AI Article Synopsis
- Seed size is influenced by both genetic factors and environmental signals, with a specific gene called SSW1 on chromosome 1 identified as a key regulator in Arabidopsis.
- The SSW1 allele is linked to larger seeds that have higher amino acid and storage protein contents, and it shows better transport efficiency compared to its counterparts.
- Under low nitrogen conditions, the SSW1 allele not only enhances seed yield but also improves nitrogen use efficiency, indicating a role in geographical adaptation and a potential avenue for agricultural improvements.
Article Abstract
Seed size is controlled not only by intrinsic genetic factors but also by external environmental signals. Here, we report a major quantitative trait locus (QTL) gene for seed size and weight on chromosome 1 (SSW1) in Arabidopsis, and we found SSW1 acts maternally to positively regulate seed size. Natural variation in SSW1 contains three types of alleles. The SSW1 allele produces larger seeds with more amino acid and storage protein contents than the SSW1 allele. SSW1 displays higher capacity for amino acid transport than SSW1 due to the differences in transport efficiency. Under low nitrogen supply, the SSW1 allele exhibits increased seed yield and nitrogen use efficiency (NUE). Locations of natural variation alleles of SSW1 are associated with local soil nitrogen contents, suggesting that SSW1 might contribute to geographical adaptation in Arabidopsis. Thus, our findings reveal a mechanism that coordinates seed growth and NUE, suggesting a potential target for improving seed yield and NUE in crops.
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| http://dx.doi.org/10.1016/j.celrep.2024.114150 | DOI Listing |
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