Klunklin Warinporn, Savage Geoffrey
Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand.
Foods. 2017 Jul 25;6(8):56. doi: 10.3390/foods6080056.
Tomatoes are one of the most nutritionally and economically important crops in New Zealand and around the world. Tomatoes require large amounts of water to grow well and are adversely affected by drought stress. However, few studies have evaluated the physicochemical characteristics of commercial tomatoes grown under water stress conditions. Four tomato cultivars (Incas, Marmande, Scoresby Dwarf, and Window Box Red) were grown in a greenhouse under well-watered and drought stress conditions and the tomatoes were harvested when ripe. The physicochemical properties and antioxidant contents of the fruits were compared. There were significant differences between cultivars in quality characteristics-such as dry matter, total soluble solids, and pH parameters-but there were no differences in the quality characteristics between the two treatments of the fruits ( > 0.05); however, there were significant differences ( < 0.05) in the antioxidant compositions (lycopene, total phenolics, and flavonoids) and antioxidant activities (DPPH and ABTS) of the fruits of both cultivars and treatments. Overall, these results indicated that tomatoes increased their bioactive compounds without changing any quality characteristics when exposed to water stress conditions.
番茄是新西兰乃至全球营养和经济价值最为重要的作物之一。番茄生长需要大量水分，干旱胁迫会对其产生不利影响。然而，很少有研究评估在水分胁迫条件下种植的商业番茄的理化特性。在温室中，将四个番茄品种（印加、玛曼德、斯考斯比矮生和窗盒红）分别种植在水分充足和干旱胁迫条件下，待果实成熟时进行采收。比较了果实的理化性质和抗氧化剂含量。品种之间在品质特性（如干物质、总可溶性固形物和pH参数）上存在显著差异，但两种处理的果实品质特性没有差异（P>0.05）；然而，两个品种和两种处理的果实抗氧化成分（番茄红素、总酚和类黄酮）和抗氧化活性（DPPH和ABTS）存在显著差异（P<0.05）。总体而言，这些结果表明，番茄在水分胁迫条件下，生物活性化合物增加，而品质特性未发生任何变化。
