Skip to main navigation menu Skip to main content Skip to site footer

Review Articles

Vol. 13 No. sp1 (2026): Recent Advances in Agriculture

Tracking sources and methods of gene transfer for emerging and tricky disease rice false smut (RFS)

DOI
https://doi.org/10.14719/pst.8773
Submitted
9 April 2025
Published
04-02-2026

Abstract

Rice false smut (RFS), caused by Ustilaginoidea virens, is a destructive emerging fungal disease that significantly impacts rice production spots globally. The pathogen primarily infects rice at the flowering stage, leading to the development of greenish-brown smut balls on panicles, which significantly reduce grain yield, quality and seed health. Managing this disease has become increasingly difficult due to the pathogen’s adaptability and resistance to commonly used fungicides. A major factor contributing to the persistence of U. virens is the horizontal transfer of resistance genes, allowing the pathogen to acquire genetic material from other microorganisms or environmental sources. This process enhances its virulence and complicates disease control. Understanding the molecular mechanisms behind gene transfer, such as backcrossing and marker-assisted selection, is crucial in developing effective strategies against false smut. Genetic diversity within U. virens populations further challenges disease management and influences the effectiveness of rice breeding programs. This article is compliance of the multidisciplinary approaches traditional, modern/integrated breeding techniques and crop protection strategies to combat this threat. Advanced research in pathogen genomics and resistant rice varieties can help better understand mechanisms, sources of resistance and mitigate the impact of false smut and sustain rice productivity. Strengthening disease surveillance and resistance breeding efforts will be key in reducing future outbreaks.

