Control of early plant development by light quality

Abstract

This thesis describes how different colours of light affect various aspects of the growth and development of Arabidopsis and tomato plants⁠. In the first chapter, we review the current knowledge of light receptors and different light-regulated processes⁠. In the second chapter we investigated the effect of direct illumination of roots⁠. In the third chapter we presented an overview of the phenotypes that arise when plants are grown in white, red or blue light⁠. In the fourth and fifth chapter we further investigate the stem and flowering phenotypes that were observed in the different light conditions⁠. Altogether we show that red and blue light often act antagonistically, and that some light-regulated processes may be species- or age-specific⁠.

Light qualityLED lightsArabidopsis thalianaSolanum lycopersicumRoot developmentFloweringApical growthRadial growth