant and that of truncatenone by the correlation observed in the corresponding NOESY spectrum. The relative configuration of each stereogenic center was assigned with the help of 13C chemical shift and 1H-1H scalar coupling DFT calculations, while the absolute configuration assignment of truncatenolide was performed by electronic circular dichroism (ECD). When tested on soybean seeds, truncatenolide showed the strongest phytotoxic activity. Tyrosol and N-acetyltyramine also showed phytotoxicity to a lesser extent, while truncatenone weakly stimulated the growth of the seed root in comparison to the control. When assayed against Macrophomina phaseolina and Cercospora nicotianae, other severe pathogens of soybean, truncatenolide showed significant activity against M. phaseolina and total inhibition of C. nicotianae. Thus, some other fungal nonenolides and their derivatives were assayed for their antifungal activity against both fungi in comparison with truncatenolide. Pinolidoxin showed to a less extent antifungal activity against both fungi, while modiolide A selectively and totally inhibited only the growth of C. nicotianae. The SAR results and the potential of truncatenolide, modiolide A, and pinolidoxin as biofungicides were also discussed.
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Affiliation(s)
- Marco Masi
- Dipartimento
di Scienze Chimiche, Università di
Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Stefany Castaldi
- Dipartimento
di Biologia, Università di Napoli
Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Francisco Sautua
- Cátedra
de Fitopatología, Facultad de Agronomía, Universidad de Buenos Aires, C1417DSE Buenos Aires, Argentina
| | - Gennaro Pescitelli
- Dipartimento
di Chimica e Chimica Industriale, Università
di Pisa, Via Moruzzi
13, 56124 Pisa, Italy
| | - Marcelo Anibal Carmona
- Cátedra
de Fitopatología, Facultad de Agronomía, Universidad de Buenos Aires, C1417DSE Buenos Aires, Argentina
| | - Antonio Evidente
- Dipartimento
di Scienze Chimiche, Università di
Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
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20
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Ma C, Borgatta J, Hudson BG, Tamijani AA, De La Torre-Roche R, Zuverza-Mena N, Shen Y, Elmer W, Xing B, Mason SE, Hamers RJ, White JC. Advanced material modulation of nutritional and phytohormone status alleviates damage from soybean sudden death syndrome. Nat Nanotechnol 2020. [PMID: 33077964 DOI: 10.1038/s41565020007761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Customized Cu3(PO4)2 and CuO nanosheets and commercial CuO nanoparticles were investigated for micronutrient delivery and suppression of soybean sudden death syndrome. An ab initio thermodynamics approach modelled how material morphology and matrix effects control the nutrient release. Infection reduced the biomass and photosynthesis by 70.3 and 60%, respectively; the foliar application of nanoscale Cu reversed this damage. Disease-induced changes in the antioxidant enzyme activity and fatty acid profile were also alleviated by Cu amendment. The transcription of two dozen defence- and health-related genes correlates a nanoscale Cu-enhanced innate disease response to reduced pathogenicity and increased growth. Cu-based nanosheets exhibited a greater disease suppression than that of CuO nanoparticles due to a greater leaf surface affinity and Cu dissolution, as determined computationally and experimentally. The findings highlight the importance and tunability of nanomaterial properties, such as morphology, composition and dissolution. The early seedling foliar application of nanoscale Cu to modulate nutrition and enhance immunity offers a great potential for sustainable agriculture.
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Affiliation(s)
- Chuanxin Ma
- The Center for Sustainable Nanotechnology, Department of Chemistry, University of Wisconsin, Madison, WI, USA
- The Center for Sustainable Nanotechnology, Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Jaya Borgatta
- The Center for Sustainable Nanotechnology, Department of Chemistry, University of Wisconsin, Madison, WI, USA
| | - Blake Geoffrey Hudson
- The Center for Sustainable Nanotechnology, Department of Chemistry, University of Iowa, Iowa City, IA, USA
| | - Ali Abbaspour Tamijani
- The Center for Sustainable Nanotechnology, Department of Chemistry, University of Iowa, Iowa City, IA, USA
| | - Roberto De La Torre-Roche
- The Center for Sustainable Nanotechnology, Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Nubia Zuverza-Mena
- The Center for Sustainable Nanotechnology, Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Yu Shen
- The Center for Sustainable Nanotechnology, Department of Chemistry, University of Wisconsin, Madison, WI, USA
- The Center for Sustainable Nanotechnology, Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Wade Elmer
- The Center for Sustainable Nanotechnology, Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA
| | - Sara Elizabeth Mason
- The Center for Sustainable Nanotechnology, Department of Chemistry, University of Iowa, Iowa City, IA, USA
| | - Robert John Hamers
- The Center for Sustainable Nanotechnology, Department of Chemistry, University of Wisconsin, Madison, WI, USA
| | - Jason Christopher White
- The Center for Sustainable Nanotechnology, Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, CT, USA.
