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Mondal B, Mukherjee A, Mazumder M, De A, Ghosh S, Basu D. Inducible expression of truncated NAC62 provides tolerance against Alternaria brassicicola and imparts developmental changes in Indian mustard. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 324:111425. [PMID: 36007630 DOI: 10.1016/j.plantsci.2022.111425] [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: 05/10/2022] [Revised: 07/19/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Indian mustard (Brassica juncea) faces significant yield loss due to the 'Black Spot Disease,' caused by a fungus Alternaria brassicicola. In plants, NAC transcription factors (NAC TFs) are known for their roles in development and stress tolerance. One such NAC TF, NAC 62, was induced during A. brassicicola challenge in Sinapis alba, a non-host resistant plant against this fungus. Sequence analyses of BjuNAC62 from B. juncea showed that it belonged to the membrane-bound class of transcription factors. Gene expression study revealed differential protein processing of NAC62 between B. juncea and S. alba on pathogen challenge. Furthermore, NAC62 processing to 25 kDa protein was found to be unique to the resistant plant during pathogenesis. Conditional expression of BjuNAC62ΔC, which lacks its transmembrane domain, in B. juncea showed improved tolerance to A. brassicicola. BjuNAC62ΔC processing to 25 kDa product was also observed in tolerant transgenic plants. Additionally, transgenic plants showed induced expression of genes associated with defense-related phytohormone signaling pathways on pathogen challenge. Again, altered phenotypes suggest a possible developmental effect of BjuNAC62∆C in transgenic plants. The overall results suggest that the processing of BjuNAC62 might be playing a crucial role in resistance response against Black Spot disease by modulating defense-associated genes.
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Affiliation(s)
- Banani Mondal
- Division of Plant Biology, Bose Institute, P-1/12, CIT Rd, Scheme VIIM, Kolkata, West Bengal 700054, India.
| | - Amrita Mukherjee
- Division of Plant Biology, Bose Institute, P-1/12, CIT Rd, Scheme VIIM, Kolkata, West Bengal 700054, India
| | - Mrinmoy Mazumder
- Division of Plant Biology, Bose Institute, P-1/12, CIT Rd, Scheme VIIM, Kolkata, West Bengal 700054, India
| | - Aishee De
- Division of Plant Biology, Bose Institute, P-1/12, CIT Rd, Scheme VIIM, Kolkata, West Bengal 700054, India
| | - Swagata Ghosh
- Division of Plant Biology, Bose Institute, P-1/12, CIT Rd, Scheme VIIM, Kolkata, West Bengal 700054, India.
| | - Debabrata Basu
- Division of Plant Biology, Bose Institute, P-1/12, CIT Rd, Scheme VIIM, Kolkata, West Bengal 700054, India.
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De A, Maity A, Mazumder M, Mondal B, Mukherjee A, Ghosh S, Ray P, Polley S, Dastidar SG, Basu D. Overexpression of LYK4, a lysin motif receptor with non-functional kinase domain, enhances tolerance to Alternaria brassicicola and increases trichome density in Brassica juncea. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 309:110953. [PMID: 34134846 DOI: 10.1016/j.plantsci.2021.110953] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/17/2021] [Accepted: 05/20/2021] [Indexed: 06/12/2023]
Abstract
Lysin motif receptor-like kinases (LYKs) are involved in the recognition of chitin and activation of plant immune response. In this study, we found LYK4 to be strongly induced in resistant Sinapis alba compared with susceptible Brassica juncea on challenge with Alternaria brassicicola. In silico analysis and in vitro kinase assay revealed that despite the presence of canonical protein kinase fold, B.juncea LYK4 (BjLYK4) lacks several key residues of a prototype protein kinase which renders it catalytically inactive. Transient expression analysis confirmed that fluorescently tagged BjLYK4 localizes specifically to the plasma membrane. Overexpression (OE) of BjLYK4 in B. juncea enhanced tolerance against A. brassicicola. Interestingly, the OE lines also exhibited a novel trichome dense phenotype and increased jasmonic acid (JA) responsiveness. We further showed that many chitin responsive WRKY transcription factors and JA biosynthetic genes were strongly induced in the OE lines on challenge with the pathogen. Moreover, several JA inducible trichome developmental genes constituting the WD-repeat/bHLH/MYB activator complex were also upregulated in the OE lines compared with vector control and RNA interference line. These results suggest that BjLYK4 plays an essential role in chitin-dependent activation of defense response and chitin independent trichome development likely by influencing the JA signaling pathway.
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Affiliation(s)
- Aishee De
- Division of Plant Biology, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Atanu Maity
- Division of Bioinformatics, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Mrinmoy Mazumder
- Department of Biological Sciences, National University of Singapore (NUS), Singapore, 119077.
| | - Banani Mondal
- Division of Plant Biology, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Amrita Mukherjee
- Division of Plant Biology, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Swagata Ghosh
- Division of Plant Biology, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Pranita Ray
- Department of Biophysics, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Smarajit Polley
- Department of Biophysics, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Shubhra Ghosh Dastidar
- Division of Bioinformatics, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
| | - Debabrata Basu
- Division of Plant Biology, Bose Institute, P1/12 C.I.T. Scheme-VIIM, Kankurgachi, Kolkata, 700054, India.
