Photosynthetic Processes in Seed Development

Photosynthetic processes within developing seeds contribute directly to the accumulation of storage reserves, influence embryonic patterning and regulate metabolic fluxes that underpin seed viability and vigour. In many species, chloroplast differentiation in early embryogenesis supplies ATP, NADPH and carbon skeletons for biosynthetic pathways, modulates redox status and drives the synthesis of starch, oils and proteins. Maternal photosynthetic tissues, such as silique walls, export photoassimilates to the seed, while the timing of light perception and plastid biogenesis within the embryo coordinates developmental gene networks controlling lipid accumulation. As seeds mature and photosynthetic capacity declines, metabolism shifts towards glycolysis and fermentation pathways to satisfy energy demands during desiccation and dormancy acquisition. Understanding these interdependent processes is essential for improving seed oil yield, nutritional quality and stress resilience.

Research from Nature Portfolio

One foundational study employed comprehensive transcriptome analysis in the biofuel tree Pongamia pinnata to map gene expression across four stages of seed development. Investigation of photoperiod-responsive genes revealed a GI-CO-FT signalling cascade that synchronises chloroplast activity with the onset of floral initiation and embryo maturation. Concurrent profiling of fatty acid biosynthetic genes demonstrated stage-specific upregulation of key enzymes involved in lipid assembly, tightly coordinated with photosynthesis-related transcripts. The integration of these data provides a molecular blueprint for manipulating plastid function to optimise oil composition and yield in developing seeds.

Photosynthetic Processes in Seed Development publication trend

The graph below shows the total number of articles in photosynthetic processes in seed development across all publications each year (not limited to Nature Index journals).

Technical terms

Chloroplast: Semi-autonomous organelle in plant cells where light energy is converted into chemical energy and carbon fixation occurs.

Photoassimilate: Carbon compounds synthesised in photosynthetic tissues that are transported to sinks such as developing seeds.

Silique: Elongated seed pod of Brassicaceae species facilitating nutrient transfer during seed development.

Transcriptome: The complete set of RNA transcripts present in a cell or tissue at a given time, reflecting gene expression patterns.

Proteomics: The large-scale study of proteins, their abundance, modifications and interactions within a biological sample.

References

1. Unravelling molecular mechanisms from floral initiation to lipid biosynthesis in a promising biofuel tree species, Pongamia pinnata using transcriptome analysis. Scientific Reports (2016).
2. Transcriptomic comparison of seeds and silique walls from two rapeseed genotypes with contrasting seed oil content. Frontiers in Plant Science (2023).
3. TMT proteomics analysis of a pseudocereal crop, quinoa (Chenopodium quinoa Willd.), during seed maturation. Frontiers in Plant Science (2022).
4. Light Deprivation-Induced Inhibition of Chloroplast Biogenesis Does Not Arrest Embryo Morphogenesis But Strongly Reduces the Accumulation of Storage Reserves during Embryo Maturation in Arabidopsis. Frontiers in Plant Science (2017).