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21
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Boudhrioua C, Bastien M, Torkamaneh D, Belzile F. Genome-wide association mapping of Sclerotinia sclerotiorum resistance in soybean using whole-genome resequencing data. BMC Plant Biol 2020; 20:195. [PMID: 32380949 DOI: 10.21203/rs.2.14709/v2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 04/21/2020] [Indexed: 05/20/2023]
Abstract
BACKGROUND Sclerotinia stem rot (SSR), caused by Sclerotinia sclerotiorum (Lib.) de Bary, is an important cause of yield loss in soybean. Although many papers have reported different loci contributing to partial resistance, few of these were proved to reproduce the same phenotypic impact in different populations. RESULTS In this study, we identified a major quantitative trait loci (QTL) associated with resistance to SSR progression on the main stem by using a genome-wide association mapping (GWAM). A population of 127 soybean accessions was genotyped with 1.5 M SNPs derived from genotyping-by-sequencing (GBS) and whole-genome sequencing (WGS) ensuring an extensive genome coverage and phenotyped for SSR resistance. SNP-trait association led to discovery of a new QTL on chromosome 1 (Chr01) where resistant lines had shorter lesions on the stem by 29 mm. A single gene (Glyma.01 g048000) resided in the same LD block as the peak SNP, but it is of unknown function. The impact of this QTL was even more significant in the descendants of a cross between two lines carrying contrasted alleles for Chr01. Individuals carrying the resistance allele developed lesions almost 50% shorter than those bearing the sensitivity allele. CONCLUSION These results suggest that the new region on chromosome 1 harbors a promising resistance QTL to SSR that can be used in soybean breeding program.
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Affiliation(s)
- Chiheb Boudhrioua
- Département de phytologie and Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, G1V0A6, Canada
| | - Maxime Bastien
- Département de phytologie and Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, G1V0A6, Canada
| | - Davoud Torkamaneh
- Département de phytologie and Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, G1V0A6, Canada
| | - François Belzile
- Département de phytologie and Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, Quebec, G1V0A6, Canada.
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22
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Ghimire K, Petrović K, Kontz BJ, Bradley CA, Chilvers MI, Mueller DS, Smith DL, Wise KA, Mathew FM. Inoculation Method Impacts Symptom Development Associated with Diaporthe aspalathi, D. caulivora, and D. longicolla on Soybean (Glycine max). Plant Dis 2019. [PMID: 30742552 DOI: 10.1094/pdis-06-18-1078-re103(4):677-684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
One hundred fifty-two Diaporthe isolates were recovered from symptomatic soybean (Glycine max) stems sampled from the U.S. states of Iowa, Indiana, Kentucky, Michigan, and South Dakota. Using morphology and DNA sequencing, isolates were identified as D. aspalathi (8.6%), D. caulivora (24.3%), and D. longicolla (67.1%). Aggressiveness of five isolates each of the three pathogens was studied on cultivars Hawkeye (D. caulivora and D. longicolla) and Bragg (D. aspalathi) using toothpick, stem-wound, mycelium contact, and spore injection inoculation methods in the greenhouse. For D. aspalathi, methods significantly affected disease severity (P < 0.001) and pathogen recovery (P < 0.001). The relative treatment effects (RTE) of stem-wound and toothpick methods were significantly greater than for the other methods. For D. caulivora and D. longicolla, a significant isolate × method interaction affected disease severity (P < 0.05) and pathogen recovery (P < 0.001). Significant differences in RTEs were observed among D. caulivora and D. longicolla isolates only when the stem-wound and toothpick methods were used. Our study has determined that the stem-wound and toothpick methods are reliable to evaluate the three pathogens; however, the significant isolate × method interactions for D. caulivora and D. longicolla indicate that multiple isolates should also be considered for future pathogenicity studies.
