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<p>Antioxidant response and the expression of genes involved in germination performance, genes encoding α-amylase, GA-Myb (a gibberellin-regulated MYB transcription factor), PYL8 (Pyrabactin Resistance 1-Like 8, an abscisic acid receptor), and SnRK2 (Sucrose Non-Fermenting 1-Related Protein Kinase 2, key in ABA signalling) were analyzed in six-month-old seeds of three <i>Capsicum annuum</i> cultivars primed with water and KNO₃. Priming differently affected pre-germinative metabolism. Expression of α-amylase and GA-Myb genes increased only with halopriming, whereas PYL8 and SnRK2 expression decreased under both treatments. Antioxidant activity and protein content were higher in primed seeds than controls, with haloprimed seeds showing the highest levels. Electrical conductivity was higher in the control leachate than hydroprimed seeds, and highest in haloprimed seeds, likely due to KNO₃. The stronger activation of pre-germinative metabolism in haloprimed seeds improved germination. Mean germination time (MGT) was significantly lower than in control and hydroprimed seeds, and root length was greater. These findings suggest halopriming is superior to hydropriming in the tested cultivars, as it modulates the expression of the four genes while enhancing germination and growth.</p>

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Different seed priming techniques variously modulate pre-germinative metabolism and germination performance in three Capsicum annuum cultivars

  • 期刊论文

  • 发表日期：

    2026年1月28日

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  • Angelo Granata,
  • Maria Cristina Sorrentino,
  • Simone Landi,
  • Anna Gaglione,
  • Sergio Esposito,
  • Fiore Capozzi,
  • Valeria Spagnuolo

摘要

Antioxidant response and the expression of genes involved in germination performance, genes encoding α-amylase, GA-Myb (a gibberellin-regulated MYB transcription factor), PYL8 (Pyrabactin Resistance 1-Like 8, an abscisic acid receptor), and SnRK2 (Sucrose Non-Fermenting 1-Related Protein Kinase 2, key in ABA signalling) were analyzed in six-month-old seeds of three Capsicum annuum cultivars primed with water and KNO₃. Priming differently affected pre-germinative metabolism. Expression of α-amylase and GA-Myb genes increased only with halopriming, whereas PYL8 and SnRK2 expression decreased under both treatments. Antioxidant activity and protein content were higher in primed seeds than controls, with haloprimed seeds showing the highest levels. Electrical conductivity was higher in the control leachate than hydroprimed seeds, and highest in haloprimed seeds, likely due to KNO₃. The stronger activation of pre-germinative metabolism in haloprimed seeds improved germination. Mean germination time (MGT) was significantly lower than in control and hydroprimed seeds, and root length was greater. These findings suggest halopriming is superior to hydropriming in the tested cultivars, as it modulates the expression of the four genes while enhancing germination and growth.