|
1
|
Yu T, Wu X, Song Y, Lv H, Zhang G, Tang W, Zheng Z, Wang X, Gu Y, Zhou X, Li J, Tian S, Hou X, Chen Q, Xin D, Ni H. Isolation and Identification of Salinity-Tolerant Rhizobia and Nodulation Phenotype Analysis in Different Soybean Germplasms. Curr Issues Mol Biol 2024; 46:3342-3352. [PMID: 38666939 PMCID: PMC11049135 DOI: 10.3390/cimb46040209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/01/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
Increasing the soybean-planting area and increasing the soybean yield per unit area are two effective solutions to improve the overall soybean yield. Northeast China has a large saline soil area, and if soybeans could be grown there with the help of isolated saline-tolerant rhizobia, the soybean cultivation area in China could be effectively expanded. In this study, soybeans were planted in soils at different latitudes in China, and four strains of rhizobia were isolated and identified from the soybean nodules. According to the latitudes of the soil-sampling sites from high to low, the four isolated strains were identified as HLNEAU1, HLNEAU2, HLNEAU3, and HLNEAU4. In this study, the isolated strains were identified for their resistances, and their acid and saline tolerances and nitrogen fixation capacities were preliminarily identified. Ten representative soybean germplasm resources in Northeast China were inoculated with these four strains, and the compatibilities of these four rhizobium strains with the soybean germplasm resources were analyzed. All four isolates were able to establish different extents of compatibility with 10 soybean resources. Hefeng 50 had good compatibility with the four isolated strains, while Suinong 14 showed the best compatibility with HLNEAU2. The isolated rhizobacteria could successfully establish symbiosis with the soybeans, but host specificity was also present. This study was a preliminary exploration of the use of salinity-tolerant rhizobacteria to help the soybean nitrogen fixation in saline soils in order to increase the soybean acreage, and it provides a valuable theoretical basis for the application of saline-tolerant rhizobia.
Collapse
Affiliation(s)
- Tong Yu
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Xiaodong Wu
- Heilongjiang Green Food Science Research Institute, Harbin 150000, China;
| | - Yunshan Song
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Hao Lv
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Guoqing Zhang
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Weinan Tang
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Zefeng Zheng
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Xiaohan Wang
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Yumeng Gu
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Xin Zhou
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Jianlin Li
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Siyi Tian
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Xiuming Hou
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Qingshan Chen
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Dawei Xin
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| | - Hejia Ni
- Key Laboratory of Soybean Biology of the Chinese Ministry of Education, Key Laboratory of Soybean Biology and Breeding, Genetics of Chinese Agriculture Ministry, College of Agriculture, Northeast Agricultural University, Harbin 150036, China; (T.Y.); (Y.S.); (H.L.); (G.Z.); (W.T.); (Z.Z.); (X.W.); (Y.G.); (X.Z.); (J.L.); (S.T.); (X.H.); (Q.C.)
| |
Collapse
|
|
2
|
Zhang X, Chen JX, Lian WT, Zhou HW, He Y, Li XX, Liao H. Molecular module GmPTF1a/b-GmNPLa regulates rhizobia infection and nodule formation in soybean. THE NEW PHYTOLOGIST 2024; 241:1813-1828. [PMID: 38062896 DOI: 10.1111/nph.19462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 11/08/2023] [Indexed: 01/26/2024]
Abstract
Nodulation begins with the initiation of infection threads (ITs) in root hairs. Though mutual recognition and early symbiotic signaling cascades in legumes are well understood, molecular mechanisms underlying bacterial infection processes and successive nodule organogenesis remain largely unexplored. We functionally investigated a novel pectate lyase enzyme, GmNPLa, and its transcriptional regulator GmPTF1a/b in soybean (Glycine max), where their regulatory roles in IT development and nodule formation were elucidated through investigation of gene expression patterns, bioinformatics analysis, biochemical verification of genetic interactions, and observation of phenotypic impacts in transgenic soybean plants. GmNPLa was specifically induced by rhizobium inoculation in root hairs. Manipulation of GmNPLa produced remarkable effects on IT and nodule formation. GmPTF1a/b displayed similar expression patterns as GmNPLa, and manipulation of GmPTF1a/b also severely influenced nodulation traits. LI soybeans with low nodulation phenotypes were nearly restored to HI nodulation level by complementation of GmNPLa and/or GmPTF1a. Further genetic and biochemical analysis demonstrated that GmPTF1a can bind to the E-box motif to activate transcription of GmNPLa, and thereby facilitate nodulation. Taken together, our findings potentially reveal novel mediation of cell wall gene expression involving the basic helix-loop-helix transcription factor GmPTF1a/b acts as a key early regulator of nodulation in soybean.
