Abou Chehade Lara, Al Chami Ziad, De Pascali Sandra Angelica, Cavoski Ivana, Fanizzi Francesco Paolo
CIHEAM - Istituto Agronomico Mediterraneo di Bari, 70010, Valenzano, Italy.
Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, 73100, Lecce, Italy.
J Sci Food Agric. 2018 Mar;98(4):1426-1436. doi: 10.1002/jsfa.8610. Epub 2017 Sep 25.
Biostimulants have recently gained increased attention due to their multiple benefits for sustainable agriculture. In this study, three food processing by-products - fennel processing residues (FPR), lemon processing residues (LPR) and brewer's spent grain (BSG) - were investigated as potential sources of biostimulants. Their aqueous extracts as individual and associated applications were assessed for their effects on agronomic, quality and metabolic performance of organic tomato in comparison to extract of humic substances (HS) and untreated control (CTRL).
Only FPR extracts stimulated shoot growth and tomato dry matter content, whereas all candidates improved tomato yield. FPR and BSG increased fruit mineral content and BSG-FPR-LPR in combination enhanced titratable acidity. FPR-treated fruits had also 20% more vitamin C than CTRL, and higher phenol content was obtained in those of BSG-LPR. Fruit metabolomic profile showed the tendency of all extracts, except BSG-LPR, to increase tomato citric acid and to decrease β-glucose and methanol concentrations. The analysis revealed accordingly the indispensable role of FPR in combined applications for inducing an HS-like response in fruits.
The results were indicative of the biostimulant activity of these extracts and demonstrated them, particularly FPR, as promising candidates for enhancing plant productivity and fruit quality. © 2017 Society of Chemical Industry.
生物刺激剂因其对可持续农业具有多种益处，近来受到越来越多的关注。在本研究中，对三种食品加工副产物——茴香加工残渣（FPR）、柠檬加工残渣（LPR）和啤酒糟（BSG）——作为生物刺激剂的潜在来源进行了研究。与腐殖物质（HS）提取物和未处理对照（CTRL）相比，评估了它们的水提取物单独及联合应用对有机番茄农艺、品质和代谢性能的影响。
只有FPR提取物刺激了茎的生长和番茄干物质含量，而所有候选物均提高了番茄产量。FPR和BSG提高了果实矿物质含量，BSG - FPR - LPR联合使用提高了可滴定酸度。经FPR处理的果实维生素C含量也比CTRL高20%，BSG - LPR处理的果实中酚含量更高。果实代谢组学图谱显示，除BSG - LPR外，所有提取物均有增加番茄柠檬酸含量、降低β - 葡萄糖和甲醇浓度的趋势。分析相应地揭示了FPR在联合应用中诱导果实产生类似HS反应的不可或缺的作用。
结果表明这些提取物具有生物刺激活性，并证明它们，特别是FPR，是提高植物生产力和果实品质的有前景的候选物。© 2017化学工业协会。