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Affiliation(s)
- Krishna Ghimire
- 1 Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD 57007, U.S.A
| | - Kristina Petrović
- 1 Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD 57007, U.S.A
- 2 Institute of Field and Vegetable Crops, Department of Soybean, Maksima Gorkog 30, Novi Sad 21000, Serbia
| | - Brian J Kontz
- 1 Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD 57007, U.S.A
| | - Carl A Bradley
- 3 Department of Plant Pathology, University of Kentucky Research and Education Center, Princeton, KY 42445, U.S.A
| | - Martin I Chilvers
- 4 Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A
| | - Daren S Mueller
- 5 Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, U.S.A
| | - Damon L Smith
- 6 Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI 53706, U.S.A.; and
| | - Kiersten A Wise
- 7 Department of Botany and Plant Pathology, West Lafayette, IN 47907, U.S.A
| | - Febina M Mathew
- 1 Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD 57007, U.S.A
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23
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Veličković D, Agtuca BJ, Stopka SA, Vertes A, Koppenaal DW, Paša-Tolić L, Stacey G, Anderton CR. Observed metabolic asymmetry within soybean root nodules reflects unexpected complexity in rhizobacteria-legume metabolite exchange. ISME J 2018. [PMID: 29899508 DOI: 10.1038/s41396-018-0188-188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
In this study, the three-dimensional spatial distributions of a number of metabolites involved in regulating symbiosis and biological nitrogen fixation (BNF) within soybean root nodules were revealed using matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI). While many metabolites exhibited distinct spatial compartmentalization, some metabolites were asymmetrically distributed throughout the nodule (e.g., S-adenosylmethionine). These results establish a more complex metabolic view of plant-bacteria symbiosis (and BNF) within soybean nodules than previously hypothesized. Collectively these findings suggest that spatial perspectives in metabolic regulation should be considered to unravel the overall complexity of interacting organisms, like those relating to associations of nitrogen-fixing bacteria with host plants.
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Affiliation(s)
- Dušan Veličković
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA
| | - Beverly J Agtuca
- Divisions of Plant Sciences and Biochemistry, C. S. Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Sylwia A Stopka
- Department of Chemistry, The George Washington University, Washington, DC, 20052, USA
| | - Akos Vertes
- Department of Chemistry, The George Washington University, Washington, DC, 20052, USA
| | - David W Koppenaal
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA
| | - Ljiljana Paša-Tolić
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA
| | - Gary Stacey
- Divisions of Plant Sciences and Biochemistry, C. S. Bond Life Sciences Center, University of Missouri, Columbia, MO, 65211, USA
| | - Christopher R Anderton
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA.
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24
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Deb D, Anderson RG, How-Yew-Kin T, Tyler BM, McDowell JM. Conserved RxLR Effectors From Oomycetes Hyaloperonospora arabidopsidis and Phytophthora sojae Suppress PAMP- and Effector-Triggered Immunity in Diverse Plants. Mol Plant Microbe Interact 2018. [PMID: 29106332 DOI: 10.1094/mpmi-07-17-016-9-fi] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Effector proteins are exported to the interior of host cells by diverse plant pathogens. Many oomycete pathogens maintain large families of candidate effector genes, encoding proteins with a secretory leader followed by an RxLR motif. Although most of these genes are very divergent between oomycete species, several genes are conserved between Phytophthora species and Hyaloperonospora arabidopsidis, suggesting that they play important roles in pathogenicity. We describe a pair of conserved effector candidates, HaRxL23 and PsAvh73, from H. arabidopsidis and P. sojae respectively. We show that HaRxL23 is expressed early during infection of Arabidopsis. HaRxL23 triggers an ecotype-specific defense response in Arabidopsis, suggesting that it is recognized by a host surveillance protein. HaRxL23 and PsAvh73 can suppress pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) in Nicotiana benthamiana and effector-triggered immunity (ETI) in soybean. Transgenic Arabidopsis constitutively expressing HaRxL23 or PsAvh73 exhibit suppression of PTI and enhancement of bacterial and oomycete virulence. Together, our experiments demonstrate that these conserved oomycete RxLR effectors suppress PTI and ETI across diverse plant species.
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Affiliation(s)
- Devdutta Deb
- 1 Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, 24061-0329, U.S.A
| | - Ryan G Anderson
- 1 Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, 24061-0329, U.S.A
| | - Theresa How-Yew-Kin
- 1 Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, 24061-0329, U.S.A
| | - Brett M Tyler
- 2 Center for Genome Research and Biocomputing, and Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331, U.S.A
| | - John M McDowell
- 1 Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, 24061-0329, U.S.A
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25
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Alves MS, Soares ZG, Vidigal PMP, Barros EG, Poddanosqui AMP, Aoyagi LN, Abdelnoor RV, Marcelino-Guimarães FC, Fietto LG. Differential expression of four soybean bZIP genes during Phakopsora pachyrhizi infection. Funct Integr Genomics 2015. [PMID: 26013145 DOI: 10.1007/s10142-015-0445-440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
Asian soybean rust (ASR), caused by the obligate biotrophic fungus Phakopsora pachyrhizi, is one of most important diseases in the soybean (Glycine max (L.) Merr.) agribusiness. The identification and characterization of genes related to plant defense responses to fungal infection are essential to develop ASR-resistant plants. In this work, we describe four soybean genes, GmbZIP62, GmbZIP105, GmbZIPE1, and GmbZIPE2, which encode transcription factors containing a basic leucine zipper (bZIP) domain from two divergent classes, and that are responsive to P. pachyrhizi infection. Molecular phylogenetic analyses demonstrated that these genes encode proteins similar to bZIP factors responsive to pathogens. Yeast transactivation assays showed that only GmbZIP62 has strong transactivation activity in yeast. In addition, three of the bZIP transcription factors analyzed were also differentially expressed by plant defense hormones, and all were differentially expressed by fungal attack, indicating that these proteins might participate in response to ASR infection. The results suggested that these bZIP proteins are part of the plant defense response to P. pachyrhizi infection, by regulating the gene expression related to ASR infection responses. These bZIP genes are potential targets to obtain new soybean genotypes resistant to ASR.