References

  1. 1. USDA. Global Production. [Accessed December 5, 2025]. https://www.fas.usda.gov/data/production/commodity/0422110
  2. 2. Ansari M, Shaheen T, Bukhari SA, Husnain T. Genetic improvement of rice for biotic and abiotic stress tolerance. Tur J Bot. 2015;39:911–9. https://doi.org/10.3906/bot-1503-47
  3. 3. Sunani SK, Koti PS, Sunitha NC, Choudhary M, Jeevan B, Anilkumar C, et al. Ustilaginoidea virens, an emerging pathogen of rice: the dynamic interplay between the pathogen virulence strategies and host defense. Planta. 2024;260:92. https://doi.org/10.1007/s00425-024-04523-x
  4. 4. Long W, Yuan Z, Fan F, Dan D, Pan G, Sun H, et al. Genome-wide association analysis of resistance to rice false smut. Mol Breed. 2020;40(5):46. https://doi.org/10.1007/s11032-020-01130-y
  5. 5. Reza G. Reducing copper-based fungicide use in organic crop production systems. In: Cooper J, Niggli U, Leifert C, editors. Handbook of organic food safety and quality. Woodhead Publishing; 2007. p. 392-412. https://doi.org/10.1533/9781845693411.3.392
  6. 6. Khanal S, Gaire SP, Zhou X. Kernel smut and false smut: the old-emerging diseases of rice—a review. Phytopathology. 2022;113(6). https://doi.org/10.1094/PHYTO-06-22-0226-RVW
  7. 7. Qiu J, Lu F, Wang H, Xie J, Wang C, Liu Z, et al. A candidate gene for the determination of rice resistant to rice false smut. Mol Breed. 2020;40:105. https://doi.org/10.1007/s11032-020-01186-w
  8. 8. Shivappa R, Navadagi DB, Baite MS, Yadav MK, Rathinam PS, Umapathy K, et al. Emerging minor diseases of rice in India: losses and management strategies. In: Huang M, editor. Integrative advances in rice research. IntechOpen; 2021. https://doi.org/10.5772/intechopen.99898
  9. 9. Tang Y, Jin J, Hu D, Yong M, Xu Y, He L. Elucidation of the infection process of Ustilaginoidea virens in rice spikelets. Plant Pathol. 2012;62(1):1-8. https://doi.org/10.1111/j.1365-3059.2012.02629.x
  10. 10. Leharwan M, Kumar TA. Advances in false smut of rice and its integrated disease management: a review. Agric Rev. 2023;44(1):78-83. https://doi.org/10.18805/ag.R-2131
  11. 11. Duraisamy L, Madamsetty SP, Vellaichamy P, Donempudi K, Banda S, Singh R, et al. Geographic distribution of false smut disease of rice in India and efficacy of selected fungicides. Int J Pest Manag. 2018;65(2):177–85. https://doi.org/10.1080/09670874.2018.1494865
  12. 12. Qiu J, Lu F, Wang H, Xie J, Wang C, Liu Z, et al. A candidate gene for the determination of rice resistant to rice false smut. Mol Breed. 2020;40:105. https://doi.org/10.1007/s11032-020-01186-w
  13. 13. Wang W, Fan J, Jeya JMJ. Rice false smut: an increasing threat to grain yield and quality. In: Jia Y, editor. Protecting rice grains in the post-genomic era. IntechOpen; 2019. https://doi.org/10.5772/intechopen.84862
  14. 14. Danso OA, Zheng T, Titriku JK, Appiah C, Xiang X, Kandhro AG, et al. The role of genetic resistance in rice disease management. Int J Mol Sci. 2025;26(3):956. https://doi.org/10.3390/ijms26030956
  15. 15. Dhua U, Dhua SR, Sahu RK. Precise disease severity assessment for false smut disease of rice. J Phytopathol. 2015;163(11–12):931-40. https://doi.org/10.1111/jph.12395
  16. 16. Fan J, Yang J, Wang Y, Li G, Li Y, Huang F, et al. Current understanding on Villosiclava virens, a unique flower-infecting fungus causing rice false smut disease. Mol Plant Pathol. 2015;17(9):1321–30. https://doi.org/10.1111/mpp.12362
  17. 17. Sharma P, Khadka RB, Baidya S. Evaluation of fungicides to manage rice false smut (Ustilaginoidea virens) in the hills of Nepal. Heliyon. 2024;10(14):e34151. https://doi.org/10.1016/j.heliyon.2024.e34151
  18. 18. Gilbert GS, Parker IM. Disease management. In: The evolutionary ecology of plant disease. Oxford; 2023. https://doi.org/10.1093/oso/9780198797876.001.0001
  19. 19. Brooks SA, Anders MM, Yeater KM. Influences from long-term crop rotation, soil tillage and fertility on severity of rice grain smuts. Plant Dis. 2011;95:990–6. https://doi.org/10.1094/PDIS-09-10-0689
