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<p>Seed germination is a diverse and complex process, critical as the first step in plant growth. However, industrialization has significantly increased soil salinity, adversely affecting plant development. Plants capable of surviving under higher salt stress conditions could contribute to managing soil salinity, thereby enabling the growth of less salt-tolerant plant species. Understanding the effect of soil salinity on seed germination is essential to address this challenge. Therefore, this study aimed to investigate the impact of graded saline concentrations on the seed germination of six plant species:&#xa0;<i>Acroclinium roseum</i>,&#xa0;<i>Alcea rosea</i>,&#xa0;<i>Brassica juncea</i>,&#xa0;<i>Cucumis sativus</i>,&#xa0;<i>Impatiens balsamina</i>, and&#xa0;<i>Sorghum vulgare</i>. The seeds were germinated on petri plates with two replications per treatment for each species and irrigated with saline solutions of 0&#xa0;M, 0.2&#xa0;M, 0.3&#xa0;M, and 0.5&#xa0;M. Germination was observed daily, and <i>Germination percentage</i>, <i>Peak value of Germination</i>, <i>Median germination time</i>, <i>Emergence rate index</i>, <i>Coefficient of variation of germination time,</i> were analysed using ‘<i>germinationmetrics</i>’ R package. Statistical analysis confirmed a significant difference in the extent to which salinity impacts selected species. Findings revealed that salinity negatively impacts seed germination rates, with the mean highest germination percentage observed (84.38%) in the control groups and the lowest (4.16%) in 0.5&#xa0;M salinity across all species. Seed germination analysis indicated that salinity affects not only germination rates but also germination uniformity and vigour. Statistical analysis confirmed a significant difference in the extent to which salinity impacts selected species. Among the species,&#xa0;<i>Sorghum vulgare</i>&#xa0;(Jowar) demonstrated the highest resilience to salt stress, with significant germination percentage observed under 0.5&#xa0;M salinity. However, even in Jowar&#xa0;lot, the germination rate was substantially lower compared to the control. <i>Acroclinium roseum</i>,&#xa0;<i>Cucumis sativus</i>&#xa0;(Cucumber), and&#xa0;<i>Sorghum vulgare</i>&#xa0;seeds&#xa0;managed to germinate under 0.3&#xa0;M salinity, though their germination percentage and rate were significantly lower than their respective controls. These species also exhibited better germination under 0.2&#xa0;M salinity compared to 0.3&#xa0;M and 0.5&#xa0;M, but their performance remained inferior to the control group. Overall, the results demonstrate that salinity significantly reduces seed germination rates and vigour, with variability in tolerance among species under study. This highlights the potential for identifying and cultivating salt-tolerant species to mitigate the adverse effects of soil salinity and support sustainable agriculture.</p>

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Comparative analysis of germination indices of specific plant species with horticultural importance under varying levels of salinity concentration

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  • 发表日期：

    2025年4月9日

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  • Anushka Pravin Chawhan,
  • Basanti Chintapalli

摘要

Seed germination is a diverse and complex process, critical as the first step in plant growth. However, industrialization has significantly increased soil salinity, adversely affecting plant development. Plants capable of surviving under higher salt stress conditions could contribute to managing soil salinity, thereby enabling the growth of less salt-tolerant plant species. Understanding the effect of soil salinity on seed germination is essential to address this challenge. Therefore, this study aimed to investigate the impact of graded saline concentrations on the seed germination of six plant species: Acroclinium roseum, Alcea rosea, Brassica juncea, Cucumis sativus, Impatiens balsamina, and Sorghum vulgare. The seeds were germinated on petri plates with two replications per treatment for each species and irrigated with saline solutions of 0 M, 0.2 M, 0.3 M, and 0.5 M. Germination was observed daily, and Germination percentage, Peak value of Germination, Median germination time, Emergence rate index, Coefficient of variation of germination time, were analysed using ‘germinationmetrics’ R package. Statistical analysis confirmed a significant difference in the extent to which salinity impacts selected species. Findings revealed that salinity negatively impacts seed germination rates, with the mean highest germination percentage observed (84.38%) in the control groups and the lowest (4.16%) in 0.5 M salinity across all species. Seed germination analysis indicated that salinity affects not only germination rates but also germination uniformity and vigour. Statistical analysis confirmed a significant difference in the extent to which salinity impacts selected species. Among the species, Sorghum vulgare (Jowar) demonstrated the highest resilience to salt stress, with significant germination percentage observed under 0.5 M salinity. However, even in Jowar lot, the germination rate was substantially lower compared to the control. Acroclinium roseum, Cucumis sativus (Cucumber), and Sorghum vulgare seeds managed to germinate under 0.3 M salinity, though their germination percentage and rate were significantly lower than their respective controls. These species also exhibited better germination under 0.2 M salinity compared to 0.3 M and 0.5 M, but their performance remained inferior to the control group. Overall, the results demonstrate that salinity significantly reduces seed germination rates and vigour, with variability in tolerance among species under study. This highlights the potential for identifying and cultivating salt-tolerant species to mitigate the adverse effects of soil salinity and support sustainable agriculture.