Se-enrichment of cucumber (Cucumis sativus L.), lettuce (Lactuca sativa L.) and tomato (Solanum lycopersicum L. Karst) through fortification in pre-transplanting
Se-enrichment of cucumber (Cucumis sativus L.), lettuce (Lactuca sativa L.) and tomato (Solanum lycopersicum L. Karst) through fortification in pre-transplanting
复制标题
DOI：
10.1016/j.scienta.2015.10.039
复制
发表时间：
2015-12-14
影响因子：
4.3
通讯作者：
Tei, Francesco
中科院分区：
文献类型：
--
作者：
Businelli, Daniela;D'Amato, Roberto;Tei, Francesco
我们提出了一种新的作物补硒方法，即在移栽前阶段使用富硒泥炭。该方法如下：(I)在土壤中添加适量的富硒泥炭；(Ii)将所选作物品种的种子播种在富硒泥炭中，直到幼苗大小适合移栽；(Iii)将这些富硒移栽移栽到田间。每千克干泥炭含Se浓度为10~20 mg时，移栽植株富硒，对植株生长无不良影响，高浓度则导致植株生长严重减慢。这些强化移栽植物的硒浓度是未处理对照的2到78倍。在田间移栽后，富硒植株在种植周期结束时的可食器官中的Se含量是对照的1.6倍(番茄)到8.5倍(生菜)。根据试验年份的不同，富硒可食器官(以鲜重计)中的最终硒含量黄瓜为29.3~48.0 mg kg(-1)，生菜叶为22.7~53.4 mg kg(-1)，番茄为15.2~19.9 mg kg(-1)。与对照相比，采用上述技术强化的植株在产量水平和品质方面没有表现出任何负面影响。相反，在某些情况下，与未添加营养物质的对照相比，保质期稍长(生菜)和维生素A(番茄)含量增加。(C)2015爱思唯尔B.V.保留所有权利。
We propose a new method for the fortification of crop plants with Se, based on the use of Se-enriched peat during the pre-transplanting stage. The method is as follows: (i) enrich in Se an appropriate amount of peat; (ii) sow the seeds of the selected crop species in Se-enriched peat until seedlings have the appropriate size for transplanting; (iii) transfer these Se-enriched transplants in the field. Concentrations ranging from 10 to 20 mg Se per kilogram of dry peat induced a Se-enrichment in transplants without negative effects on plant growth, while higher concentrations induced a severe reduction of plant growth. Those fortified transplants showed Se concentrations from 2 to 78 times higher than those observed in the untreated control. After transplanting in the field, the edible organs of Se-enriched plants at the end of cropping cycle showed Se concentrations from 1.6 (tomato) to 8.5 (lettuce) times higher with respect to the untreated controls. The final Se concentrations in Se-enriched edible organs (on a fresh weight basis) were 29.3-48.0 mu g kg(-1) for cucumber fruits, 22.7-53.4 mu g kg(-1) for lettuce leaves and 15.2-19.9 mu g kg(-1) for tomato fruits, depending on the experimental year. Plants fortified with the above technique did not show any negative effects in terms of yield level and quality with respect to controls. On the contrary, a slightly higher shelf-life (lettuce) and an increased level of vitamin A (tomato) were noted in some instances, with respect to non-enriched controls. (C) 2015 Elsevier B.V. All rights reserved.