  20. 20. Elsharkawy MM. Control of Ustilaginoidea virens, the causal agent of rice false smut disease in Egypt. Academia. 2014. https://www.academia.edu/30003164/Control_of_Ustilaginoidea_virens_the_Causal_Agent_of_Rice_False_Smut_Disease_in_Egypt
  21. 21. Ashizawa T, Takahashi M, Arai M, Arie T. Rice false smut pathogen Ustilaginoidea virens invades through small gap at apex of spikelet. J Gen Plant Pathol. 2012;78:255–9. https://doi.org/10.1007/s10327-012-0389-3
  22. 22. Jiehui S, Yan W, Linrong C, Sijie Z, Chuan N, Di Z, et al. Higher relative humidity and moderate temperatures increase rice false smut severity. Food Energy Secur. 2021;11(1):e323. https://doi.org/10.1002/fes3.323
  23. 23. An YN, Murugesan C, Choi H, Kim KD, Chun S. Current studies on bakanae disease in rice. Mycobiology. 2023;51(4):195–209. https://doi.org/10.1080/12298093.2023.2241247
  24. 24. Kaur Y, Lore JS, Pannu PPS. Evaluation of rice genotypes for resistance against false smut. Plant Dis Res. 2015;30:46–9.
  25. 25. Whitney NG, Cartwright RD. Kernel smut. In: Cartwright RD, Groth DE, Wamishe YA, Greer CA, Calvert LA, Vera Cruz CM, editors. Compendium of rice diseases and pests. APS Publications; 2018. p. 49–51. https://doi.org/10.1094/9780890545898
  26. 26. Khanal S, Gaire SP, Zhou X. Kernel smut and false smut: the old-emerging diseases of rice—a review. Phytopathology. 2022;113(6):931–44. https://doi.org/10.1094/PHYTO-06-22-0226-RVW
  27. 27. Kutubuddin AM. A trick for a treat: false smut pathogen manipulates plant defense. Plant Cell. 2024;36(5):1598–9. https://doi.org/10.1093/plcell/koae048
  28. 28. Atlin GN, Cairns JE, Das B. Rapid breeding and varietal replacement for climate change adaptation. Glob Food Secur. 2017;12:31–7. https://doi.org/10.1016/j.gfs.2017.01.008
  29. 29. Yang D, He N, Huang F, Jin Y, Li S. Genetic mechanism of immune response to rice false smut. Plants. 2023;12(4):741. https://doi.org/10.3390/plants12040741
  30. 30. Mohidem NA, Hashim N, Shamsudin R, Man HC. Rice for food security. Agriculture. 2022;12(6):741. https://doi.org/10.3390/agriculture12060741
  31. 31. Sun W, Fan J, Fang A, Li Y, Tariqjaveed M, Li D, et al. Ustilaginoidea virens: insights into an emerging rice pathogen. Annu Rev Phytopathol. 2020;58(1):363–85. https://doi.org/10.1146/annurev-phyto-010820-012908
  32. 32. He N, Huang F, Lu L, Wang X, Li QQ, Yang D. SPR9 encodes a ribosomal protein affecting panicle spreading and false smut resistance in Oryza sativa. BMC Plant Biol. 2023;23:205. https://doi.org/10.1186/s12870-023-04172-4
  33. 33. Manu D, Pramoda S, Ramanathan A, Ramchander S, Manonmani S, Jeyaprakash P, et al. Isolation and pathogenesis of Ustilaginoidea virens causing false smut in Oryza sativa. Int J Curr Microbiol Appl Sci. 2017;6(7):632–40. https://doi.org/10.20546/ijcmas.2017.607.077
  34. 34. Andargie M, Li L, Feng A, Zhu X, Li J. Mapping QTL conferring resistance to rice false smut disease. Curr Plant Biol. 2018;15:38–43. https://doi.org/10.1016/j.cpb.2018.11.003
  35. 35. Singh PK, Devanna BN, Dubey H, Singh P, Joshi G, Kumar R. Genome editing to create resistance alleles in rice. Front Genome Ed. 2024;6. https://doi.org/10.3389/fgeed.2024.1415244
  36. 36. Fu R, Zhao L, Chen C, Wang J, Lu D. BSA-SEQ and SSR analysis of resistance to rice false smut. Biomolecules. 2024;14(1):79. https://doi.org/10.3390/biom14010079
  37. 37. Sekhar YC. Morphological and pathogenic variability of Sclerotium rolfsii. Int J Pure Appl Biosci. 2017;5(5):478–87. https://doi.org/10.18782/2320-7051.3003
  38. 38. Han Y, Li D, Yang J, Huang F, Sheng H, Sun W. Mapping QTL for resistance to false smut in rice. Phytopathol Res. 2020;2:20. https://doi.org/10.1186/s42483-020-00059-6
  39. 39. Mishra A, Srinivasan TS, Singh UM, Peramaiyan P. Genetics and management of false smut pathogenesis in rice. Physiol Mol Plant Pathol. 2024;136:102552. https://doi.org/10.1016/j.pmpp.2024.102552
