Macronutrient deprivation eustress elicits differential secondary metabolites in red and green-pigmented butterhead lettuce grown in a closed soilless system
Macronutrient deprivation eustress elicits differential secondary metabolites in red and green-pigmented butterhead lettuce grown in a closed soilless system
复制标题
DOI：
10.1002/jsfa.9985
复制
发表时间：
2019-09-09
影响因子：
4.1
通讯作者：
Rouphael, Youssef
中科院分区：
文献类型：
--
作者：
El-Nakhel, Christophe;Pannico, Antonio;Rouphael, Youssef
背景通过精确控制营养液(NS)，封闭式无土系统能够有针对性地操纵植物次生代谢物，这些次生代谢物构成了人类日常饮食中促进健康的成分。采用营养膜技术(NFT)研究了以NS为基础的常量营养素浓度(电导率分别为1.5、0.75和0.5dsm(-1)的全、半和四分之一强度)对红色和绿色色泽沙拉诺瓦(R)毛头生菜生物活性的影响。结果半强度生理盐水使两个品种的鲜重分别降低了14%，而四分之一强度生理盐水分别使绿柳和红柳的鲜重分别降低了24%和38%。然而，中等营养胁迫(半强度NS)使红柳叶片中总抗坏血酸、绿原酸、菊苣、咖啡酰-中酒石酸、总酚酸和花色苷的含量分别比对照和全强度NS提高了266%、199%、124%、251%、162%和380%。结论营养适量胁迫和合理的品种选择是提高封闭式无土栽培生菜的植物化学物质含量，优化其常年生产的有效手段。(三)2019年化学工业学会
BACKGROUND Through precise control of the nutrient solution (NS), closed soilless systems enable targeted manipulation of plant secondary metabolites, which constitute health-promoting components of the human daily diet. A nutrient film technique (NFT) system was employed to assess the effect of NS macronutrient-based concentration (full, half-, and quarter-strength corresponding to electrical conductivity (EC) of 1.5, 0.75, and 0.5 dS m(-1)) on the bioactive profile of red and green-pigmented Salanova (R) butterhead lettuce. RESULTS Half-strength NS reduced fresh biomass of both cultivars by 14%, whereas quarter-strength NS reduced the fresh biomass of green and red Salanova by 24% and 38%, respectively. However, moderate nutrient stress (half-strength NS) boosted red Salanova total ascorbic acid, chlorogenic, chicoric, caffeoyl-meso-tartaric, total phenolic acids, and anthocyanins concentrations by 266%, 199%, 124%, 251%, 162%, and 380%, respectively compared with the control, full-strength NS. CONCLUSIONS Nutritional eustress and appropriate cultivar selection are effective means to increase phytochemical content and optimize year-round production of lettuce in closed soilless systems. (c) 2019 Society of Chemical Industry