ArticlePlant biotechnology journal2025
ZmCCD8 regulates sugar and amino acid accumulation in maize kernels via strigolactone signalling.
Article in Plant biotechnology journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed.
- Mapping and Functional Characterization of Homologous Genes AhSUCA06 and AhSUCA16 Underlying Sucrose, Oil and Protein Contents in Peanut (Arachis hypogaea L.).Plant biotechnology journal · 2026Article
- Comprehensive analysis of the effects of foliar application of the synthetic strigolactone analog GR24 during the growth period on postharvest quality and metabolic indicators of pak choi.Food chemistry: X · 2026Article
- Integrated physiological and transcriptomic measurements reveal changes in the accumulation and partitioning of storage reserves after prevention of pollination in maize.BMC plant biology · 2026Article
- Article
- SnRK2.6 phosphorylates sucrose transporter ZmSUT1 to enhance yield by modulating leaf senescence in maize.Science advances · 2026Article
- Regulating female ear morphogenesis in maize by uniconazole and 5-aminolevulinic acid for yield improvement.Scientific reports · 2026Article
- Strigolactones Regulate Sugar Allocation to Control Rice Tillering and Root Development via the OsSPL14-OsSHR1-OsSWEET16 Pathway.Plant biotechnology journal · 2026Article
- Calcium application synergistically enhances yield and nutritional quality in waxy maize.Frontiers in plant science · 2026Article
- Regulatory Mechanisms of Free Umami Amino Acid Accumulation in Fresh Waxy Kernels: Insights from Transcriptome and Metabolomics Analyses.Foods (Basel, Switzerland) · 2025Article
- Nitrogen Deficiency Outperforms Water Stress in Triggering Strigolactone-Dependent Responses in Maize.Physiologia plantarumArticle
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23 authors.
Funding
Abstract
How carbon (sucrose) and nitrogen (amino acid) accumulation is coordinatively controlled in cereal grains remains largely enigmatic. We found that overexpression of the strigolactone (SL) biosynthesis gene CAROTENOID CLEAVAGE DIOXYGENASE 8 (CCD8) resulted in greater ear diameter and enhanced sucrose and amino acid accumulation in maize kernels. Loss of ZmCCD8 function reduced kernel growth with lower sugar and amino acid concentrations. Transcriptomic analysis showed down-regulation of the transcription factors ZmMYB42 and ZmMYB63 in ZmCCD8 overexpression alleles and up-regulation in zmccd8 null alleles. Importantly, ZmMYB42 and ZmMYB63 were negatively regulated by the SL signalling component UNBRANCHED 3, and repressed expression of the sucrose transporters ZmSWEET10 and ZmSWEET13c and the lysine/histidine transporter ZmLHT14. Consequently, null alleles of ZmMYB42 or ZmMYB63 promoted accumulation of soluble sugars and free amino acids in maize kernels, whereas ZmLHT14 overexpression enhanced amino acid accumulation in kernels. Moreover, overexpression of the SL receptor DWARF 14B resulted in more sucrose and amino acid accumulation in kernels, down-regulation of ZmMYB42 and ZmMYB63 expression, and up-regulation of ZmSWEETs and ZmLHT14 transcription. Together, we uncover a distinct SL signalling pathway that regulates sucrose and amino acid accumulation in kernels. Significant association of two SNPs in the 5' upstream region of ZmCCD8 with ear and cob diameter implicates its potential in breeding toward higher yield and nitrogen efficiency.
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