University of Carthage, Non-Conventional Water Valuation Research Laboratory (LR VENC), INRGREF, Hedi EL Karray Street, El Menzah IV, 1004 Tunis, Tunisia.
Institution of Research and Higher Education Agriculture (IRESA), Regional Center of Agricultural Research, Sidi Bouzid, 9100, Tunisia.
Chem Biodivers. 2022 Apr;19(4):e202100851. doi: 10.1002/cbdv.202100851. Epub 2022 Mar 30.
The present work was designed to evaluate the effects of two water shortage strategies on the phenolic profile and antioxidants activities of four Prunus persica L. cultivars (Flordastar, Early May crest, Rubirich and O'Henry). Over the course of two successive seasons (2016 and 2017), three different irrigation strategies were tested: full irrigation (FI: 100 % crop evapotranspiration (Etc)), sustained deficit irrigation (SDI: 50 % ETc), and cyclic deficit irrigation (CDI: irrigation at 100 % field capacity with a soil moisture of 50 % field capacity). HPLC-UV/VIS profile of phenolic compounds, enzymatic and non-enzymatic antioxidant activities were assessed in exocarp and mesocarp. The results showed that deficit irrigation improved the content of phenolic compounds and the antioxidant activities. In O'Henry, ascorbate peroxidase activity increased significantly under CDI in exocarp (249 %). In conclusion, most cultivars showed an improvement of the fruit quality under SDI, whereas O'Henry fruits gathered the highest phenolic amounts and displayed the best antioxidant activity under CDI.
本研究旨在评估两种水分亏缺策略对四个油桃品种（Flordastar、Early May crest、Rubirich 和 O'Henry）果实中酚类物质组成和抗氧化活性的影响。在两个连续的季节（2016 年和 2017 年）中，测试了三种不同的灌溉策略：充分灌溉（FI：100%作物蒸散量（Etc））、持续亏缺灌溉（SDI：50%Etc）和循环亏缺灌溉（CDI：在田间持水量为 100%时进行灌溉，土壤含水量为 50%田间持水量）。采用高效液相色谱-紫外可见分光光度法（HPLC-UV/VIS）测定了外果皮和中果皮中酚类化合物的含量、酶和非酶抗氧化活性。结果表明，水分亏缺处理提高了果实中酚类物质的含量和抗氧化活性。在 O'Henry 中，外果皮中 CDI 处理下的抗坏血酸过氧化物酶活性显著增加（249%）。总之，大多数品种在 SDI 下果实品质得到改善，而 O'Henry 果实中酚类物质含量最高，在 CDI 下抗氧化活性最好。
