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Article|17 Nov 2023|OPEN
The red/far-red light photoreceptor FvePhyB regulates tissue elongation and anthocyanin accumulation in woodland strawberry 
Qi Gao1,2 , Shaoqiang Hu1,2 , Xiaoli Wang1,2 and Fu Han1,2 , Huifeng Luo3 , Zhongchi Liu4 , Chunying Kang,1,2 ,
1National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan, 430070, China
2Hubei Hongshan Laboratory, Wuhan, 430070, China
3Institute of Horticulture, Hangzhou Academy of Agricultural Sciences, Hangzhou, 310024, China
4Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, 20742, USA
*Corresponding author. E-mail: ckang@mail.hzau.edu.cn

Horticulture Research 11,
Article number: uhad232 (2024)
doi: https://doi.org/10.1093/hr/uhad232
Views: 101

Received: 01 Aug 2023
Accepted: 01 Nov 2023
Published online: 17 Nov 2023

Abstract

Light is an important environmental signal that influences plant growth and development. Among the photoreceptors, phytochromes can sense red/far-red light to coordinate various biological processes. However, their functions in strawberry are not yet known. In this study, we identified an EMS mutant, named P8, in woodland strawberry (Fragaria vesca) that showed greatly increased plant height and reduced anthocyanin content. Mapping-by-sequencing revealed that the causal mutation in FvePhyB leads to premature termination of translation. The light treatment assay revealed that FvePhyB is a bona fide red/far-red light photoreceptor, as it specifically inhibits hypocotyl length under red light. Transcriptome analysis showed that the FvePhyB mutation affects the expression levels of genes involved in hormone synthesis and signaling and anthocyanin biosynthesis in petioles and fruits. The srl mutant with a longer internode is caused by a mutation in the DELLA gene FveRGA1 (Repressor of GA1) in the gibberellin pathway. We found that the P8 srl double mutant has much longer internodes than srl, suggesting a synergistic role of FvePhyB and FveRGA1 in this process. Taken together, these results demonstrate the important role of FvePhyB in regulating plant architecture and anthocyanin content in woodland strawberry.