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<p>Salinity and drought are considered crucial for seed germination, seedling growth, and crop production in arid and semi-arid regions. Seed priming can be an effective solution to improve barley germination and growth, under salinity and drought stress. The objective of this study was to evaluate the effectiveness of GA3 seed priming in enhancing germination and growth parameters of Tunisian barley varieties under these stress conditions. An experiment was conducted to study the effect of seed priming with GA<sub>3</sub>, salinity and drought stress on germination of three varieties of Tunisian barley. Before germination, barley seeds were soaked in 100 mM aqueous GA<sub>3</sub> solution for 12&#xa0;h. Primed and unprimed seeds were germinated in petri dishes and watered with 20&#xa0;ml of distilled water for the controls and with 20&#xa0;ml of iso-osmotic solutions of NaCl and PEG 400 at − 0.44 and − 0.92&#xa0;MPa at two days intervals. Germination percentage and speed, root length and elongation, and tolerance indexes (GSI, TI) were measured to access the germination parameters and to evaluate the effectiveness of priming barley grains with gibberellic acid. Our results indicate that NaCl and PEG affect germination, with the impact becoming more pronounced as the treatment concentration increases. Priming with GA<sub>3</sub> enhances the final germination rate. The stresses caused an increase in germination speed, resulting in a germination delay. The Roho variety appears to be the most tolerant to saline and water stress. Thus, GA<sub>3</sub> priming stands out as an effective technique to sustain crop productivity and support food security amidst increasing salinity and drought challenges.</p>

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Gibberellic acid alleviate salinity and drought impacts in germinating barley seeds

  • 期刊论文

  • 发表日期：

    2026年5月16日

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  • Faiza Boussora,
  • Tebra Triki,
  • Sihem Ben Ali,
  • Amna Ghanmi,
  • Amel Gasmi,
  • Kamel Nagaz,
  • Ali Ferchichi,
  • Elhem Mallek Maalej,
  • Ferdaous Guasmi

摘要

Salinity and drought are considered crucial for seed germination, seedling growth, and crop production in arid and semi-arid regions. Seed priming can be an effective solution to improve barley germination and growth, under salinity and drought stress. The objective of this study was to evaluate the effectiveness of GA3 seed priming in enhancing germination and growth parameters of Tunisian barley varieties under these stress conditions. An experiment was conducted to study the effect of seed priming with GA3, salinity and drought stress on germination of three varieties of Tunisian barley. Before germination, barley seeds were soaked in 100 mM aqueous GA3 solution for 12 h. Primed and unprimed seeds were germinated in petri dishes and watered with 20 ml of distilled water for the controls and with 20 ml of iso-osmotic solutions of NaCl and PEG 400 at − 0.44 and − 0.92 MPa at two days intervals. Germination percentage and speed, root length and elongation, and tolerance indexes (GSI, TI) were measured to access the germination parameters and to evaluate the effectiveness of priming barley grains with gibberellic acid. Our results indicate that NaCl and PEG affect germination, with the impact becoming more pronounced as the treatment concentration increases. Priming with GA3 enhances the final germination rate. The stresses caused an increase in germination speed, resulting in a germination delay. The Roho variety appears to be the most tolerant to saline and water stress. Thus, GA3 priming stands out as an effective technique to sustain crop productivity and support food security amidst increasing salinity and drought challenges.