Year: 2025
Type: article
Abstract: GIGANTEA (GI) is a plant-specific protein that functions in many physiological processes and signalling networks. In Arabidopsis, GI has a central role in circadian oscillators regulating the abundance of ZEITLUPE and TIMING OF CAB EXPRESSION 1 proteins and is essential for photoperiodic regulation of flowering. We have investigated how ortholgues of this component of Arabidopsis circadian oscillators contribute to circadian rhythms and yield traits, including heading (flowering) in wheat. We find that GI is a core component of wheat circadian oscillators that is necessary to maintain robust oscillations in chlorophyll fluorescence and circadian oscillator transcript abundance. The predicted lack of functional GI results in later flowering of wheat in both long days and short days in controlled environment conditions. Our results support and extend previous work, which suggests that the pathways by which photoperiodism regulates flowering are not fully conserved between Arabidopsis and wheat. Understanding the molecular basis for photoperiodism in wheat is important for breeders looking to manipulate flowering time and develop new elite, high-yielding cultivars.
Source: Plant Cell & Environment
DOI: 10.1111/pce.15447
Institution: University of Cambridge
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: hybrid
Estimated APC paid: $5,440
Awards: Interdependent regulation between photosynthesis and circadian rhythms in cereals, G2400861517, G2840169902, The role of circadian oscillators in temperature responses of wheat, G35544783, BBSRC-CASE Studentship, G5330140934, Cambridge Doctoral Training Partnership - 2, The role of sugar-responsive bZIP transcription factors in the regulation of the circadian oscillator of Arabidopsis, Genetic analysis of the effect of circadian clock genes on yield components in Wheat, G8306750531, G8756350212
OpenAlex ID: W4407987570