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Krishnappa C, Balamurugan A, Velmurugan S, Kumar S, Sampathrajan V, Kundu A, Javed M, Chouhan V, Ganesan P, Kumar A. Rice foliar-adapted Pantoea species: Promising microbial biostimulants enhancing rice resilience against foliar pathogens, Magnaporthe oryzae and Xanthomonas oryzae pv. oryzae. Microb Pathog 2024; 186:106445. [PMID: 37956936 DOI: 10.1016/j.micpath.2023.106445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/04/2023] [Accepted: 11/06/2023] [Indexed: 11/21/2023]
Abstract
Foliar fungal blast and bacterial leaf blight have significant impacts on rice production, and their management through host resistance and agrochemicals has proven inadequate. To achieve their sustainable management, innovative approaches like leveraging the foliar microbiome, which collaborates with plants and competes against pathogens, are essential. In our study, we isolated three Pantoea strains (P. agglomerans Os-Ep-PPA-1b, P. vagans Os-Ep-PPA-3b, and P. deleyi Os-Ep-VPA-9a) from the rice phylloplane. These isolates exhibited antimicrobial action through their metabolome and volatilome, while also promoting rice growth. Our analysis, using Gas Chromatography-Mass Spectrometry (GC-MS), revealed the presence of various antimicrobial compounds such as esters and fatty acids produced by these Pantoea isolates. Inoculating rice seedlings with P. agglomerans and P. vagans led to increased root and shoot growth. Additionally, bacterized seedlings displayed enhanced immunocompetence, as evidenced by upregulated expressions of defense genes (OsEDS1, OsFLS2, OsPDF2.2, OsACO4, OsICS OsPR1a, OsNPR1.3, OsPAD4, OsCERK1.1), along with heightened activities of defense enzymes like Polyphenol Oxidase and Peroxidase. These plants also exhibited elevated levels of total phenols. In field trials, the Pantoea isolates contributed to improved plant growth, exemplified by increased flag-leaf length, panicle number, and grains per panicle, while simultaneously reducing the incidence of chaffy grains. Hypersensitivity assays performed on a model plant, tobacco, confirmed the non-pathogenic nature of these Pantoea isolates. In summary, our study underscores the potential of Pantoea bacteria in combatting rice foliar diseases. Coupled with their remarkable growth-promoting and biostimulant capabilities, these findings position Pantoea as promising agents for enhancing rice cultivation.
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Affiliation(s)
- Charishma Krishnappa
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Alexander Balamurugan
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Shanmugam Velmurugan
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Shanu Kumar
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Vellaikumar Sampathrajan
- Agricultural College & Research Institute, Tamil Nadu Agricultural University, Madurai, 625104, India
| | - Aditi Kundu
- Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Mohammed Javed
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Vinod Chouhan
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Prakash Ganesan
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India
| | - Aundy Kumar
- Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012, India.
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Lyu YZ, Jiang H, Sun HN, Yang Y, Chao Y, Huang LB, Dong XY. Lipidomic and comparative transcriptomic analysis of fatty acid synthesis pathway in Carya illinoinensis embryo. TREE PHYSIOLOGY 2023; 43:1675-1690. [PMID: 37171624 DOI: 10.1093/treephys/tpad061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 04/03/2023] [Accepted: 05/08/2023] [Indexed: 05/13/2023]
Abstract
Pecan (Carya illinoinensis (Wagenh.) K. Koch) is an important oilseed nut and is rich in fatty acids (FAs) and flavonols. Pecan FA has significantly edible, industrial and clinical value. To investigate the dynamic patterns and compositions of FA, and the molecular mechanism that controls FA accumulation in pecan, lipidomic and transcriptomic analyses were performed to determine lipid profiles and gene expression in pecan's FA biosynthesis pathway. In the present study, compared with cultivars 'Caddo' and 'Y-01', 'Mahan' formed larger and heavier embryos and accumulated higher oil content. Lipidomic analysis showed that FA and (O-acyl)-1-hydroxy FA contents were higher in 'Mahan' at the mature stage. Based on full-length and comparative RNA-Seq, differential expression gene enrichment analysis revealed that many functional genes participated in the pathways of 'fatty acid biosynthesis', 'fatty acid metabolism' and 'linoleic acid metabolism'. High FA accumulation model from 'Mahan' demonstrated that key enzyme-encoding genes played an important role in regulating FA biosynthesis. Co-expression module analysis indicated that several transcription factors (TFs; MYB, TCP, bHLH, Dof, ERF, NAC) were involved in FA accumulation by regulating the expression of functional genes, and real-time quantitative PCR verification proved that these TFs had a high correlation with the pecan FA accumulation pattern. These findings provided an insight into the molecular mechanism of FA accumulation in C. illinoinensis embryo, which contributes to pecan oil yielding and pecan molecular breeding.
