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Horticulturae
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LED Lighting in Vegetable Crops
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LED Lighting in Vegetable Crops

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Vegetable Production Systems".

Deadline for manuscript submissions: closed (10 May 2023) | Viewed by 13652

Special Issue Editors

Dr. Zhonghua Bian

E-Mail Website
Guest Editor
Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China
Interests: LED lighting; vertical farming; vergetable production and nutrient management
Special Issues, Collections and Topics in MDPI journals
Dr. Kai Cao

E-Mail Website
Guest Editor
Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Interests: LED lighting; vertical farming; vergetable production and nutrient management
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Light is not only the driving force for plant photosynthesis but also acts as an important transduction signal in modulating plant growth and endogenous substance metabolism. With the rapid advances in light-emitting diodes (LEDs), light environment regulation using LED light has been a vital strategy in improving vegetable crop yield and quality. With the monochromatic spectrum and flexible and controllable characteristics, LEDs provide great advantages in revealing the mechanism of light (light quality, light intensity, and photoperiod or light duration) on vegetable growth and development. Knowledge obtained in this research topic can provide useful information for high-quality production and artificial light design for greenhouse and vertical farming growth systems.

The aims of this Special Issue are to put forward important research on plant photobiology in vegetable production, presenting recent developments and important accomplishments of LED lighting in vegetable crops. Submissions of original research, reviews, mini-reviews, and methods on the following sub-themes are welcome but not limited to:

  • Physiological mechanisms, including response to LED lighting;
  • Antioxidants and secondary metabolites;
  • Yield and quality trait improvement of vegetables;
  • Light–signal transduction;
  • Transcriptomic studies;
  • Postharvest.

Prof. Dr. Zhonghua Bian
Dr. Kai Cao
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Horticulturae is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • LED lighting
  • yield and quality trait improvement
  • energy-saving technology
  • plant physiology
  • molecular mechanism

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Published Papers (3 papers)

