Far-red and blue light synergistically mitigate intumescence injury of tomato plants grown under ultraviolet-deficit light environment

Tomomi Eguchi, Ricardo Hernández, Chieri Kubota

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Intumescence injury is an abiotic-stress-induced physiological disorder associated with abnormal cell enlargement and cell division. The symptom includes blister-or callus-like growths on leaves, which occur on sensitive cultivars of tomato when they are grown under ultraviolet (UV)-deficit light environment, such as light-emitting diodes (LEDs). Previous studies suggest that intumescence can be reduced by increasing far-red (FR) or blue light. In the present study, effects of end-of-day FR (EOD-FR) light and high blue photon flux (PF) ratio during the photoperiod on intumescence injury were examined using ‘Beaufort’ interspecific tomato rootstock seedlings (Solanum lycopersicum × Solanum habrochaites), a cultivar highly susceptible to intumescence injury. Our study showed that EOD-FR light treatment moderately suppressed intumescence injury. Using EOD-FR light treatment, the percent number of leaves exhibiting intumescences was reduced from 62.0-70.7% to 39.4-43.1%. By combining high blue PF ratio (75%) during the photoperiod and EOD-FR light treatment, the percent number of leaves exhibiting intumescences was further suppressed to 5.0%. Furthermore, the combination of high blue PF ratio and EOD-FR light treatment inhibited undesirable stem elongation caused by EOD-FR light treatment. We found that high blue PF ratio during the photoperiod combined with a small dose of EOD-FR lighting (≈1 mmol·mL-2·µL-1 provided by 5.2 mmol·mL-2·sL-1 FR PF for 3.3 minutes) could inhibit the problematic intumescence injury of tomato plants grown under LEDs without negatively influencing growth or morphology.

Original languageEnglish (US)
Pages (from-to)712-719
Number of pages8
JournalHortScience
Volume51
Issue number6
StatePublished - Jun 1 2016

Fingerprint

far-red light
blue light
tomatoes
photoperiod
Solanum habrochaites
blisters
leaves
Solanum lycopersicum
cultivars
stem elongation
signs and symptoms (plants)
abiotic stress
rootstocks
lighting
cell division
cell growth
callus
photons
seedlings
dosage

Keywords

  • Blue light
  • Edema
  • End-of-day
  • Far-red light
  • LED
  • Light quality
  • Oedema
  • Solanum habrochaitas
  • Solanum lycopersicum
  • Transplants

ASJC Scopus subject areas

  • Horticulture

Cite this

Far-red and blue light synergistically mitigate intumescence injury of tomato plants grown under ultraviolet-deficit light environment. / Eguchi, Tomomi; Hernández, Ricardo; Kubota, Chieri.

In: HortScience, Vol. 51, No. 6, 01.06.2016, p. 712-719.

Research output: Contribution to journalArticle

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abstract = "Intumescence injury is an abiotic-stress-induced physiological disorder associated with abnormal cell enlargement and cell division. The symptom includes blister-or callus-like growths on leaves, which occur on sensitive cultivars of tomato when they are grown under ultraviolet (UV)-deficit light environment, such as light-emitting diodes (LEDs). Previous studies suggest that intumescence can be reduced by increasing far-red (FR) or blue light. In the present study, effects of end-of-day FR (EOD-FR) light and high blue photon flux (PF) ratio during the photoperiod on intumescence injury were examined using ‘Beaufort’ interspecific tomato rootstock seedlings (Solanum lycopersicum × Solanum habrochaites), a cultivar highly susceptible to intumescence injury. Our study showed that EOD-FR light treatment moderately suppressed intumescence injury. Using EOD-FR light treatment, the percent number of leaves exhibiting intumescences was reduced from 62.0-70.7{\%} to 39.4-43.1{\%}. By combining high blue PF ratio (75{\%}) during the photoperiod and EOD-FR light treatment, the percent number of leaves exhibiting intumescences was further suppressed to 5.0{\%}. Furthermore, the combination of high blue PF ratio and EOD-FR light treatment inhibited undesirable stem elongation caused by EOD-FR light treatment. We found that high blue PF ratio during the photoperiod combined with a small dose of EOD-FR lighting (≈1 mmol·mL-2·µL-1 provided by 5.2 mmol·mL-2·sL-1 FR PF for 3.3 minutes) could inhibit the problematic intumescence injury of tomato plants grown under LEDs without negatively influencing growth or morphology.",
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