Two seed genes team up to manage nitrogen in thale cress
Seed Saving
The nitrogen stored in a seed decides how vigorously a seedling starts, so the seeds you save from your own garden plants carry a nitrogen-handling system scientists are only now untangling.
Seeds have to store nitrogen, the building block of protein, and use it well when they sprout. Researchers found that two genes in thale cress, a small weedy relative of mustard and cabbage, work together in seeds: one helps build amino acids and the other appears to sense them. Together they seem to help the seed manage its nitrogen supply.
Key Findings
1
The glutamine synthetase gene GLN1;5 and the ACT domain repeat gene ACR1 show a functional interaction in Arabidopsis seeds.
2
The interaction occurs at the seed level, pointing to a role in seed nitrogen metabolism.
3
The work identifies a link between nitrogen assimilation enzymes and amino acid-sensing proteins in seed biology.
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Technical Summary
Two genes in the model plant thale cress work together in seeds: one helps process nitrogen into amino acids, the other senses amino acid levels. Their interaction suggests seeds tune nitrogen handling to guide early development, which could inform work on seed quality and nitrogen use.
Arabidopsis thaliana, the thale cress, mouse-ear cress or arabidopsis, is a small plant from the mustard family (Brassicaceae), native to Eurasia and Africa. Commonly found along the shoulders of roads and in disturbed land, it is generally considered a weed.
