Background

Sprouts and microgreens, which are tender, flavourful, rich in nutrients, have a short growth cycle, and have been recognized as functional foods in the human diet. Culturing under artificial light sources could regulate the growth, the phytochemical compound content and antioxidant capacity of sprouts and microgreens.

Scope and approach

In this review, the effects of light-emitting diode (LED) on growth, phytochemical compound content and antioxidant capacity, as well as the post-harvest quality of sprouts and microgreens were overviewed, and the underlying mechanisms were discussed. The future applications and research, which aim to improve the growth and nutritional quality of sprouts and microgreens, were also investigated.

Key findings and conclusions

LED light can promote the accumulation of different phytochemicals, such as phenolic compounds, vitamins, glucosinolates, chlorophyll and carotenoids. Meanwhile, the antioxidant capacity could also be significantly increased by growth under LED light, in particular UV-B light. The accumulation of mineral elements (Ca²⁺, Fe²⁺, K⁺) increased after light exposure. The effects of LED light on the growth was species dependent. Therefore, growth under LED light is an efficient and promising strategy for producing sprouts and microgreens with higher nutritional values.

中文翻译：

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发光二极管（LED）光对芽苗菜和微绿植物养分的影响综述

背景

嫩芽，嫩绿色，嫩滑，美味，营养丰富，生长周期短，并且被认为是人类饮食中的功能食品。在人工光源下培养可以调节芽苗和绿苗的生长，植物化学成分的含量和抗氧化能力。

范围和方法

本文综述了发光二极管（LED）对生长，植物化学化合物含量和抗氧化能力以及芽和微绿的收获后品质的影响，并探讨了其潜在机理。还研究了未来的应用和研究，其目的是提高芽苗菜和微绿植物的生长和营养质量。

主要发现和结论

LED灯可以促进各种植物化学物质的积累，例如酚类化合物，维生素，芥子油苷，叶绿素和类胡萝卜素。同时，抗氧化剂能力还可以通过在LED光特别是UV-B光下的生长而显着提高。暴露后矿物质元素（Ca 2 ⁺，Fe 2 ⁺，K ⁺）的积累增加。LED光对生长的影响取决于物种。因此，在LED灯下生长是生产具有较高营养价值的新芽和微型蔬菜的有效且有前途的策略。