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Affiliation(s)
- Murilo S Alves
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil
| | - Zamira G Soares
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil
| | - Pedro M P Vidigal
- Núcleo de Análise de Biomoléculas, NuBioMol, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil
| | - Everaldo G Barros
- Universidade Católica de Brasília, 70790-160, Brasília, Distrito Federal, Brazil
| | | | | | | | | | - Luciano G Fietto
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil.
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26
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Kulkarni G, Busset N, Molinaro A, Gargani D, Chaintreuil C, Silipo A, Giraud E, Newman DK. Specific hopanoid classes differentially affect free-living and symbiotic states of Bradyrhizobium diazoefficiens. mBio 2015. [PMID: 26489859 DOI: 10.1128/mbio.01251-1215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
UNLABELLED A better understanding of how bacteria resist stresses encountered during the progression of plant-microbe symbioses will advance our ability to stimulate plant growth. Here, we show that the symbiotic system comprising the nitrogen-fixing bacterium Bradyrhizobium diazoefficiens and the legume Aeschynomene afraspera requires hopanoid production for optimal fitness. While methylated (2Me) hopanoids contribute to growth under plant-cell-like microaerobic and acidic conditions in the free-living state, they are dispensable during symbiosis. In contrast, synthesis of extended (C35) hopanoids is required for growth microaerobically and under various stress conditions (high temperature, low pH, high osmolarity, bile salts, oxidative stress, and antimicrobial peptides) in the free-living state and also during symbiosis. These defects might be due to a less rigid membrane resulting from the absence of free or lipidA-bound C35 hopanoids or the accumulation of the C30 hopanoid diploptene. Our results also show that C35 hopanoids are necessary for symbiosis only with the host Aeschynomene afraspera but not with soybean. This difference is likely related to the presence of cysteine-rich antimicrobial peptides in Aeschynomene nodules that induce drastic modification in bacterial morphology and physiology. The study of hopanoid mutants in plant symbionts thus provides an opportunity to gain insight into host-microbe interactions during later stages of symbiotic progression, as well as the microenvironmental conditions for which hopanoids provide a fitness advantage. IMPORTANCE Because bradyrhizobia provide fixed nitrogen to plants, this work has potential agronomical implications. An understanding of how hopanoids facilitate bacterial survival in soils and plant hosts may aid the engineering of more robust agronomic strains, especially relevant in regions that are becoming warmer and saline due to climate change. Moreover, this work has geobiological relevance: hopanes, molecular fossils of hopanoids, are enriched in ancient sedimentary rocks at discrete intervals in Earth history. This is the first study to uncover roles for 2Me- and C35 hopanoids in the context of an ecological niche that captures many of the stressful environmental conditions thought to be important during (2Me)-hopane deposition. Though much remains to be done to determine whether the conditions present within the plant host are shared with niches of relevance to the rock record, our findings represent an important step toward identifying conserved mechanisms whereby hopanoids contribute to fitness.