  40. 40. Lore JS, Jain J, Kumar S, Kamboj I, Khanna R, Dhillon BS, et al. Prevention of false smut by manipulating planting date. J Phytopathol. 2021;169(10):597–606. https://doi.org/10.1111/jph.13030
  41. 41. He P, Wang C, Zhang N, Liu B, Yang Y, Zhu Y, et al. Multi-genotype varieties reduce rice diseases. Phytopathol Res. 2021;3(1):28. https://doi.org/10.1186/s42483-021-00105-x
  42. 42. Pandey N, Vaishnav R, Rajavat AS, Singh AN, Kumar S, Tripathi RM, et al. Exploring the potential of Bacillus for crop productivity and sustainable solution for combating rice false smut disease. Front Microbiol. 2024;15. https://doi.org/10.3389/fmicb.2024.1405090
  43. 43. Chen X, Hai D, Tang J, Liu H, Huang J, Luo C, et al. UvCom1 regulates development and infection of Ustilaginoidea virens. Phytopathology. 2019;110(2):483–93. https://doi.org/10.1094/PHYTO-05-19-0179-R
  44. 44. Chen X, Pei Z, Liu H, Huang J, Chen X, Luo C, et al. Host-induced gene silencing confers resistance to rice false smut. Plant Biotechnol J. 2021;20(2):253–5. https://doi.org/10.1111/pbi.13756
  45. 45. Xu Y, Wu S, Yu Z, et al. Transcription factor UvMsn2 controls pathogenicity in Ustilaginoidea virens. Phytopathol Res. 2021;3:16. https://doi.org/10.1186/s42483-021-00093-y
  46. 46. Jose RC, Kanchal T, Louis B, Talukdar NC, Chowdhury D. Grain characteristics and peptides in false smut disease. Biomolecules. 2023;13(4):669. https://doi.org/10.3390/biom13040669
  47. 47. Rashmi C, Gokulapalan C, Raji P, Surendran M. Screening rice varieties for resistance to false smut. Oryza. 2016;53(1):102–5.
  48. 48. Pandey N, Vaishnav R, Rajavat AS, Singh AN, Kumar S, Tripathi RM, et al. Bacillus for crop productivity and rice false smut control. Front Microbiol. 2024;15. https://doi.org/10.3389/fmicb.2024.1405090
  49. 49. Goyal S, Saini DK, Kumar P, Kaur G, Praba UP, Karnatam KS, et al. Meta-QTL analysis for rice disease resistance genes. J Biosci. 2024;49:76. https://doi.org/10.1007/s12038-024-00460-9
  50. 50. Baite MS, Biswal S, Pandit E, Pradhan SK, Barik SR. Molecular screening for false smut resistance. Physiol Mol Plant Pathol. 2025;136:102571. https://doi.org/10.1016/j.pmpp.2025.102571
  51. 51. Guo P, Xu X, Ma Y, Nihal N, Yang M, Ni Z, et al. Biology and diversity of Ustilaginoidea virens in China. Biology. 2025;14(1):46. https://doi.org/10.3390/biology14010046
  52. 52. Huang Y, Cui K, Zhang Z, Chai R, Xie H, Shou J, et al. Fine mapping QTL for rice false smut resistance. J Genet Genomics. 2022;50(4):276–9. https://doi.org/10.1016/j.jgg.2022.11.010
  53. 53. Li DQ, Liu XL, Yuan M, Sun W, Zhou JM, Wang WM, et al. Enhancing rice resistance to false smut. J Genet Genomics. 2025;52(11):1359–66. https://doi.org/10.1016/j.jgg.2025.03.014
  54. 54. Zhou L, Mubeen M, Iftikhar Y, Zheng H, Zhang Z, Wen J, et al. Rice false smut pathogen and mycotoxin risks. Front Microbiol. 2024;15. https://doi.org/10.3389/fmicb.2024.1344831
  55. 55. Wang Y, Yang L, Yang Q, Dong J, Wang Y, Duan Y, et al. Gap-free genomes of Ustilaginoidea virens. Mol Plant Microbe Interact. 2022;35(12):1120–3. https://doi.org/10.1094/MPMI-07-22-0158-A
  56. 56. Ravali S, Basha SA, Babu TK, Mohan YC, Pushpavalli SNCVL, Naik BB, et al. In-vitro and In-vivo fungicidal evaluation against false smut (Ustilaginoidea virens) of rice. Int J Econ Plants. 2024;11(2):93–9. https://doi.org/10.23910/2/2024.5263a
  57. 57. Hiremath SS, Bhatia D, Jain J, Hunjan MS, Kaur R, Zaidi NW, et al. Donors and QTL for false smut resistance. Eur J Plant Pathol. 2020;159:164–70. https://doi.org/10.1007/s10658-020-02172-w
  58. 58. Peng Q, Younas MW, Yang J, Zhu H, Miao J, Gu B, et al. Prochloraz resistance in Fusarium fujikuroi. Plant Dis. 2021;106(2):418–24. https://doi.org/10.1094/PDIS-02-21-0372-RE
  59. 59. Jiehua Q, Shuai M, Yizhen D, Shiwen H, Yanjun K. Ustilaginoidea virens infects rice flowers. Rice Sci. 2019;26(4):199–206. https://doi.org/10.1016/j.rsci.2018.10.007

Downloads

Download data is not yet available.