Department of Food Technology, EPSO, University Miguel Hernández, Orihuela, Alicante, Spain.
Department of Applied Biology, EPSO, University Miguel Hernández, Orihuela, Alicante, Spain.
J Sci Food Agric. 2020 Jan 15;100(1):145-153. doi: 10.1002/jsfa.10007. Epub 2019 Oct 22.
Previous reports have addressed the effectiveness of postharvest methyl jasmonate (MeJA) treatments on maintaining quality properties of pomegranate fruit during storage. However, there is no literature regarding the effects of preharvest MeJA treatments on pomegranate 'Mollar de Elche' crop yield, fruit ripening, quality attributes and bioactive compounds content (at harvest or after long-term storage), which were evaluated in this research.
Preharvest MeJA treatments (1, 5, and 10 mmol L ) increased pomegranate crop yield. MeJA at 1 and 5 mmol L accelerated the on-tree ripening process, while it was delayed with 10 mmol L . Losses in fruit weight, firmness and organic acids during storage at 10 °C were delayed in MeJA treated fruit, leading to quality maintenance. In addition, MeJA treatments improved arils colour due to increased concentration of total and individual anthocyanins, at harvest and during storage. Total phenolic and ascorbic acid contents and total antioxidant activity [hydrophilic (H-TAA) and lipophilic (L-TAA) fractions] were also higher in arils from treated pomegranate fruits than in controls.
Preharvest treatments with MeJA could be a promising tool to improve pomegranate crop yield, fruit quality and its content in bioactive compounds at harvest and during storage. The higher effects were obtained with MeJA at 5 mmol L dose, which could be the selected treatment for practical application purposes. © 2019 Society of Chemical Industry.
先前的报告已经探讨了采后茉莉酸甲酯（MeJA）处理对石榴果实贮藏期间品质特性的保持效果。然而，关于采前 MeJA 处理对石榴‘Mollar de Elche’作物产量、果实成熟、品质特性和生物活性化合物含量（在收获时或长期贮藏后）的影响，尚未有文献报道。
采前 MeJA 处理（1、5 和 10 mmol L-1）增加了石榴的作物产量。1 和 5 mmol L-1 的 MeJA 加速了果实的成熟过程，而 10 mmol L-1 的 MeJA 则延迟了成熟过程。在 10°C 下贮藏时，果实失重、硬度和有机酸的损失在 MeJA 处理的果实中得到延缓，从而保持了果实的品质。此外，MeJA 处理通过增加总和个体花青素的浓度，改善了石榴籽的颜色，无论是在收获时还是在贮藏期间。处理过的石榴果实中的总酚和抗坏血酸含量以及总抗氧化活性[亲水性（H-TAA）和疏水性（L-TAA）部分]也高于对照。
采前 MeJA 处理可以成为一种有前途的工具，用于提高石榴的作物产量、果实品质及其在收获和贮藏期间生物活性化合物的含量。在 5 mmol L-1 的 MeJA 剂量下，效果更高，这可能是实际应用的选择处理。 © 2019 英国化学学会。
