Effects of Different Light Sources on Shoot to Root Ratio and Intumescence Incidence in Tomato Seedlings Grown in a Commercial Closed Seedling Production System

Document Type : Research paper

Author

Department of Agriculture, Fukushima University, Japan

Abstract

Intumescence is a physiological disorder in which cell walls are disrupted. Intumescence causes leaf deformation, browning and defoliation, and commonly affects tomato plants. This is a limitation in seedling production. The causes of intumescence are not known; however, ultraviolet (UV) deficiency is considered as one of the causes of intumescence. Other possible causes include high humidity and rapid changes in the water environment. In this study, tomato seedlings were grown in a commercially-available closed seedling production system under either newly installed LEDs with a low UV light intensity or conventional fluorescent lamps sources. The relationship between the shoot/root (S/R) ratio and incidence of intumescence was evaluated. In addition, the effects of different light sources were evaluated on the xylem pressure potential in the seedlings under rapidly fluctuating water conditions. As a result, the S/R ratio of seedlings grown under LEDs, with low UV intensity, was greater than that of seedlings grown under fluorescent lamps. There was a positive correlation between the S/R ratio and the incidence of intumescence of four types of seedlings with different combinations of light sources and varieties. Xylem pressure potential decreased more in seedlings grown under LEDs, compared to seedlings grown under fluorescent lamps and dry conditions, but increased significantly when irrigated. These results suggest that reducing the occurrence of intumescence in seedling production systems can be possible by a light source that can help seedlings grow with small S/R ratios and reduce fluctuations in the water condition. 

Keywords

References

Bekhzod K, Joon KK, Kyoung SP, Hyo GC, Sun YL. 2014. Effect of monochromatic UV-A LED irradiation on the growth of tomato seedlings. Horticulture, Environment, and Biotechnology 55, 287-292.
Chun C, Kozai T. 2001. A closed transplant production system, a hybrid of scaled-up micro propagation system and plant factory, Journal of Plant Biotechnology 3(2), 59-66.
Craver JK, Miller CT, Williams KA, Boyle DL. 2014. Characterization and comparison of lesions on ornamental sweet potato 'Blackie', tomato 'Maxifort', interspecific geranium 'Caliente Coral', and bat-faced cuphea 'Tiny Mice'. Journal of American Society for Horticultural Science 139, 603-615.
Eguchi T, Hernández R, Kubota C. 2016. Far-red and blue light synergistically mitigate intumescence injury of tomato plants grown under ultraviolet-deficit light environment. HortScience 51, 712-719.
Hernández R, Eguchi T, Kubota C. 2016. Tomato seedling physiological responses under different percentages of blue and red photon flux ratios using LEDs and cool white fluorescent lamps. Scientia Horticulturae 213(14), 270-280.
Jishi, T, Matsuda R, Fujiwara K. 2016. Blue light monochromatic irradiation for 12 h in lighting pattern with combinations of blue and red light elongates young cos lettuce leaves and promotes growth under high daily light integral. HortScience 56(8): 940-945.
Kubota C, Eguchi T, Kroggel M. 2017. UV-B radiation dose requirement for suppressing intumescence injury on tomato plants. Scientia Horticulturae 226, 366-371.
Lang SP, Struckmeyer BE, Tibbitts TW. 1983. Morphology and anatomy of intumescence development on tomato plants. Journal of American Society for Horticultural Science 108, 266-271.
Lang SP, Tibbitts TW. 1983. Factors controlling intumescence development on tomato plants. Journal American Society for Horticultural Science 108, 93-98.
Misu H, Mori M, Okumura S, Kanazawa S, Ikeguchi N, Nakai R. 2018. High-quality tomato seedling production system using artificial light. SEI Technical Review 86, 119-124.
Masuda K, Nakashima H, Miyasaka J, Ohdoi K. 2021 Quantification of the effects of alternating and simultaneous red and blue irradiations on plant morphology and shoot fresh weight in leaf lettuce ‘Greenwave’. Environmental Control in Biology 59(4), 181-19059.
Miyama Y, Yasui N. 2021 Varietal differences in tomato intumescence under changing water conditions. Environmental Control in Biology 59(3) 157-163.
Moosavi-Nezhad M, Reza Salehi, Sasan Aliniaeifard, Georgios Tsaniklidis, Ernst J. Woltering, Dimitrios Fanourakis, Krystyna Zuk-Gołaszewska Hazem M. Kalaji. 2021. Blue light improves photosynthetic performance during healing and acclimatization of grafted watermelon seedlings. International Journal of Molecular Sciences, 22(15), 8043.
Ohashi-Kaneko K, Takase M, Kon N, Fujiwara K, Kurata K. 2007. Effect of light quality on growth and vegetable quality in leaf lettuce, spinach and komatsuna. Environmental Control in Biology 45(3) 189-198.
Ohyama K, Kozai T, Chun C. 2003. Development ofclosed-type transplant production system and its application. Journal of Society of High Technology in Agriculture 15(1), 1-10. (in Japanese with English Abstract)
Ozawa C, Tonooka C, Kiriiwa Y, Suzuki K. 2018. Cultivar difference in occurrence of edema in tomato. Horticultural Research (Japan) 17, 436 (in Japanese).
Suzuki K, Ozawa C, Kiriiwa Y. 2020. Morphological study on the incidence of intumescence injury in tomato plant leaves. The Horticulture Journal 89(5), 593-601.
Wu Q, Park S, Kirkham MB, Williams KA. 2017. Transcriptome analysis reveals potential mechanisms for inhibition of intumescence development by UV radiation in tomato. Environmental and Experimental Botany 134, 130-140.
International Journal of Horticultural Science and Technology
Volume 10, Special issue (Light in horticulture)
Special issue :Impact of light on crop production and quality
December 2023
Pages 1-8

Files

History

  • Receive Date: 22 January 2022
  • Revise Date: 05 March 2022
  • Accept Date: 08 April 2022

Share

How to cite

Statistics