Blue light dose-responses of leaf photosynthesis, morphology, and chemical composition of Cucumis sativus grown under different combinations of red and blue light

The blue part of the light spectrum has been associated with leaf characteristics which also develop under high irradiances. In this study blue light dose-response curves were made for the photosynthetic properties and related developmental characteristics of cucumber leaves that were grown at an equal irradiance under seven different combinations of red and blue light provided by light-emitting diodes. Only the leaves developed under red light alone (0% blue) displayed dysfunctional photosynthetic operation, characterized by a suboptimal and heterogeneously distributed dark-adapted F v /F m , a stomatal conductance unresponsive to irradiance, and a relatively low light-limited quantum yield for CO 2 fixation.…

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  Nederlandse Organisatie voor Wetenschappelijk Onderzoek
• SV
  Stichting voor de Technische Wetenschappen