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Research

11 pages, 638 KiB  
Article
Effects of Light-Emitting Diodes (LEDs) on Growth, Nitrates and Osmoprotectant Content in Microgreens of Aromatic and Medicinal Plants
by Hamza El Haddaji, Mustapha Akodad, Ali Skalli, Abdelmajid Moumen, Said Bellahcen, Sliman Elhani, Miguel Urrestarazu, Mitja Kolar, Jernej Imperl, Petranka Petrova and Mourad Baghour
Horticulturae 2023, 9(4), 494; https://doi.org/10.3390/horticulturae9040494 - 14 Apr 2023
Cited by 7 | Viewed by 2816
Abstract
Microgreens are receiving increasing attention due to their high content of bioactive components and their importance to human health. These emerging food products can be obtained from the seeds of different plant species, including aromatic herbs. Aromatic microgreens are gaining popularity as new [...] Read more.
Microgreens are receiving increasing attention due to their high content of bioactive components and their importance to human health. These emerging food products can be obtained from the seeds of different plant species, including aromatic herbs. Aromatic microgreens are gaining popularity as new functional food products. In this study, we investigated the effects of different light-emitting diode (LED) lamp spectra on the growth, pigments, nitrates, and osmoprotectant content of microgreens of Ocimum basilicum L., Trigonella foenum-graecum, Anethum graveolens, and Anthriscus cerefolium plants. Three types of artificial LED lamps were used: T0 as artificial white light, T1 as a continuous light-emitting diode with a longer blue wavelength, and T2 as a continuous light-emitting diode with a longer red wavelength. The results obtained showed that the three types of LED light had significant effects on the different parameters studied. In relation to growth parameters, such as fresh weight (FW) and microgreen height (H), the T2 treatment was most effective for fenugreek, dill, and chervil. However, in basil plants, FW and H values were higher under T1 treatment. Regarding nitrate accumulation, both T1 and T2 treatments reduced the content of this nutrient in the different species studied here. Finally, levels of chlorophyll, carotenoid, glucose, proline, and proteins were all higher in plants cultivated under T1 and T2 treatments than in control plants. Full article
(This article belongs to the Special Issue LED Lighting in Vegetable Crops)
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10 pages, 1550 KiB  
Article
Effect of Low R:FR Ratio on Nitrogen Assimilation and NRT Gene Expression in Pakchoi under Excessive Nitrate Stress
by Xiaoting Zhou, Yirong Gan, Chenxiang Jiang, Qiang Chen, Xu Chen, Libang Chen and Zhongqun He
Horticulturae 2023, 9(2), 159; https://doi.org/10.3390/horticulturae9020159 - 27 Jan 2023
Cited by 1 | Viewed by 1652
Abstract
Nitrate accumulation is a major factor for the secondary salinization of greenhouse soil in China. Our previous study pointed out that a low ratio of red:far-red light (R:FR) can improve salt tolerance in pakchoi under excessive nitrate stress. However, the nitrogen metabolism mechanism [...] Read more.
Nitrate accumulation is a major factor for the secondary salinization of greenhouse soil in China. Our previous study pointed out that a low ratio of red:far-red light (R:FR) can improve salt tolerance in pakchoi under excessive nitrate stress. However, the nitrogen metabolism mechanism is still unclear. To detect the effect of a low R:FR ratio on nitrogen metabolism of pakchoi under excessive nitrate stress, two extra additions of nitrogen of 80 mmol·L−1 NO3− (H80) and 160 mmol·L−1 NO3− (H160) with/without a low R:FR ratio (R:FR = 0.7) were set, and the growth index, chlorophyll content, key enzymes in nitrogen metabolism, nitrate and glutamic acid content and NRT gene expression level of pakchoi leaves were examined. The results indicated that a low ratio of R:FR could alleviate the reduction in growth and chlorophyll content in pakchoi under high-level nitrogen stress (H80 and H160). The activity of nitrate reductase (NR), glutamine synthetase (GS) and glutamine synthetase (GOGAT) decreased under H80 and H160 conditions, except of NR with the H80 treatment. The activity of glutamate dehydrogenase (GDH) increased under H80 treatment, but decreased under H160 treatment. However, the activity of GDH decreased further by reducing the ratio of R:FR. Excessive nitrate stress increased the nitrate content, and a low R:FR ratio could inhibit nitrate accumulation. However, the change in glutamic acid content was significantly increased under a low R:FR ratio without stress. Under the high-nitrogen level treatment (H160), the use of a low ratio of R:FR increased NRT gene expression. Therefore, a low R:FR ratio (R:FR = 0.7) could effectively promote the growth of pakchoi and improve its nitrogen metabolism, thus alleviating the stress effect of a high level of nitrogen in pakchoi. Full article
(This article belongs to the Special Issue LED Lighting in Vegetable Crops)
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15 pages, 3336 KiB  
Article
Effect of Red and Blue Light on Cucumber Seedlings Grown in a Plant Factory
by Dezhi Jin, Xiaofeng Su, Yuefeng Li, Mingming Shi, Bobo Yang, Wenchang Wan, Xing Wen, Shaojun Yang, Xiaotao Ding and Jun Zou
Horticulturae 2023, 9(2), 124; https://doi.org/10.3390/horticulturae9020124 - 17 Jan 2023
Cited by 16 | Viewed by 8541
Abstract
Light-emitting diodes (LEDs) have been regarded as the best artificial source of light for a plant factory. However, the effect of light quality on seedling production in such environments requires further study. On the basis of the practical application of light on cucumber [...] Read more.
Light-emitting diodes (LEDs) have been regarded as the best artificial source of light for a plant factory. However, the effect of light quality on seedling production in such environments requires further study. On the basis of the practical application of light on cucumber seedlings (Ansha Company) in plant factories, the present investigation tracked and recorded the specific effects of red and blue light on the growth of the seedlings by analyzing the photo-biological mechanism involved. The growth parameters, as well as the photosynthetic characteristics of cucumber seedlings, were measured at different variations of light quality. The results showed that when the proportion of red light in the light source was higher than blue light, the height of the seedlings, leaf size, stem diameter, Dixon Quality Index (DQI), relative chlorophyll content, and the net photosynthetic rate were higher than those of the experimental group with a relatively high proportion of blue light. In the case of R7B3 (70% red light and 30% blue light), the stem diameter, DQI, and net photosynthetic rate of seedlings were 14%, 57%, and 22% higher than the minimum value, respectively. The present study analyzed the influence of red and blue light on plant growth characteristics during actual production and provides standardization for it. Full article
(This article belongs to the Special Issue LED Lighting in Vegetable Crops)
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