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Affiliation(s)
- Gargi Kulkarni
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA
| | - Nicolas Busset
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRA/UM2/CIRAD, Montpellier, France
| | - Antonio Molinaro
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Naples, Italy
| | | | - Clemence Chaintreuil
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRA/UM2/CIRAD, Montpellier, France
| | - Alba Silipo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Naples, Italy
| | - Eric Giraud
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), UMR IRD/SupAgro/INRA/UM2/CIRAD, Montpellier, France
| | - Dianne K Newman
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA Howard Hughes Medical Institute, Pasadena, California, USA Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA
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27
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Han Q, Feng H, Zhao H, Huang L, Wang X, Wang X, Kang Z. Effect of a benzothiadiazole on inducing resistance of soybean to Phytophthora sojae. Protoplasma 2013. [PMID: 22777214 DOI: 10.1007/s00709-012-0430-436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Effects of benzothidiazole (BTH), an inducer of resistance, were examined in a compatible interaction of soybean seedlings and Phytophthora sojae using electron microscopy and quantitative real-time polymerase chain reaction (qRT-PCR) techniques. Seedlings were sprayed with BTH 2 days before inoculation of hypocotyls with zoospore suspension of P. sojae. In hypocotyls treated with BTH, the infection process of P. sojae was significantly delayed, and also the structures of hyphae and haustorium-like bodies were remarkably altered. These changes included increased vacuolation, plasmolysis, degeneration of cytoplasm, and collapse of hyphae and haustorium-like bodies. Large morphological differences were detected in P. sojae-infected hypocotyl tissue treated with BTH compared with infected but non-treated control tissue. Very thick layers of wall appositions were formed in the host cells contacting with hyphae, whereas such structures were never observed in only P. sojae-infected control hypocotyls. In addition, five pathogenesis-related (PR)-genes were selected to detect their transcription changes using qRT-PCR. Expression of PR-1, PR-3a, PR-3b, PR-9, and PR-10 genes were induced in BTH-treated and P. sojae-inoculated tissue at different times and levels. The up-regulated expression of these genes as well as the morphological defense structures may contribute to disease resistance in soybean hypocotyls to P. sojae.
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Affiliation(s)
- Qingmei Han
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University, 712100, Yangling, China
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28
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de Souza JAM, Tieppo E, Magnani GDS, Alves LMC, Cardoso RL, Cruz LM, de Oliveira LF, Raittz RT, de Souza EM, Pedrosa FDO, Lemos EGDM. Draft genome sequence of the nitrogen-fixing symbiotic bacterium Bradyrhizobium elkanii 587. J Bacteriol 2012. [PMID: 22689236 DOI: 10.1128/jb.00563-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
The draft sequence of the genome of Bradyrhizobium elkanii 587 is presented. This was obtained using Illumina Next-Gen DNA sequencing combined with Sanger sequencing. Genes for the pathways involved in biological nitrogen fixation (the nif gene cluster), nod genes including nodABC, and genes for the type III protein secretion system (T3SS) are present.
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29
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Ivanov S, Fedorova EE, Limpens E, De Mita S, Genre A, Bonfante P, Bisseling T. Rhizobium-legume symbiosis shares an exocytotic pathway required for arbuscule formation. Proc Natl Acad Sci U S A 2012. [PMID: 22566631 DOI: 10.1073/pnas.1200407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
Endosymbiotic interactions are characterized by the formation of specialized membrane compartments, by the host in which the microbes are hosted, in an intracellular manner. Two well-studied examples, which are of major agricultural and ecological importance, are the widespread arbuscular mycorrhizal symbiosis and the Rhizobium-legume symbiosis. In both symbioses, the specialized host membrane that surrounds the microbes forms a symbiotic interface, which facilitates the exchange of, for example, nutrients in a controlled manner and, therefore, forms the heart of endosymbiosis. Despite their key importance, the molecular and cellular mechanisms underlying the formation of these membrane interfaces are largely unknown. Recent studies strongly suggest that the Rhizobium-legume symbiosis coopted a signaling pathway, including receptor, from the more ancient arbuscular mycorrhizal symbiosis to form a symbiotic interface. Here, we show that two highly homologous exocytotic vesicle-associated membrane proteins (VAMPs) are required for formation of the symbiotic membrane interface in both interactions. Silencing of these Medicago VAMP72 genes has a minor effect on nonsymbiotic plant development and nodule formation. However, it blocks symbiosome as well as arbuscule formation, whereas root colonization by the microbes is not affected. Identification of these VAMP72s as common symbiotic regulators in exocytotic vesicle trafficking suggests that the ancient exocytotic pathway forming the periarbuscular membrane compartment has also been coopted in the Rhizobium-legume symbiosis.
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Affiliation(s)
- Sergey Ivanov
- Laboratory of Molecular Biology, Department of Plant Sciences, Graduate School Experimental Plant Sciences, Wageningen University, 6708 PB Wageningen, The Netherlands
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30
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Sant'Anna JR, Miyamoto CT, Rosada LJ, Franco CCS, Kaneshima EN, Castro-Prado MAA. Genetic relatedness of Brazilian Colletotrichum truncatum isolates assessed by vegetative compatibility groups and RAPD analysis. Biol Res 2010; 43:51-62. [PMID: 21157632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
The genetic variation among nine soybean-originating isolates of Colletotrichum truncatum from different Brazilian states was studied. Nitrate non-utilizing (nit) mutants were obtained with potassium chlorate and used to characterize vegetative compatibility reactions, heterokaryosis and RAPD profile. Based on pairings of nit mutants from the different isolates, five vegetative complementation groups (VCG) were identified, and barriers to the formation of heterokaryons were observed among isolates derived from the same geographic area. No complementation was observed among any of the nit mutants recovered from the isolate A, which was designed heterokaryon-self-incompatible. Based on RAPD analysis, a polymorphism was detected among the wild isolate C and their nit1 and NitM mutants. RAPD amplification, with five different primers, also showed polymorphic profiles among Brazilian C. truncatum isolates. Dendrogram analysis resulted in a similarity degree ranging between 0.331 and 0.882 among isolates and identified three RAPD groups. Despite the lack of a correlation between the RAPD analysis and the vegetative compatibility grouping, results demonstrated the potential of VCG analysis to differentiate C. truncatum isolates genotypically similar when compared by RAPD.
