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<p>This study is aimed to evaluate the efficacy of GA<sub>3</sub> encapsulated chitosan nanoparticles (GA<sub>3</sub>-CSNPs) on seed germination and seedling growth of <i>Saraca asoca</i>. Chitosan nanoparticles (CSNPs) were prepared using ionic gelation method. The synthesized CSNPs were used to encapsulate different concentrations (1.0–10.0&#xa0;mg/L) of GA<sub>3</sub>. Initially, the entrapped efficiency of GA<sub>3</sub> within CSNPs was determined. After surface sterilization, the seeds were primed with the different nanoformulations (1.0–10.0&#xa0;mg/L GA<sub>3</sub>-CSNPs). The concentration of GA<sub>3</sub>-CSNPs showed maximum entrapment efficiency and germination percentage was subjected to different characterization techniques. The synthesized GA<sub>3</sub>-CSNPs were spherical and trigonal shaped with the size of 66.38 ± 0.85&#xa0;nm. They had positively charged zeta potential value (+ 49.21&#xa0;mV) with 0.4 PDI value. Among various concentrations of GA<sub>3</sub>-CSNPs, 2.0&#xa0;mg/L concentration showed enhanced significant (<i>p</i> &lt; 0.05) seed germination percentage (98.5%) compared to control. The seeds primed with 2.0&#xa0;mg/L concentration containing GA<sub>3</sub>-CSNPs positively influenced the early growth of <i>S. asoca</i> under greenhouse condition. Various morphological characteristics of seedlings, i.e., shoot length (34.02 ± 2.13&#xa0;cm), root length (33.53 ± 1.20&#xa0;cm), fresh weight of the seedling (17.5 ± 0.60&#xa0;g), dry weight of the seedling (13.8 ± 0.98&#xa0;g), and seedling vigour index (3097.46 ± 1.39) were found to be higher in 2.0&#xa0;mg/L GA<sub>3</sub>-CSNPs<sub>3</sub> compared to control after 60&#xa0;days of growth. The results of this investigation indicated the potential of using GA<sub>3</sub>-CSNPs at low concentration as seed priming agent for enhanced germination and morphological features of <i>S. asoca</i>.</p>

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Enhancing Seed Germination and Morphological Characteristics of Saraca asoca (Roxb.) Willd Using GA3-Encapsulated Chitosan Nanoparticles: A Sustainable Agriculture Through Seed Nano-priming

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Kavimani Thangasamy,
  • Anju Rani George,
  • Sradha Sajeev,
  • Aarthi Jeganathan,
  • Anju Byju,
  • Natesan Geetha

摘要

This study is aimed to evaluate the efficacy of GA3 encapsulated chitosan nanoparticles (GA3-CSNPs) on seed germination and seedling growth of Saraca asoca. Chitosan nanoparticles (CSNPs) were prepared using ionic gelation method. The synthesized CSNPs were used to encapsulate different concentrations (1.0–10.0 mg/L) of GA3. Initially, the entrapped efficiency of GA3 within CSNPs was determined. After surface sterilization, the seeds were primed with the different nanoformulations (1.0–10.0 mg/L GA3-CSNPs). The concentration of GA3-CSNPs showed maximum entrapment efficiency and germination percentage was subjected to different characterization techniques. The synthesized GA3-CSNPs were spherical and trigonal shaped with the size of 66.38 ± 0.85 nm. They had positively charged zeta potential value (+ 49.21 mV) with 0.4 PDI value. Among various concentrations of GA3-CSNPs, 2.0 mg/L concentration showed enhanced significant (p < 0.05) seed germination percentage (98.5%) compared to control. The seeds primed with 2.0 mg/L concentration containing GA3-CSNPs positively influenced the early growth of S. asoca under greenhouse condition. Various morphological characteristics of seedlings, i.e., shoot length (34.02 ± 2.13 cm), root length (33.53 ± 1.20 cm), fresh weight of the seedling (17.5 ± 0.60 g), dry weight of the seedling (13.8 ± 0.98 g), and seedling vigour index (3097.46 ± 1.39) were found to be higher in 2.0 mg/L GA3-CSNPs3 compared to control after 60 days of growth. The results of this investigation indicated the potential of using GA3-CSNPs at low concentration as seed priming agent for enhanced germination and morphological features of S. asoca.