Collapse
Affiliation(s)
- Xiao Zhang
- Root Biology Center, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jia-Xin Chen
- Root Biology Center, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Wen-Ting Lian
- Root Biology Center, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Hui-Wen Zhou
- Root Biology Center, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Ying He
- Root Biology Center, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xin-Xin Li
- Root Biology Center, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Hong Liao
- Root Biology Center, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| |
Collapse
|
|
3
|
Msaddak A, Quiñones MA, Mars M, Pueyo JJ. The Beneficial Effects of Inoculation with Selected Nodule-Associated PGPR on White Lupin Are Comparable to Those of Inoculation with Symbiotic Rhizobia. PLANTS (BASEL, SWITZERLAND) 2023; 12:4109. [PMID: 38140436 PMCID: PMC10747367 DOI: 10.3390/plants12244109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 12/01/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023]
Abstract
Nodule endophytes and associated bacteria are non-symbiotic bacteria that colonize legume nodules. They accompany nodulating rhizobia and can form beneficial associations, as some of them are plant growth-promoting rhizobacteria (PGPR) that are able to promote germination and plant growth and increase tolerance to biotic and abiotic stress. White lupin (Lupinus albus) is a legume crop that is gaining relevance as a suitable alternative to soybean as a plant protein source. Eleven nodule-associated bacteria were isolated from white lupin nodules grown in a Tunisian soil. They belonged to the genera Rhizobium, Ensifer, Pseudomonas and Bacillus. Their plant growth-promoting (PGP) and enzymatic activities were tested in vitro. Strains Pseudomonas sp., L1 and L12, displayed most PGP activities tested, and were selected for in planta assays. Inoculation with strains L1 or L12 increased seed germination and had the same positive effects on all plant growth parameters as did inoculation with symbiotic Bradyrhizobium canariense, with no significant differences among treatments. Inoculation with efficient nitrogen-fixing rhizobia must compete with rhizobia present in the soil that sometimes nodulate efficiently but fix nitrogen poorly, leading to a low response to inoculation. In such cases, inoculation with highly effective PGPR might represent a feasible alternative to boost crop productivity.
Collapse
Affiliation(s)
- Abdelhakim Msaddak
- Department of Soil, Plant and Environmental Quality, Institute of Agricultural Sciences, ICA-CSIC, 28006 Madrid, Spain;
- Laboratory of Biodiversity and Valorization of Arid Areas Bioresources, BVBAA, Faculty of Sciences, University of Gabès, Erriadh, Zrig, Gabès 6072, Tunisia;
| | - Miguel A. Quiñones
- Department of Soil, Plant and Environmental Quality, Institute of Agricultural Sciences, ICA-CSIC, 28006 Madrid, Spain;
| | - Mohamed Mars
- Laboratory of Biodiversity and Valorization of Arid Areas Bioresources, BVBAA, Faculty of Sciences, University of Gabès, Erriadh, Zrig, Gabès 6072, Tunisia;
| | - José J. Pueyo
- Department of Soil, Plant and Environmental Quality, Institute of Agricultural Sciences, ICA-CSIC, 28006 Madrid, Spain;
| |
Collapse
|
|
4
|
Hossain MS, DeLaune PB, Gentry TJ. Microbiome analysis revealed distinct microbial communities occupying different sized nodules in field-grown peanut. Front Microbiol 2023; 14:1075575. [PMID: 36937276 PMCID: PMC10017544 DOI: 10.3389/fmicb.2023.1075575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 02/08/2023] [Indexed: 03/06/2023] Open
Abstract
Legume nodulation is the powerhouse of biological nitrogen fixation (BNF) where host-specific rhizobia dominate the nodule microbiome. However, other rhizobial or non-rhizobial inhabitants can also colonize legume nodules, and it is unclear how these bacteria interact, compete, or combinedly function in the nodule microbiome. Under such context, to test this hypothesis, we conducted 16S-rRNA based nodule microbiome sequencing to characterize microbial communities in two distinct sized nodules from field-grown peanuts inoculated with a commercial inoculum. We found that microbial communities diverged drastically in the two types of peanut nodules (big and small). Core microbial analysis revealed that the big nodules were inhabited by Bradyrhizobium, which dominated composition (>99%) throughout the plant life cycle. Surprisingly, we observed that in addition to Bradyrhizobium, the small nodules harbored a diverse set of bacteria (~31%) that were not present in big nodules. Notably, these initially less dominant bacteria gradually dominated in small nodules during the later plant growth phases, which suggested that native microbial communities competed with the commercial inoculum in the small nodules only. Conversely, negligible or no competition was observed in the big nodules. Based on the prediction of KEGG pathway analysis for N and P cycling genes and the presence of diverse genera in the small nodules, we foresee great potential of future studies of these microbial communities which may be crucial for peanut growth and development and/or protecting host plants from various biotic and abiotic stresses.