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Affiliation(s)
- Juliane R Sant'Anna
- Departamento de Biologia Celular e Genética, Universidade Estadual de MaringáBrasil
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31
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Hamayun M, Khan SA, Khan AL, Rehman G, Sohn EY, Shah AA, Kim SK, Joo GJ, Lee IJ. Phoma herbarum as a new gibberellin-producing and plant growth-promoting fungus. J Microbiol Biotechnol 2009. [PMID: 19884787 DOI: 10.4014/jmb.0901.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
Endophytic fungi are known for the production of valuable metabolites, but information on the gibberellin production capacity of this group is limited. We isolated 9 endophytic fungi from the roots of salt-stressed soybean plants and screened them on waito-c rice, in order to identify plant growth promoting fungal strains. The fungal isolate TK- 2-4 gave maximum plant length (20.35 cm) promotion in comparison with wild-type Gibberella fujikuroi (19.5 cm). In a separate experiment, bioassay of TK-2-4 promoted plant length and biomass of soybean cultivar Taegwangkong. The TK-2-4 culture filtrate was analyzed for the presence of gibberellins, and it was found that all physiologically active gibberellins, especially GA(4) and GA(7), were present in higher amounts (GA(1), 0.11 ng/ml; GA(3), 2.91 ng/ml; GA(4), 3.21 ng/ml; and GA(7), 1.4 ng/ml) in conjunction with physiologically inactive GA(9) (0.05 ng/ml), GA(12) (0.23 ng/ ml), GA(15) (0.42 ng/ml), GA(19) (0.53 ng/ml), and GA(20) (0.06 ng/ml). The fungal isolate TK-2-4 was later identified as a new strain of Phoma herbarum, through the phylogenetic analysis of 28S rDNA sequence.
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Affiliation(s)
- Muhammad Hamayun
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Korea
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32
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Crespo-Rivas JC, Margaret I, Pérez-Montaño F, López-Baena FJ, Vinardell JM, Ollero FJ, Moreno J, Ruiz-Sainz JE, Buendía-Clavería AM. A pyrF auxotrophic mutant of Sinorhizobium fredii HH103 impaired in its symbiotic interactions with soybean and other legumes. Int Microbiol 2007; 10:169-176. [PMID: 18075998 DOI: 10.2436/20.1501.01.24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Transposon Tn5-Mob mutagenesis allowed the selection of a Sinorhizobium fredii HH103 mutant derivative (SVQ 292) that requires the presence of uracil to grow in minimal media. The mutated gene, pyrF, codes for an orotidine-5 - monophosphate decarboxylase (EC 4.1.1.23). Mutant SVQ 292 and its parental prototrophic mutant HH103 showed similar Nod-factor and lipopolysaccharide profiles. The symbiotic properties of mutant SVQ 292 were severely impaired with all legumes tested. Mutant SVQ 292 formed small ineffective nodules on Cajanus cajan and abnormal nodules (pseudonodules) unable to fix nitrogen on Glycine max (soybean), Macroptitlium atropurpureum, Indigofera tinctoria, and Desmodium canadense. It also did not induce any macroscopic response in Macrotyloma axillare roots. The symbiotic capacity of SVQ 292 with soybean was not enhanced by the addition of uracil to the plant nutritive solution.
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Affiliation(s)
- Juan C Crespo-Rivas
- Department of Microbiology, Faculty of Biology, University of Sevilla, Sevilla, Spain
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33
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Ashfield T, Ong LE, Nobuta K, Schneider CM, Innes RW. Convergent evolution of disease resistance gene specificity in two flowering plant families. Plant Cell 2004. [PMID: 14742871 DOI: 10.1105/tpc.016725.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Plant disease resistance (R) genes that mediate recognition of the same pathogen determinant sometimes can be found in distantly related plant families. This observation implies that some R gene alleles may have been conserved throughout the diversification of land plants. To address this question, we have compared R genes from Glycine max (soybean), Rpg1-b, and Arabidopsis thaliana, RPM1, that mediate recognition of the same type III effector protein from Pseudomonas syringae, AvrB. RPM1 has been cloned previously, and here, we describe the isolation of Rpg1-b. Although RPM1 and Rpg1-b both belong to the coiled-coil nucleotide binding site (NBS) Leu-rich repeat (LRR) class of R genes, they share only limited sequence similarity outside the conserved domains characteristic of this class. Phylogenetic analyses of A. thaliana and legume NBS-LRR sequences demonstrate that Rpg1-b and RPM1 are not orthologous. We conclude that convergent evolution, rather than the conservation of an ancient specificity, is responsible for the generation of these AvrB-specific genes.
