Abstract
The yield and fruit quality parameters of tomatoes are influenced by environmental conditions, and cultivation systems play an important role in improving quality, apart from breeding. We examined five breeding lines and one cultivar in five cultivation systems for yield and fruit quality parameters. The cultivation systems include a single-glazed greenhouse with and without supplementary LED interlighting; a double-glazed greenhouse with and without supplementary LED interlighting; and an organic cultivation system on the field with a rainout shelter. Plants and fruits grown in the double glazing system showed significantly lower values for plant height, yield, DM, TSS, fructose, glucose, antioxidant capacity (DPPH, TEAC), TPC, calcium, phosphorus, and manganese content than in the single-glazed greenhouse, which can be explained by the lower light transmittance. However, it could be seen that the additional LED interlighting could lower the negative effect on yield and quality traits due to double glazing.
Highlights
Tomato is one of the world’s favorite vegetables, with 182 million tons produced worldwide in 2018 [1]
Experiments were performed during the outdoor tomato season with high solar radiation to integrate the organic low-input cultivation system, though it can be supposed that the effect of glazing and supplemental light-emitting diodes (LED) interlighting could have been more significant during the off season
The results of the sensory attributes did not show any significant difference between the single-glazed greenhouse, with and without additional LED interlighting during summer
Summary
Tomato is one of the world’s favorite vegetables, with 182 million tons produced worldwide in 2018 [1]. It is an important nutrient source for the human diet and rich in antioxidants [2,3]. Due to breeding for increased shelf life, yield, and disease resistance, tomato producers face consumer complaints about unsatisfactory fruits [4]. Different studies have discussed supplemental lighting with light-emitting diodes (LED) as a possibility to maintain plant and fruit quality, while increasing sustainable production in terms of reduced energy consumption [10,11,12]. Increased consumer awareness of food with high nutritional value, has strengthened the focus on the antioxidant capacity of fresh fruits and vegetables [2]. Antioxidants are important to protect cells against damage, which is mediated through oxidative stress, and are important for plants and humans [13]
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