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Plant Science Today (PST)

Research communications

Vol. 12 No. sp4 (2025): Recent Advances in Agriculture by Young Minds - III

Influence of NaCl stress on germination, growth and vigour of onion (Allium cepa L.) seedlings

DOI
https://doi.org/10.14719/pst.12249
Submitted
13 October 2025
Published
12-12-2025

Abstract

Onion (Allium cepa L.), a globally important vegetable crop, is highly sensitive to salinity stress, particularly during its early developmental phases, especially the germination stage. This study evaluated the effect of varying sodium chloride (NaCl) concentrations (0, 50, 100, 150, 200 and 250 mM) on seed germination and early seedling growth of four improved onion cultivars-Bhima Shweta, Bhima Red, Bhima Shakti and Bhima Kiran-under controlled laboratory conditions using a factorial completely randomised design (FCRD) with three replications. Germination percentage, shoot and root length, fresh and dry weights, survival and mortality rates and seed vigour indices were measured. Results demonstrated that NaCl concentrations exceeding 50 mM significantly reduced germination, growth and vigour parameters in all cultivars, with the most severe inhibition observed at 250 mM (37-49 % germination, 70-80 % reduction in seedling elongation and > 50 % mortality). Among the cultivars tested, Bhima Shakti exhibited the highest salt tolerance, maintaining greater germination percentages, biomass accumulation, survival rates and vigour indices compared to other cultivars. The findings indicate that increasing salinity delayed emergence, impaired water uptake, disrupted ion homeostasis and reduced seedling survival, underscoring the importance of selecting salt-tolerant cultivars for sustainable onion production in saline-affected regions.

References

  1. 1. Benkeblia N. Free-radical scavenging capacity and antioxidant properties of some selected onions (Allium cepa L.) and garlic (Allium sativum L.) extracts. Braz Arch Biol Technol. 2005;48:753–59. https://doi.org/10.1590/S1516-89132005000600011
  2. 2. Jones HA, Mann LK. Onions and their allies: botany, cultivation and utilisation. London: Leonard Hill; 1963. https://doi.org/10.56093/jsswq.v16i3.156382
  3. 3. Food and Agriculture Organisation. Production Yearbook. Vol. 58. Rome: FAO; 2019. p. 153.
  4. 4. Department of Agriculture & Farmers Welfare. Final Estimates of 2022-23 and First Advance Estimates of 2023-24 of Area and Production of Horticultural Crops. New Delhi: Press Information Bureau; 2024.
  5. 5. Mandal S, Mishra VK, Verma CL, Sharma PC. ICAR-Central Soil Salinity Research Institute. Karnal: ICAR-CSSRI.
  6. 6. Rani S, RamPrakash, Dhanda A, Meena RL, Jyoti Khatkar. Cultivation of onion under fertigation using saline water in the semi-arid region of Haryana in India. J Soil Salinity Water Qual. 2024;16(3):416–23.https://doi.org/10.56093/jsswq.v16i3.156382
  7. 7. Maas EV, Hoffman GJ. Crop salt tolerance-current assessment. J Irrig Drain Div. 1977;103(2):115–34. https://doi.org/10.1061/JRCEA4.0001137
  8. 8. Ghoulam C, Foursy A, Fares K. Effects of salt stress on growth, inorganic ions and proline accumulation in relation to osmotic adjustment in five sugar beet cultivars. Environ Exp Bot. 2002;47(1):39–50. https://doi.org/10.1016/S0098-8472(01)00109-5
  9. 9. Maranon EV, Grieve CM. Spike and leaf development in salt-stressed wheat. Crop Sci. 1989;30:1309–13. https://doi.org/10.2135/cropsci1990.0011183X003000060031x
  10. 10. Al-Harbi AR, Hegazi HH, Alsadon AA, El-Adgham F. Growth and yield of onion (Allium cepa L.) cultivars under different levels of irrigation water salinity. J King Saud Univ. 2002;14:23–32.
  11. 11. Chang PT, Randle WM. Sodium chloride in nutrient solutions can affect onion growth and flavour development. HortScience. 2004;39(6):1416–20. https://doi.org/10.21273/HORTSCI.39.6.1416
  12. 12. Miyamoto S. Salt effects on germination, emergence and seedling mortality of onion. Agron J. 1989;81(2):202–7. https://doi.org/10.2134/agronj1989.00021962008100020013x
  13. 13. Singh P, Gopal J. Effect of water and salinity stress on germination and seedling characters in onion. Int J Veg Sci. 2019.;76(2):368–72. https://doi.org/10.5958/0974-0112.2019.00059.8
  14. 14. Joshi N, Sawant P. Response of onion (Allium cepa L.) seed germination and early seedling development to salt level. Int J Veg Sci. 2012;18(1):3–19. https://doi.org/10.1080/19315260.2011.568597
  15. 15. Zhu JK. Plant salt tolerance. Trends Plant Sci. 2001;6(2):66–71. https://doi.org/10.1016/S1360-1385(00)01838-0
  16. 16. Sudha GS, Riazunnisa K. Effect of salt stress (NaCl) on morphological parameters of onion (Allium cepa L.) seedlings. Int J Plant Anim Environ Sci. 2015;76(2):368–72.
  17. 17. Corrêa NS, Marini JP, Lopes NF, Munt D. Salt stress: antioxidant activity as a physiological adaptation of onion cultivars. Acta Bot Bras. 2013;27(2):394–9. https://doi.org/10.1590/S0102-33062013000200013
  18. 18. Saadat S, Badakhshan P, Sattarzadeh A, Soula ST. Effect of salinity on germination and seedling growth of 4 sugar beet genotypes (Beta vulgaris L.). Tech J Engin Appl Sci. 2012;2(5): 615–19.
  19. 19. Maiti R, Vidyasagar P, Umashankar P, González-Rodríguez H. Genotypic variability in salinity tolerance of some vegetable crop species at germination and seedling stage. Int J Bioresour Stress Manag. 2010;1(3):204–9.
  20. 20. Mamedi A, Sharifzadeh F, Maali-Amiri R, Divargar F, Rasoulnia A. Seed osmopriming with Ca2+ and K+ improves salt tolerance in quinoa seeds and seedlings by amplifying antioxidant defence and ameliorating the osmotic adjustment process. Physiol Mol Biol Plants. 2022;28(1):251–74. https://doi.org/10.1007/s12298-022-01125-3
  21. 21. Sairam RK, Tyagi A. Physiology and molecular biology of salinity stress tolerance in plants. Curr Sci. 2004;86(3):407–21.

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