Abstract In this research the effect of foliar application of selenium (Se) at four levels (Na2OSe4; 0, 5, 10 and 20 mg L−1) was evaluated on some phytochemical characteristics of Sultana grapevine under different salinity levels (NaCl; 0 or 75 mM). The vines were fed twice a week with Hoagland nutrient solution and Se was foliar applied twice with 24 intervals. During growing period, plant height, leaf number and leaf area were recorded. Moreover, at the end of experiment, mature leaves from middle nods of canes were used for measurement of some phytochemical indices. According to results, Se application had a positive effect on plant height, leaf numbers, leaf area and photosynthetic pigments content especially at 5 mg L−1 and to some extent 10 mg L−1 Se levels. Under salinity stress, foliar application of Se at 5 mg L−1 considerably decreased vines leaves electrolyte leakage and lipid peroxidation values compared to non se-treated plants under salinity stress condition. Selenium had an additive effect on salinity stress (75 mM NaCl) induced accumulation of total phenol, total flavonoid, soluble sugars and proline content in leave of vines. Moreover, the interaction of salinity and Se at 5 and 10 mg L−1 improved leaves antioxidant enzymes activities in Sultana grapevine. Likewise, foliar application of Se improved leaf mineral content in 75 mM NaCl -treated vines. Totally, foliar application of selenium (Se at 5 or 10 mg L−1) increased salt tolerance through improvement in nutritional balance and by enzymatic and non-enzymatic antioxidant capacity in grapevine leaves.

中文翻译：

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叶面喷硒对 Vitis vinifera L. cv. 一些生理和植物化学参数的影响。盐胁迫下的苏丹娜

摘要 本研究评估了在不同盐度水平（NaCl；0 或 20 mg L-1）下，叶面喷施四种水平（Na2OSe4；0、5、10 和 20 mg L-1）的硒（Se）对 Sultana 葡萄藤某些植物化学特性的影响。 75 毫米）。葡萄藤每周用 Hoagland 营养液喂养两次，叶面喷施硒两次，间隔 24 次。在生长期，记录株高、叶数和叶面积。此外，在实验结束时，使用甘蔗中间根部的成熟叶来测量一些植物化学指标。根据结果​​，Se 施用对株高、叶数、叶面积和光合色素含量有积极影响，特别是在 5 mg L-1 和在某种程度上 10 mg L-1 Se 水平下。在盐分胁迫下，与盐胁迫条件下未经硒处理的植物相比，叶面喷施 5 mg L-1 硒可显着降低葡萄藤叶片电解质渗漏和脂质过氧化值。硒对盐度胁迫（75 mM NaCl）诱导的葡萄叶中总酚、总黄酮、可溶性糖和脯氨酸含量的积累具有累加作用。此外，5 和 10 mg L-1 的盐度和硒的相互作用提高了苏丹娜葡萄藤的叶片抗氧化酶活性。同样，在 75 mM NaCl 处理过的葡萄藤中，叶面喷施硒提高了叶片矿物质含量。总的来说，叶面喷施硒（5 或 10 mg L-1 的硒）通过改善营养平衡以及葡萄叶片的酶促和非酶促抗氧化能力提高了耐盐性。