Effect of LED light and stem training methods on morphological and biochemical characteristic of greenhouse grafted tomato

Articles in Press

Document Type : Full Paper

Authors

1 Department of Horticultural Science, College of Agriculture, Shahid Chamran University of Ahvaz, Khuzestan, Iran.

2 Department of Horticultural Science, College of Agriculture, University of Tehran, Karaj, Iran

3 Department of Horticultural Science, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran

10.22059/ijhs.2024.373618.2159

Abstract

Grafting of vegetables is a new management technique that is widely used with the aim of preventing biotic and abiotic stresses in fruit and vegetables in greenhouses. For this purpose, ‘SV4129TH’ the cultivar was used as a scion grafted onto the ‘Emperdor’ rootstock. Two- and three-stem grafted seedlings along with non-grafted ones (control) for 30 days in a completely controlled environment under four LED light treatments including pure red, pure blue, white (full spectrum) and the combination of red and Blue (30% to 70%) were placed in separate tiers. Results reveal that the combination of red and blue light (RB) is the most suitable light source for increasing the quality of grafted tomato seedlings. Seedlings were grown for 30 days under different sub-spectrums of LED light and evaluated. The results showed that morphological traits such as height, stem diameter and number of leaves were significantly increased by 10.28, 13.16 and 65% respectively in grafted multi-stemmed plants compared to non-grafted single-stemmed plants. The yield and average of single fruit in two-stem and three-stem grafted plants, were 3.2 – 4.1% and 16.17-27% higher than non-grafted single stem plants. Biochemical characteristics such as lycopene, soluble solids and vitamin C increased by 30, 9.1 and 9.58% in grafted plants, respectively, compared to non-grafted plants. The amount of acidity in non-transplanted plants was equal to 0.67%, which was higher than that of grafted plants. The best option in terms of productivity and production was the grafted tomatoes with three-stems, which yielded 11.9 kg per plant.

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Iranian Journal of Horticultural Science

Articles in Press, Accepted Manuscript
Available Online from 13 July 2024

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History

  • Receive Date: 07 March 2024
  • Revise Date: 09 July 2024
  • Accept Date: 13 July 2024

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