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Mukherjee A, Mazumder M, Jana J, Srivastava AK, Mondal B, De A, Ghosh S, Saha U, Bose R, Chatterjee S, Dey N, Basu D. Enhancement of ABA Sensitivity Through Conditional Expression of the ARF10 Gene in Brassica juncea Reveals Fertile Plants with Tolerance Against Alternaria brassicicola. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2019; 32:1429-1447. [PMID: 31184524 DOI: 10.1094/mpmi-05-19-0132-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Concomitant increase of auxin-responsive factors ARF16 and ARF17, along with enhanced expression of ARF10 in resistant Sinapis alba compared with that in susceptible Brassica juncea upon challenge with Alternaria brassicicola, revealed that abscisic acid (ABA)-auxin crosstalk is a critical factor for resistance response. Here, we induced the ABA response through conditional expression of ARF10 in B. juncea using the A. brassicicola-inducible GH3.3 promoter. Induced ABA sensitivity caused by conditional expression of ARF10 in transgenic B. juncea resulted in tolerance against A. brassicicola and led to enhanced expression of several ABA-responsive genes without affecting the auxin biosynthetic gene expression. Compared with ABI3 and ABI4, ABI5 showed maximum upregulation in the most tolerant transgenic lines upon pathogen challenge. Moreover, elevated expression of ARF10 by different means revealed a direct correlation between ARF10 expression and the induction of ABI5 protein in B. juncea. Through in vitro DNA-protein experiments and chromosome immunoprecipitation using the ARF10 antibody, we demonstrated that ARF10 interacts with the auxin-responsive elements of the ABI5 promoter. This suggests that ARF10 may function as a modulator of ABI5 to induce ABA sensitivity and mediate the resistance response against A. brassicicola.
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Affiliation(s)
- Amrita Mukherjee
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
| | - Mrinmoy Mazumder
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
| | - Jagannath Jana
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
- Institut Curie, CNRS UMR 3348, Orsay, France
| | - Archana Kumari Srivastava
- Plant and Microbial biotechnology, Institute of Life Sciences (ILS), NALCO Square, Bhubaneswar, 751023, Odisha, India
| | - Banani Mondal
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
| | - Aishee De
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
| | - Swagata Ghosh
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
| | - Upala Saha
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
- Department of Botany, Sister Nivedita Government General Degree College for Girls, 20B Judge's Court Road, Hastings House, Alipore, Kolkata, 700027, West Bengal, India
| | - Rahul Bose
- Department of Genetics, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, West Bengal, India
| | - Subhrangsu Chatterjee
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
| | - Nrisingha Dey
- Plant and Microbial biotechnology, Institute of Life Sciences (ILS), NALCO Square, Bhubaneswar, 751023, Odisha, India
| | - Debabrata Basu
- Division of Plant Biology, Bose Institute, Centenary Campus P-1/12 C.I.T., Scheme-VIIM Kolkata, 700054, West Bengal, India
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Fatima U, Bhorali P, Borah S, Senthil-Kumar M. Perspectives on the utilization of resistance mechanisms from host and nonhost plants for durable protection of Brassica crops against Alternaria blight. PeerJ 2019; 7:e7486. [PMID: 31579565 PMCID: PMC6766370 DOI: 10.7717/peerj.7486] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 07/16/2019] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Alternaria brassicae, the causal organism of Alternaria blight, is a necrotroph infecting crops of the Brassicaceae family at all growth stages. To circumvent this problem, several disease management strategies are being used in the field, and disease-resistant varieties have also been developed. However, no strategy has proven completely successful, owing to the high variability in virulence among A. brassicae isolates, which causes a diverse spectrum of symptoms. Nonhost resistance (NHR) is a robust and broad-spectrum defense mechanism available in plants, and the exploitation of gene pools from plant species that are nonhost to A. brassicae could serve as novel sources of resistance. METHODOLOGY We searched the literature using key words relevant to this study in various search engines, such as PubMed, Web of Science, and Google Scholar, as well as certain journal websites. The literature was retrieved, sorted, and mined to extract data pertinent to the present review. RESULTS In this review, we have comprehensively covered the recent progress made in developing Alternaria blight resistance in Brassica crops by exploiting host germplasm. We also enumerate the potential NHR sources available for A. brassicae and the NHR layers possibly operating against this pathogen. In addition, we propose different strategies for identifying NHR-related genes from nonhost plants and testing their relevance in imparting broad-spectrum resistance when transferred to host plants. CONCLUSION This review will help broaden the current knowledge base pertaining to the resistance sources available in host germplasm, the exploitation of NHR mechanisms, and their applications in protecting Brassica crops from Alternaria blight. The insights might also be applicable to a wider repertoire of plant pathogens.
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Affiliation(s)
- Urooj Fatima
- National Institute of Plant Genome Research, New Delhi, Delhi, India
| | - Priyadarshini Bhorali
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, India
| | - Sudarshana Borah
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, India
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