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Affiliation(s)
- Tom Ashfield
- Department of Biology, Indiana University, Bloomington, Indiana 47405-7107, USA
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34
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Liu Y, Dammann C, Bhattacharyya MK. The matrix metalloproteinase gene GmMMP2 is activated in response to pathogenic infections in soybean. Plant Physiol 2001. [PMID: 11743122 DOI: 10.1104/pp.010593] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Matrix metalloproteinases (MMPs) play an important role in host defense responses against pathogens in mammals where their activities lead to the production of antimicrobial peptides. We have identified a novel soybean (Glycine max) metalloproteinase gene, GmMMP2, that is transcriptionally up-regulated in infected tissues. The deduced amino acid sequence indicates that this gene belongs to the MMP family. It is a preproprotein containing an N-terminal signal peptide, a cysteine switch, a zinc-binding catalytic motif, and a C-terminal transmembrane domain. The GmMMP2 expressed in and purified from Escherichia coli exhibited an in vitro enzymatic activity in digesting myelin basic protein. All plant metalloproteinases reported so far have no known functions. However, they have been suggested to be involved in extracellular cell matrix degradation during development or senescence. Our investigations demonstrate that the GmMMP2 transcript levels were rapidly increased in compatible and incompatible interactions of soybean tissues with the oomycete pathogen Phytophthora sojae or the bacterial pathogen Pseudomonas syringae pv. glycinea. In agreement with the GmMMP2 activation, a metalloproteinase activity was gradually increased in suspension-cultured cells following the bacterial infection. GmMMP2 was also activated in response to wounding and dehydration. However, GmMMP2 activation did not correlate with the oxidative burst leading to the hypersensitive response cell death or the tissue senescence progress that involves programmed cell death. Our investigations suggest that GmMMP2 may be involved in a novel defense response of soybean against pathogenic infections.
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Affiliation(s)
- Y Liu
- Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, Oklahoma 73402, USA.
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35
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Abstract
The USDA, ARS National Rhizobium Germplasm Collection contains 143 accessions of slow-growing soybean strains among which there are 17 distinct serological groups. However, 11 strains appear to have no serological affinity with the 17 serogroups. Therefore, we determined whether these strains were diverse and examined their phylogenetic placement. Nine strains formed nitrogen-fixing symbioses with soybean indicating that these accessions were not contaminants. We concluded from results of amplified fragment length polymorphism (AFLP) analysis, using 3 selective primers with 8 strains, that they were genetically dissimilar. Nine strains were examined for their fatty acid composition using fatty acid methyl ester (FAME) derivatives. The FAME results with 5 strains and serotype strains of Bradyrhizobium elkanii were similar, while results with each of the remaining 2 pairs were either similar to the type strain of Bradyrhizobium japonicum (USDA 6) or to USDA 110. Evolutionary history of 9 strains was reconstructed from sequence divergence of a combination of the complete 16S rRNA gene, the internally transcribed spacer region, and about 400 bases of the 5' end of the 23S rRNA gene. Placement of 5 strains was nested within B. elkanii, 2 with USDA 110, and the other 2 with USDA 6. We concluded that soybean isolates that cannot be placed within one of the 17 established serogroups are phenotypically and genetically as diverse as the serotype strains.
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Affiliation(s)
- P van Berkum
- Soybean and Alfalfa Research Laboratory, USDA, ARS, Beltsville, MD 20705, USA.
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36
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Cessna SG, Sears VE, Dickman MB, Low PS. Oxalic acid, a pathogenicity factor for Sclerotinia sclerotiorum, suppresses the oxidative burst of the host plant. Plant Cell 2000. [PMID: 11090218 DOI: 10.2307/3871114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Effective pathogenesis by the fungus Sclerotinia sclerotiorum requires the secretion of oxalic acid. Studies were conducted to determine whether oxalate aids pathogen compatibility by modulating the oxidative burst of the host plant. Inoculation of tobacco leaves with an oxalate-deficient nonpathogenic mutant of S. sclerotiorum induced measurable oxidant biosynthesis, but inoculation with an oxalate-secreting strain did not. Oxalate inhibited production of H(2)O(2) in tobacco and soybean cultured cell lines with a median inhibitory concentration of approximately 4 to 5 mM, a concentration less than that measured in preparations of the virulent fungus. Several observations also indicate that the inhibitory effects of oxalate are largely independent of both its acidity and its affinity for Ca(2)+. These and other data demonstrate that oxalate may inhibit a signaling step positioned upstream of oxidase assembly/activation but downstream of Ca(2)+ fluxes into the plant cell cytosol.
