Acclimating Cucumber Plants to Blue Supplemental Light Promotes Growth in Full Sunlight

• DOI: 10.3389/fpls.2021.782465
• Publication Date: 2021-12-01T13:14:56Z
• Authors: Chenqian Kang; Yuqi Zhang; Ruifeng Cheng; Elias Kaiser; Qichang Yang; Tao Li
• Keywords: Photoinhibition; Sunlight; Light intensity; Photosynthetic capacity; Cucumis; Photoprotection

Raising young plants is important for modern greenhouse production. Upon transfer from the raising to production environment, should maximize light use efficiency while minimizing deleterious effects associated with exposure high (HL) intensity. The spectrum may be used establish desired traits, but how acclimated a given respond HL intensity less well explored. Cucumber (Cucumis sativus) seedlings were grown in low-intensity sunlight (control; ∼2.7 mol photons m-2 day-1) and treated white, red, blue, or green supplemental (4.3 10 days. Photosynthetic capacity was highest leaves blue light, followed by green, positively correlated leaf thickness, nitrogen, chlorophyll concentration. Acclimation different spectra did not affect rate of photosynthetic induction, under showed faster induction relaxation non-photochemical quenching (NPQ) alternating LL Blue-light-acclimated reduced photoinhibition after exposure, as indicated maximum quantum yield photosystem II photochemistry (F v /F m ). Although days had similar shoot biomass, blue-light-grown (B-grown plants) more compact morphology smaller areas shorter stems. However, subsequent, week-long full (10.7 day-1), B-grown area 15% higher compared that been other spectra. growth blue-light-acclimated mainly due highly regulated NPQ performance intermittent solar light. can improve diminish which benefit plant growth.