Blue and far-red light control flowering time of woodland strawberry (Fragaria vesca) distinctively via CONSTANS (CO) and FLOWERING LOCUS T1 (FT1) in the background of sunlight mimicking radiation

Indoor vertical farming is currently a breakthrough horticultural production system. However, for fruit bearing crops such as strawberry, major challenge optimizing light spectral composition to control flowering. We have shown that it possible stimulate flowering and development with different treatments in the day-neutral strawberry accessions Fragaria vesca ‘Yellow Wonder’ YW5AF7 ‘Hawaii-4’. used blue (449 nm) far-red (740 background of sunlight-mimicking photosynthetic active radiation (PAR) under both long- short-day photoperiods. Flower induction was most successful when given during night 24 h. These overruled photoperiodic Both boosted flowering, leading higher yield, minor effects on vegetative plant growth. also evaluated role FvCO FvFT1 using expression analysis RNAi lines, revealed trigger part through conserved cascade. Blue operates FvFT1, partially independently FvCO, while FvCO. Furthermore, transcriptional reporter lines we found ontogenetically tissue-specifically regulated, being exclusively expressed veins older leaves, induced predominantly by light.