BACKGROUND:Purple Queen® is an early ripening pomegranate cultivar growing well in soilless cultivation. Substrates have direct effects on plant development and, due to progressive peatland exhaustion, the request for new materials for plant growth is high. OBJECTIVE:The objective of this work wasto verify the effects of a new potential substrate obtained from the remediation of marine port sediments on the nutraceutical profile of Purple Queen® fruits, using 50% and 100% of reclaimed sediment. METHODS:The study was carried out determining ellagitannins and polysaccharides obtained from peel after decoction, and anthocyanins in aril juice on fruits from two agronomic seasons. RESULTS:The presence of 100% of the sediment had a partial detrimental effect on fruits size and weight. Compared to a peat-based commercial substrate (control), remediated sediment preserved ellagitannin content and increased the anthocyanin amount (up to 40% higher) and polysaccharide content up to 34% on dry fruit. High molecular weight polysaccharides (>2000 kDa) were identified in all the fruits with glucose and galacturonic acid as the major sugars. CONCLUSIONS:Fruits from plants cultivated only on sediment or in a mixture with 50% of peat showed significant increases of bioactive compounds as stress response in two consecutive seasons.

中文翻译：

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Punica granatum L.的Purple Queen®果实：营养特性和非常规生长基质

背景：PurpleQueen®是一种早熟的石榴品种，在无土栽培中生长良好。基质对植物的生长有直接影响，由于泥炭地逐渐枯竭，对植物生长的新材料的要求很高。目的：这项工作的目的是使用50％和100％的回收沉积物，验证从补救海港沉积物获得的新潜在基质对PurpleQueen®水果的营养成分的影响。方法：研究测定了两个农艺季节水煎后果皮中的鞣花单宁和多糖，以及假种皮汁中花青素的含量。结果：100％的沉积物的存在对果实的大小和重量有部分不利影响。与基于泥炭的商业基质（对照）相比，修复后的沉积物保留了鞣花单宁含量，干果中的花青素含量增加了40％以上，多糖含量增加了34％。在所有水果中鉴定出高分子量多糖（> 2000 kDa），其中葡萄糖和半乳糖醛酸为主要糖。结论：仅在沉积物上或与50％的泥炭混合种植的植物的果实显示，在连续两个季节中，作为胁迫响应的生物活性化合物显着增加。