Collapse
Affiliation(s)
- Md Shakhawat Hossain
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, United States
- Texas A&M AgriLife Research, College Station, TX, United States
| | | | - Terry J Gentry
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, United States
- Texas A&M AgriLife Research, College Station, TX, United States
| |
Collapse
|
|
5
|
Ghantasala S, Roy Choudhury S. Nod factor perception: an integrative view of molecular communication during legume symbiosis. PLANT MOLECULAR BIOLOGY 2022; 110:485-509. [PMID: 36040570 DOI: 10.1007/s11103-022-01307-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Compatible interaction between rhizobial Nod factors and host receptors enables initial recognition and signaling events during legume-rhizobia symbiosis. Molecular communication is a new paradigm of information relay, which uses chemical signals or molecules as dialogues for communication and has been witnessed in prokaryotes, plants as well as in animal kingdom. Understanding this fascinating relay of signals between plants and rhizobia during the establishment of a synergistic relationship for biological nitrogen fixation represents one of the hotspots in plant biology research. Predominantly, their interaction is initiated by flavonoids exuding from plant roots, which provokes changes in the expression profile of rhizobial genes. Compatible interactions promote the secretion of Nod factors (NFs) from rhizobia, which are recognised by cognate host receptors. Perception of NFs by host receptors initiates the symbiosis and ultimately leads to the accommodation of rhizobia within root nodules via a series of mutual exchange of signals. This review elucidates the bacterial and plant perspectives during the early stages of symbiosis, explicitly emphasizing the significance of NFs and their cognate NF receptors.
Collapse
Affiliation(s)
- Swathi Ghantasala
- Department of Biology, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, Andhra Pradesh, 517507, India
| | - Swarup Roy Choudhury
- Department of Biology, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, Andhra Pradesh, 517507, India.
| |
Collapse
|
|
6
|
Role of Nodulation-Enhancing Rhizobacteria in the Promotion of Medicago sativa Development in Nutrient-Poor Soils. PLANTS 2022; 11:plants11091164. [PMID: 35567168 PMCID: PMC9099972 DOI: 10.3390/plants11091164] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/15/2022] [Accepted: 04/24/2022] [Indexed: 11/17/2022]
Abstract
Legumes are usually used as cover crops to improve soil quality due to the biological nitrogen fixation that occurs due to the interaction of legumes and rhizobia. This symbiosis can be used to recover degraded soils using legumes as pioneer plants. In this work, we screened for bacteria that improve the legume–rhizobia interaction in nutrient-poor soils. Fourteen phosphate solubilizer-strains were isolated, showing at least three out of the five tested plant growth promoting properties. Furthermore, cellulase, protease, pectinase, and chitinase activities were detected in three of the isolated strains. Pseudomonas sp. L1, Chryseobacterium soli L2, and Priestia megaterium L3 were selected to inoculate seeds and plants of Medicago sativa using a nutrient-poor soil as substrate under greenhouse conditions. The effects of the three bacteria individually and in consortium showed more vigorous plants with increased numbers of nodules and a higher nitrogen content than non-inoculated plants. Moreover, bacterial inoculation increased plants’ antioxidant activities and improved their development in nutrient-poor soils, suggesting an important role in the stress mechanisms of plants. In conclusion, the selected strains are nodulation-enhancing rhizobacteria that improve leguminous plants growth and nodulation in nutrient-poor soils and could be used by sustainable agriculture to promote plants’ development in degraded soils.
