Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
College of Forestry, Northeast Forestry University, Harbin, Heilongjiang 150040, China.
Food Chem. 2021 Nov 1;361:130177. doi: 10.1016/j.foodchem.2021.130177. Epub 2021 May 24.
Carotenoid content in maize sprouts can be increased by NaCl stress, although high NaCl concentrations negatively impact plant growth. The effects of exogenous methyl jasmonate (MeJA) on contents of carotenoid and antioxidant capacity of yellow maize sprouts under NaCl stress were investigated. Our results showed that treatments of NaCl both alone and combined with MeJA enhanced the carotenoid accumulation in maize sprouts. Moreover, the carotenoid biosynthesis related genes showed different expression patterns under addition of MeJA treatment. Additionally, the combined treatment led to significantly higher content of most carotenoids profiles and the addition of MeJA could alleviate the harmful effect caused by NaCl stress. Furthermore, the combined treatment improved antioxidant enzyme activities and radical scavenging capacity. The results implied that MeJA is kind of effective plant growth regulator for enhancing carotenoid accumulation in maize sprouts by up-regulating the expression levels of key genes involved in carotenoid biosynthetic pathway.
盐胁迫能提高玉米芽中类胡萝卜素的含量，尽管高浓度的 NaCl 会对植物的生长产生负面影响。本研究探讨了外源茉莉酸甲酯（MeJA）对 NaCl 胁迫下黄玉米芽中类胡萝卜素含量和抗氧化能力的影响。结果表明，单独或联合使用 NaCl 均可促进玉米芽中类胡萝卜素的积累。此外，类胡萝卜素生物合成相关基因在 MeJA 处理下表现出不同的表达模式。此外，联合处理导致大多数类胡萝卜素谱的含量显著增加，并且 MeJA 的添加可以减轻 NaCl 胁迫造成的有害影响。此外，联合处理还能提高抗氧化酶活性和自由基清除能力。结果表明，MeJA 是一种有效的植物生长调节剂，通过上调参与类胡萝卜素生物合成途径的关键基因的表达水平，从而提高玉米芽中类胡萝卜素的积累。
