Departamento de Produção Vegetal, UNESP - Universidade Estadual Paulista, Jaboticabal, Brazil.
Departamento de Biologia Aplicada à Agropecuária, UNESP - Universidade Estadual Paulista, Jaboticabal, Brazil.
J Sci Food Agric. 2019 May;99(7):3525-3529. doi: 10.1002/jsfa.9572. Epub 2019 Feb 13.
Most agricultural soils have low zinc (Zn) content available to crops, which results in a significant decrease in productivity and in public health problems. However, the priming of potato tubers in solutions with Zn can be an effective strategy for their fortification. In order to evaluate the effect of Zn concentrations and tuber priming time on the fortification and bioavailability of Zn, potato tubers were primed in solutions containing 0, 10, 20 and 30 mg mL Zn during 12, 16, 20, and 24 h, respectively. The dry matter and the content of Zn and phytic acid (PA) in tubers were assessed in order to obtain the PA:Zn molar ratio.
Longer priming time increased the Zn content in the cortex of the tubers. High Zn concentration in the solution increased the content of Zn linearly in both the cortex and the central region of the tuber, whereas in the periderm the content levels adjusted to the non-linear logistical model, showing saturation at a minimum of 10 mg mL Zn in the solution. An increase in the bioavailability of Zn was verified when there was higher Zn concentration in the solution.
A substantial increase in Zn bioavailability was obtained by priming the tubers for 12 h in 10 mg mL Zn. © 2019 Society of Chemical Industry.
大多数农业土壤中可被作物利用的锌（Zn）含量较低，这导致了生产力的显著下降和公共卫生问题。然而，在 Zn 溶液中对土豆块茎进行引发处理是一种有效的强化方法。为了评估 Zn 浓度和块茎引发时间对 Zn 强化和生物利用度的影响，土豆块茎分别在含有 0、10、20 和 30 mg mL Zn 的溶液中引发 12、16、20 和 24 h。评估块茎的干物质以及 Zn 和植酸（PA）的含量，以获得 PA:Zn 摩尔比。
较长的引发时间增加了块茎皮层中的 Zn 含量。溶液中较高的 Zn 浓度使块茎的皮层和中心区域中的 Zn 含量呈线性增加，而在周皮中，含量水平则适应非线性逻辑模型，表明在溶液中的 Zn 浓度最低为 10 mg mL 时达到饱和。当溶液中 Zn 浓度较高时，Zn 的生物利用度增加。
通过在 10 mg mL Zn 溶液中引发 12 h，可以显著提高 Zn 的生物利用度。 © 2019 化学工业协会。