Collapse
|
|
7
|
Costa SR, Ng JLP, Mathesius U. Interaction of Symbiotic Rhizobia and Parasitic Root-Knot Nematodes in Legume Roots: From Molecular Regulation to Field Application. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:470-490. [PMID: 33471549 DOI: 10.1094/mpmi-12-20-0350-fi] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Legumes form two types of root organs in response to signals from microbes, namely, nodules and root galls. In the field, these interactions occur concurrently and often interact with each other. The outcomes of these interactions vary and can depend on natural variation in rhizobia and nematode populations in the soil as well as abiotic conditions. While rhizobia are symbionts that contribute fixed nitrogen to their hosts, parasitic root-knot nematodes (RKN) cause galls as feeding structures that consume plant resources without a contribution to the plant. Yet, the two interactions share similarities, including rhizosphere signaling, repression of host defense responses, activation of host cell division, and differentiation, nutrient exchange, and alteration of root architecture. Rhizobia activate changes in defense and development through Nod factor signaling, with additional functions of effector proteins and exopolysaccharides. RKN inject large numbers of protein effectors into plant cells that directly suppress immune signaling and manipulate developmental pathways. This review examines the molecular control of legume interactions with rhizobia and RKN to elucidate shared and distinct mechanisms of these root-microbe interactions. Many of the molecular pathways targeted by both organisms overlap, yet recent discoveries have singled out differences in the spatial control of expression of developmental regulators that may have enabled activation of cortical cell division during nodulation in legumes. The interaction of legumes with symbionts and parasites highlights the importance of a comprehensive view of root-microbe interactions for future crop management and breeding strategies.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
Collapse
Affiliation(s)
- Sofia R Costa
- CBMA - Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Jason Liang Pin Ng
- Division of Plant Sciences, Research School of Biology, Australian National University, Canberra ACT 2601, Australia
| | - Ulrike Mathesius
- Division of Plant Sciences, Research School of Biology, Australian National University, Canberra ACT 2601, Australia
| |
Collapse
|
|
8
|
Paço A, da-Silva JR, Torres DP, Glick BR, Brígido C. Exogenous ACC Deaminase Is Key to Improving the Performance of Pasture Legume-Rhizobial Symbioses in the Presence of a High Manganese Concentration. PLANTS 2020; 9:plants9121630. [PMID: 33255180 PMCID: PMC7760732 DOI: 10.3390/plants9121630] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/20/2020] [Accepted: 11/22/2020] [Indexed: 02/06/2023]
Abstract
Manganese (Mn) toxicity is a very common soil stress around the world, which is responsible for low soil fertility. This manuscript evaluates the effect of the endophytic bacterium Pseudomonas sp. Q1 on different rhizobial-legume symbioses in the absence and presence of Mn toxicity. Three legume species, Cicer arietinum (chickpea), Trifolium subterraneum (subterranean clover), and Medicago polymorpha (burr medic) were used. To evaluate the role of 1-aminocyclopropane-1-carboxylate (ACC) deaminase produced by strain Q1 in these interactions, an ACC deaminase knockout mutant of this strain was constructed and used in those trials. The Q1 strain only promoted the symbiotic performance of Rhizobium leguminosarum bv. trifolii ATCC 14480T and Ensifer meliloti ATCC 9930T, leading to an increase of the growth of their hosts in both conditions. Notably, the acdS gene disruption of strain Q1 abolished the beneficial effect of this bacterium as well as causing this mutant strain to act deleteriously in those specific symbioses. This study suggests that the addition of non-rhizobia with functional ACC deaminase may be a strategy to improve the pasture legume–rhizobial symbioses, particularly when the use of rhizobial strains alone does not yield the expected results due to their difficulty in competing with native strains or in adapting to inhibitory soil conditions.
