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<p>The performance of ‘Daregazi,’ ‘Louise Bonne,’ and ‘William Duchess’ pear scion cultivars chip-budded at a&#xa0;height of 10 cm onto three rootstocks (OHF69, Pyrodwarf, and a&#xa0;seedling of <i>Pyrus communis</i>) was assessed using 2‑year-old trees grown individually in plastic pots filled with silty-clay-loam under varying levels of NaCl salinity (EC = 0.8 [control], 1.6, 3.2, and 4.0 dS/m). This factorial experiment, based on a&#xa0;randomized complete block design with three replications, was conducted over two consecutive years (2015–2016) at the Kamalabad Horticulture Research Station, Karaj, Iran. Key parameters—including leaf total chlorophyll content (SPAD value), chlorophyll fluorescence parameters (Fv/Fm), rootstock diameter, tree height, and leaf nutrient content (N, P, K, Ca, Mg, Fe, Zn, and B)—were evaluated. Results indicated that all measured traits decreased as salinity levels increased. However, the rate of decline varied significantly among the grafted pear rootstock combinations. The seedling rootstock grafted with ‘Louise Bonne’ was identified as the most salt-tolerant combination, while the Pyrodwarf rootstock grafted with ‘Louise Bonne’ and the seedling rootstock grafted with ‘Daregazi’ were the most salt-sensitive.</p>

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Influence of the Rootstock/Scion Combination on Behavior of Pear Under Salt Stress

  • 期刊论文

  • 发表日期：

    2025年6月30日

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  • Mitra Mirabdulbaghi,
  • Reza Zarghami

摘要

The performance of ‘Daregazi,’ ‘Louise Bonne,’ and ‘William Duchess’ pear scion cultivars chip-budded at a height of 10 cm onto three rootstocks (OHF69, Pyrodwarf, and a seedling of Pyrus communis) was assessed using 2‑year-old trees grown individually in plastic pots filled with silty-clay-loam under varying levels of NaCl salinity (EC = 0.8 [control], 1.6, 3.2, and 4.0 dS/m). This factorial experiment, based on a randomized complete block design with three replications, was conducted over two consecutive years (2015–2016) at the Kamalabad Horticulture Research Station, Karaj, Iran. Key parameters—including leaf total chlorophyll content (SPAD value), chlorophyll fluorescence parameters (Fv/Fm), rootstock diameter, tree height, and leaf nutrient content (N, P, K, Ca, Mg, Fe, Zn, and B)—were evaluated. Results indicated that all measured traits decreased as salinity levels increased. However, the rate of decline varied significantly among the grafted pear rootstock combinations. The seedling rootstock grafted with ‘Louise Bonne’ was identified as the most salt-tolerant combination, while the Pyrodwarf rootstock grafted with ‘Louise Bonne’ and the seedling rootstock grafted with ‘Daregazi’ were the most salt-sensitive.