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Affiliation(s)
- S G Cessna
- Department of Chemistry, Purdue University, 1393 Brown Building, West Lafayette, Indiana 47904-1393, USA
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Jenner C, Hitchin E, Mansfield J, Walters K, Betteridge P, Teverson D, Taylor J. Gene-for-gene interactions between Pseudomonas syringae pv. phaseolicola and Phaseolus. Mol Plant Microbe Interact 1991. [PMID: 1666524 DOI: 10.1094/mpmi-4-553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The gene for cultivar-specific avirulence to Phaseolus vulgaris cv. Tendergreen in races 3 and 4 of Pseudomonas syringae pv. phaseolicola was isolated and sequenced. Genomic clones from libraries of race 3 in pLAFR1 and race 4 in pLAFR3, which altered the phenotype of race 5 from virulent to avirulent in Tendergreen, were found to possess a common approximately 15-kb region of DNA that contained the determinant of avirulence. Subcloning and insertion mutagenesis with Tn1000 located an avirulence gene within a 1.4-kb BglII/HindIII DNA fragment in races 3 and 4. Comparison of the nucleotide sequences of regions of DNA that confer avirulence confirmed that both races have an identical gene for avirulence (designated avrPph3) comprising 801 base pairs (bp) and predicted to encode a cytoplasmic protein of 28,703 Da. A sequence, TGCAACCGAAT, 91% homologous to the motif found in promoter regions of avrB and avrD from P. s. pv. glycinea was located 89-99 bp upstream of the start of the open-reading frame 1. Hybridization experiments showed that avrPph3 was not plasmid-borne and was absent from isolates of P. s. pv. phaseolicola races 1, 2, 5, 6, 7, and 8, P. cichorii, P. s. pvs. coronafaciens, glycinea, maculicola, pisi, syringae, and tabaci. Cosegregation studies of crosses between cultivars resistant (Tendergreen) and susceptible (Canadian Wonder) to races 3 and 4 and transconjugants of race 5 confirmed that a gene-for-gene relationship controls specificity in the interaction between Tendergreen and races 3 and 4 of P. s. pv. phaseolicola.
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Affiliation(s)
- C Jenner
- Department of Biochemistry and Biological Sciences, Wye College, Ashford, Kent, U.K
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38
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Whalen MC, Innes RW, Bent AF, Staskawicz BJ. Identification of Pseudomonas syringae pathogens of Arabidopsis and a bacterial locus determining avirulence on both Arabidopsis and soybean. Plant Cell 1991; 3:49-59. [PMID: 1824334 DOI: 10.2307/3869199] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
To develop a model system for molecular genetic analysis of plant-pathogen interactions, we studied the interaction between Arabidopsis thaliana and the bacterial pathogen Pseudomonas syringae pv tomato (Pst). Pst strains were found to be virulent or avirulent on specific Arabidopsis ecotypes, and single ecotypes were resistant to some Pst strains and susceptible to others. In many plant-pathogen interactions, disease resistance is controlled by the simultaneous presence of single plant resistance genes and single pathogen avirulence genes. Therefore, we tested whether avirulence genes in Pst controlled induction of resistance in Arabidopsis. Cosmids that determine avirulence were isolated from Pst genomic libraries, and the Pst avirulence locus avrRpt2 was defined. This allowed us to construct pathogens that differed only by the presence or absence of a single putative avirulence gene. We found that Arabidopsis ecotype Col-0 was susceptible to Pst strain DC3000 but resistant to the same strain carrying avrRpt2, suggesting that a single locus in Col-0 determines resistance. As a first step toward genetically mapping the postulated resistance locus, an ecotype susceptible to infection by DC3000 carrying avrRpt2 was identified. The avrRpt2 locus from Pst was also moved into virulent strains of the soybean pathogen P. syringae pv glycinea to test whether this locus could determine avirulence on soybean. The resulting strains induced a resistant response in a cultivar-specific manner, suggesting that similar resistance mechanisms may function in Arabidopsis and soybean.
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Affiliation(s)
- M C Whalen
- Department of Plant Pathology, University of California, Berkley 94720
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