Collapse
Affiliation(s)
- Ana Paço
- MED—Mediterranean Institute for Agriculture, Environment and Development, Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (A.P.); (J.R.d.-S.); (D.P.T.)
| | - José Rodrigo da-Silva
- MED—Mediterranean Institute for Agriculture, Environment and Development, Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (A.P.); (J.R.d.-S.); (D.P.T.)
| | - Denise Pereira Torres
- MED—Mediterranean Institute for Agriculture, Environment and Development, Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (A.P.); (J.R.d.-S.); (D.P.T.)
| | - Bernard R. Glick
- Department of Biology, University of Waterloo, Waterloo, ON N2L 3G1, Canada;
| | - Clarisse Brígido
- MED—Mediterranean Institute for Agriculture, Environment and Development, Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal; (A.P.); (J.R.d.-S.); (D.P.T.)
- Correspondence: ; Tel.: +351-266-760-878
| |
Collapse
|
|
9
|
Ayuso-Calles M, García-Estévez I, Jiménez-Gómez A, Flores-Félix JD, Escribano-Bailón MT, Rivas R. Rhizobium laguerreae Improves Productivity and Phenolic Compound Content of Lettuce ( Lactuca sativa L.) under Saline Stress Conditions. Foods 2020; 9:foods9091166. [PMID: 32847018 PMCID: PMC7555320 DOI: 10.3390/foods9091166] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/19/2020] [Accepted: 08/20/2020] [Indexed: 11/27/2022] Open
Abstract
Lettuce (Lactuca sativa L.) is a widely consumed horticultural species. Its significance lies in a high polyphenolic compound content, including phenolic acids and flavonols. In this work, we have probed the ability of Rhizobium laguerreae HUTR05 to promote lettuce growth, under in vitro and greenhouse conditions (both non-saline and saline conditions). This strain has shown several in vitro plant growth promotion mechanisms, as well as capacity to colonize lettuce seedlings roots. We have analyzed the effect of the rhizobacterium inoculation on mineral and bioactive compounds in lettuce, under greenhouse conditions, and found a rise in the content of certain phenolic acids and flavonoids, such as derivatives of caffeoyl acid and quercetin. The genome analysis of the strain has shown the presence of genes related to plant growth-promoting rhizobacteria (PGPR) mechanisms, defense from saline stress, and phenolic compound metabolism (such as naringenin-chalcone synthase or phenylalanine aminotransferase).
Collapse
Affiliation(s)
- Miguel Ayuso-Calles
- Departamento de Microbiología y Genética, Universidad de Salamanca, Edificio Departamental de Biología, 37007 Salamanca, Spain; (M.A.-C.); (J.D.F.-F.); (R.R.)
- Spanish-Portuguese Institute for Agricultural Research (CIALE), 37185 Salamanca, Spain
| | - Ignacio García-Estévez
- Grupo de Investigación en Polifenoles (GIP), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Farmacia, Universidad de Salamanca, 37007 Salamanca, Spain; (I.G.-E.); (M.T.E.-B.)
| | - Alejandro Jiménez-Gómez
- Departamento de Microbiología y Genética, Universidad de Salamanca, Edificio Departamental de Biología, 37007 Salamanca, Spain; (M.A.-C.); (J.D.F.-F.); (R.R.)
- Spanish-Portuguese Institute for Agricultural Research (CIALE), 37185 Salamanca, Spain
- Correspondence: ; Tel.: +34-923294500 (ext. 1919)
| | - José D. Flores-Félix
- Departamento de Microbiología y Genética, Universidad de Salamanca, Edificio Departamental de Biología, 37007 Salamanca, Spain; (M.A.-C.); (J.D.F.-F.); (R.R.)
- Spanish-Portuguese Institute for Agricultural Research (CIALE), 37185 Salamanca, Spain
| | - M. Teresa Escribano-Bailón
- Grupo de Investigación en Polifenoles (GIP), Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Farmacia, Universidad de Salamanca, 37007 Salamanca, Spain; (I.G.-E.); (M.T.E.-B.)
| | - Raúl Rivas
- Departamento de Microbiología y Genética, Universidad de Salamanca, Edificio Departamental de Biología, 37007 Salamanca, Spain; (M.A.-C.); (J.D.F.-F.); (R.R.)
- Spanish-Portuguese Institute for Agricultural Research (CIALE), 37185 Salamanca, Spain
- Associated Unit University of Salamanca CSIC (IRNASA), 37008 Salamanca, Spain
| |
Collapse
|