Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in Tomato
The recent development of light-emitting diodes (LEDs) and their application in modern horticulture stimulated studies demonstrating that additional far-red (FR) radiation (700–800 nm) increases plant dry mass. This effect of FR has been explained by improved photosynthesis and/or plant architecture...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-01-01
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| Series: | Frontiers in Plant Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fpls.2020.614714/full |
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| author | Yongran Ji Theoharis Ouzounis Henk J. Schouten Richard G. F. Visser Leo F. M. Marcelis Ep Heuvelink |
| author_facet | Yongran Ji Theoharis Ouzounis Henk J. Schouten Richard G. F. Visser Leo F. M. Marcelis Ep Heuvelink |
| author_sort | Yongran Ji |
| collection | DOAJ |
| description | The recent development of light-emitting diodes (LEDs) and their application in modern horticulture stimulated studies demonstrating that additional far-red (FR) radiation (700–800 nm) increases plant dry mass. This effect of FR has been explained by improved photosynthesis and/or plant architecture. However, the genotypic variation in this response is largely unknown. Here, we aim to explore and explain the genotypic variation in growth responses to additional FR. We expected the genotypic variation in the responses of plant dry mass to additional FR. Further, we hypothesized that a significant improvement of both net assimilation rate (NAR) and leaf area ratio (LAR) is responsible for a strong dry mass increase under additional FR, while some genotypes respond only marginally or even negatively in NAR or LAR under FR, thus resulting in a weak FR effect on plant dry mass. To test these hypotheses, we grew 33 different tomato genotypes for 21 days with 0, 25, or 100 μmol m–2 s–1 of FR added to a common white + red LED background lighting of 150 μmol m–2 s–1. Genotypes responded similarly with respect to plant height, stem dry mass, and shoot:root ratio; i.e., they all increased with increasing FR. However, the response of total plant dry mass varied among genotypes. We categorized the genotypes into three groups (strongly, moderately, and weakly responding groups) based on their relative response in total plant dry mass to FR. Growth component analysis revealed that the strongly responding genotypes increased strongly in NAR rather than LAR. The weakly responding genotypes, however, showed a substantial increase in LAR but not NAR. The increase in LAR was due to the increase in specific leaf area. Leaf mass fraction, which is the other component of LAR, decreased with FR and did not differ between groups. In conclusion, tomato genotypes that increased strongly in NAR in response to FR were able to achieve a more substantial increase in dry mass than did other genotypes. This is the first study to explain the differences in growth responses of a large number of tomato genotypes toward FR in their light environment. |
| first_indexed | 2024-12-24T05:37:30Z |
| format | Article |
| id | doaj.art-f5f472be38524036aeef9d72ee544947 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-24T05:37:30Z |
| publishDate | 2021-01-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Plant Science |
| spelling | doaj.art-f5f472be38524036aeef9d72ee5449472022-12-21T17:12:59ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2021-01-011110.3389/fpls.2020.614714614714Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in TomatoYongran Ji0Theoharis Ouzounis1Henk J. Schouten2Richard G. F. Visser3Leo F. M. Marcelis4Ep Heuvelink5Horticulture and Product Physiology, Department of Plant Sciences, Wageningen University & Research, Wageningen, NetherlandsHorticulture and Product Physiology, Department of Plant Sciences, Wageningen University & Research, Wageningen, NetherlandsPlant Breeding, Department of Plant Sciences, Wageningen University & Research, Wageningen, NetherlandsPlant Breeding, Department of Plant Sciences, Wageningen University & Research, Wageningen, NetherlandsHorticulture and Product Physiology, Department of Plant Sciences, Wageningen University & Research, Wageningen, NetherlandsHorticulture and Product Physiology, Department of Plant Sciences, Wageningen University & Research, Wageningen, NetherlandsThe recent development of light-emitting diodes (LEDs) and their application in modern horticulture stimulated studies demonstrating that additional far-red (FR) radiation (700–800 nm) increases plant dry mass. This effect of FR has been explained by improved photosynthesis and/or plant architecture. However, the genotypic variation in this response is largely unknown. Here, we aim to explore and explain the genotypic variation in growth responses to additional FR. We expected the genotypic variation in the responses of plant dry mass to additional FR. Further, we hypothesized that a significant improvement of both net assimilation rate (NAR) and leaf area ratio (LAR) is responsible for a strong dry mass increase under additional FR, while some genotypes respond only marginally or even negatively in NAR or LAR under FR, thus resulting in a weak FR effect on plant dry mass. To test these hypotheses, we grew 33 different tomato genotypes for 21 days with 0, 25, or 100 μmol m–2 s–1 of FR added to a common white + red LED background lighting of 150 μmol m–2 s–1. Genotypes responded similarly with respect to plant height, stem dry mass, and shoot:root ratio; i.e., they all increased with increasing FR. However, the response of total plant dry mass varied among genotypes. We categorized the genotypes into three groups (strongly, moderately, and weakly responding groups) based on their relative response in total plant dry mass to FR. Growth component analysis revealed that the strongly responding genotypes increased strongly in NAR rather than LAR. The weakly responding genotypes, however, showed a substantial increase in LAR but not NAR. The increase in LAR was due to the increase in specific leaf area. Leaf mass fraction, which is the other component of LAR, decreased with FR and did not differ between groups. In conclusion, tomato genotypes that increased strongly in NAR in response to FR were able to achieve a more substantial increase in dry mass than did other genotypes. This is the first study to explain the differences in growth responses of a large number of tomato genotypes toward FR in their light environment.https://www.frontiersin.org/articles/10.3389/fpls.2020.614714/fullfar redgenotypic variationgrowth analysisLED lightingSolanum lycopersicum |
| spellingShingle | Yongran Ji Theoharis Ouzounis Henk J. Schouten Richard G. F. Visser Leo F. M. Marcelis Ep Heuvelink Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in Tomato Frontiers in Plant Science far red genotypic variation growth analysis LED lighting Solanum lycopersicum |
| title | Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in Tomato |
| title_full | Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in Tomato |
| title_fullStr | Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in Tomato |
| title_full_unstemmed | Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in Tomato |
| title_short | Dissecting the Genotypic Variation of Growth Responses to Far-Red Radiation in Tomato |
| title_sort | dissecting the genotypic variation of growth responses to far red radiation in tomato |
| topic | far red genotypic variation growth analysis LED lighting Solanum lycopersicum |
| url | https://www.frontiersin.org/articles/10.3389/fpls.2020.614714/full |
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