Spaninks Kiki, van Lieshout Jelmer, van Ieperen Wim, Offringa Remko
Plant Developmental Genetics, Institute for Biology Leiden, Leiden University, Leiden, Netherlands.
Horticulture and Product Physiology Group, Wageningen University and Research, Wageningen, Netherlands.
Front Plant Sci. 2020 Dec 23;11:599982. doi: 10.3389/fpls.2020.599982. eCollection 2020.
In vertical farming, plants are grown in multi-layered growth chambers supplied with energy-efficient LEDs that produce less heat and can thus be placed in close proximity to the plants. The spectral quality control allowed by LED lighting potentially enables steering plant development toward desired phenotypes. However, this requires detailed knowledge on how light quality affects different developmental processes per plant species or even cultivar, and how well information from model plants translates to horticultural crops. Here we have grown the model dicot (Arabidopsis) and the crop plant (tomato) under white or monochromatic red or blue LED conditions. In addition, seedlings were grown in either light-grown roots (LGR) or dark-grown roots (DGR) LED conditions. Our results present an overview of phenotypic traits that are sensitive to red or blue light, which may be used as a basis for application by tomato nurseries. Our comparative analysis showed that young tomato plants were remarkably indifferent to the LED conditions, with red and blue light effects on primary growth, but not on organ formation or flowering. In contrast, Arabidopsis appeared to be highly sensitive to light quality, as dramatic differences in shoot and root elongation, organ formation, and developmental phase transitions were observed between red, blue, and white LED conditions. Our results highlight once more that growth responses to environmental conditions can differ significantly between model and crop species. Understanding the molecular basis for this difference will be important for designing lighting systems tailored for specific crops.
在垂直种植中，植物种植在多层生长室中，这些生长室配备了节能发光二极管（LED），其产生的热量较少，因此可以放置在靠近植物的位置。LED照明所允许的光谱质量控制有可能使植物发育朝着所需的表型方向发展。然而，这需要详细了解光质如何影响每个植物物种甚至品种的不同发育过程，以及来自模式植物的信息在园艺作物中的转化程度。在这里，我们在白色或单色红色或蓝色LED条件下种植了模式双子叶植物（拟南芥）和农作物（番茄）。此外，幼苗在光生根（LGR）或暗生根（DGR）LED条件下生长。我们的结果概述了对红光或蓝光敏感的表型特征，这可作为番茄苗圃应用的基础。我们的比较分析表明，幼嫩的番茄植株对LED条件的差异不明显，红光和蓝光对其初级生长有影响，但对器官形成或开花没有影响。相比之下，拟南芥似乎对光质高度敏感，因为在红色、蓝色和白色LED条件下，观察到地上部和根部伸长、器官形成以及发育阶段转变存在显著差异。我们的结果再次强调，模式植物和农作物对环境条件的生长反应可能存在显著差异。了解这种差异的分子基础对于设计适合特定作物的照明系统至关重要。
