Basile Boris, Brown Natalie, Valdes José Miguel, Cardarelli Mariateresa, Scognamiglio Pasquale, Mataffo Alessandro, Rouphael Youssef, Bonini Paolo, Colla Giuseppe
Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy.
Research and Development Department-In-Pacta, Santiago, Chile.
Plants (Basel). 2021 Mar 24;10(4):619. doi: 10.3390/plants10040619.
Sweet cherry is a high value crop and the economic success of its cultivation depends not only on yield but also on fruit visual and nutritional quality attributes that influence consumer acceptability, as well as on fruit post-harvest performance and resistance to cracking. During the last few decades, cherry growers have tried to achieve these goals through exogenous applications of synthetic plant hormones and/or nutrients, but there is growing concern about the sustainability of the extensive use of these compounds in agriculture. For this reason, there is increasing interest in the possible adoption of different classes of biostimulants as sustainable alternatives to plant growth regulators. This research aimed to study the impact of foliar application of a novel tropical-plant extract, performed between full bloom and fruit set, on the yield and fruit quality of two important commercial sweet cherry cultivars, Kordia and Regina. The experimental design included a commercial control involving the application of a cytokinin promoter. In both cultivars, the tropical-plant extract induced significant increases in fruit yield. In addition, in the cultivar Kordia, the tropical-plant extract enhanced fruit calcium concentration, soluble solids content, flesh firmness, and skin color by 26.2%, 11.8%, 6.7%, and 12.0% (of fruits with mahogany skin color), respectively. Our results suggest that the tropical-plant extract tested as a biostimulant may be a sustainable and effective alternative to the exogenous application of synthetic hormones for sweet cherry cultivation.
甜樱桃是一种高价值作物，其种植的经济成功不仅取决于产量，还取决于影响消费者接受度的果实外观和营养品质属性，以及果实的采后性能和抗裂性。在过去几十年里，樱桃种植者试图通过外源施用合成植物激素和/或营养物质来实现这些目标，但人们越来越担心在农业中大量使用这些化合物的可持续性。因此，越来越多的人关注采用不同种类的生物刺激剂作为植物生长调节剂的可持续替代品。本研究旨在研究在盛花期至坐果期进行叶面喷施一种新型热带植物提取物对两个重要商业甜樱桃品种科迪亚（Kordia）和雷吉娜（Regina）的产量和果实品质的影响。实验设计包括一个施用细胞分裂素促进剂的商业对照。在两个品种中，热带植物提取物均显著提高了果实产量。此外，在科迪亚品种中，热带植物提取物使果实钙浓度、可溶性固形物含量、果肉硬度和果皮颜色（红木色果皮的果实）分别提高了26.2%、11.8%、6.7%和12.0%。我们的结果表明，作为生物刺激剂测试的热带植物提取物可能是甜樱桃种植中外源施用合成激素的一种可持续且有效的替代品。