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Affiliation(s)
- Yun-Zhou Lyu
- Institute of Landscape Trees and Flowers, Jiangsu Academy of Forestry, Nanjing 211153, China
| | - Hao Jiang
- Institute of Landscape Trees and Flowers, Jiangsu Academy of Forestry, Nanjing 211153, China
| | - Hai-Nan Sun
- Institute of Landscape Trees and Flowers, Jiangsu Academy of Forestry, Nanjing 211153, China
| | - Yong Yang
- Institute of Landscape Trees and Flowers, Jiangsu Academy of Forestry, Nanjing 211153, China
| | - Yang Chao
- Changzhou Golden Land Agriculture and Animal Husbandry Technology Service Co., Ltd, Changzhou 213139, China
| | - Li-Bin Huang
- Institute of Landscape Trees and Flowers, Jiangsu Academy of Forestry, Nanjing 211153, China
| | - Xiao-Yun Dong
- Institute of Landscape Trees and Flowers, Jiangsu Academy of Forestry, Nanjing 211153, China
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Su YC, Cheng MJ, Lin WY, Weng JR. Natural Products from Littoral Plants of Ficus septica. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03897-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Transcriptomic and Metabolomic Analysis Unravels the Molecular Regulatory Mechanism of Fatty Acid Biosynthesis in Styrax tonkinensis Seeds under Methyl Jasmonate Treatment. Int J Mol Sci 2022; 23:ijms23116190. [PMID: 35682867 PMCID: PMC9181076 DOI: 10.3390/ijms23116190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 05/27/2022] [Accepted: 05/30/2022] [Indexed: 12/04/2022] Open
Abstract
As the germ of a highly productive oil tree species, Styrax tonkinensis seeds have great potential to produce biodiesel and they have marvelous fatty acid (FA) composition. In order to explore the molecular regulatory mechanism of FA biosynthesis in S. tonkinensis seeds after methyl jasmonate (MJ) application, transcriptomic and metabolomic techniques were adopted so as to dissect the genes that are related to FA biosynthesis and their expression levels, as well as to discover the major FA concentration and composition. The results revealed that 200 μmol/L of MJ (MJ200) increased the crude fat (CF) mass fraction and generated the greatest impact on CF accumulation at 70 days after flowering. Twenty FAs were identified, among which palmitic acid, oleic acid, linoleic acid and linolenic acid were the major FAs, and the presence of MJ200 affected their concentrations variously. MJ200 could enhance FA accumulation through elevating the activity of enzymes that are related to FA synthesis. The number of differentially expressed genes increased with the seeds’ development in general. Fatty acid biosynthesis, the biosynthesis of unsaturated fatty acid, fatty acid elongation and glycerolipid metabolism were the main lipid metabolism pathways that were found to be involved. The changes in the expression levels of EAR, KAR, accA, accB and SAD2 were consistent with the changes in the CF mass fraction, indicating that they are important genes in the FA biosynthesis of S. tonkinensis seeds and that MJ200 promoted their expression levels. In addition, bZIP (which was screened by weighted correlation network analysis) also created significant impacts on FA biosynthesis. Our research has provided a basis for further studies on FA biosynthesis that is regulated by MJ200 at the molecular level and has helped to clarify the functions of key genes in the FA metabolic pathway in S. tonkinensis seeds.
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Anh NQ, Thanh HD, Yen TT, Anh DH, Schmitz Oliver J, Viet PH. Characterization of volatile components from ethyl acetate extract of Stixis suaveolens(Roxb.) by comprehensive two-dimensional gas chromatography hyphenated with a time-of-flight mass spectrometer. VIETNAM JOURNAL OF CHEMISTRY 2020. [DOI: 10.1002/vjch.201900190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ngo Quoc Anh
- Institute of Chemistry, Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet, Cau Giay Hanoi 10000 Viet Nam
| | - Hoang Duc Thanh
- Centre for Environmental Technology and Sustainable Development (CETASD), VNU University of Science, Vietnam National University (VNU); Hanoi 10000 Viet Nam
| | - Tran Thi Yen
- Institute of Chemistry, Vietnam Academy of Science and Technology; 18 Hoang Quoc Viet, Cau Giay Hanoi 10000 Viet Nam
| | - Duong Hong Anh
- Centre for Environmental Technology and Sustainable Development (CETASD), VNU University of Science, Vietnam National University (VNU); Hanoi 10000 Viet Nam
- VNU Key Laboratory of Analytical Chemistry for Environmental Quality and Food Safety Control (KLATEFOS)), VNU University of Science, Vietnam National University (VNU); Hanoi 10000 Viet Nam
| | - J. Schmitz Oliver
- Faculty of Chemistry, Applied Analytical Chemistry, University of Duisburg-Essen, Campus Essen; S05 T01 B32Universitaetsstr. 5 45141 Essen Germany
| | - Pham Hung Viet
- Centre for Environmental Technology and Sustainable Development (CETASD), VNU University of Science, Vietnam National University (VNU); Hanoi 10000 Viet Nam
- VNU Key Laboratory of Analytical Chemistry for Environmental Quality and Food Safety Control (KLATEFOS)), VNU University of Science, Vietnam National University (VNU); Hanoi 10000 Viet Nam
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