Galactinol as marker for seed longevity.

Area of Science:

• Plant Science
• Agricultural Science
• Biochemistry

Background:

• Reduced seed longevity increases crop production costs.
• Identifying reliable biomarkers for seed storability is crucial for agriculture.

Purpose of the Study:

• Investigate the correlation between seed galactinol content and seed longevity.
• Determine if galactinol content can serve as a predictive biomarker for seed storability.

Main Methods:

• Analyzed galactinol content and seed longevity in Arabidopsis, cabbage, and tomato.
• Performed quantitative trait loci (QTL) mapping in tomato.
• Utilized reverse genetics with T-DNA knock-out and overexpressor lines in Arabidopsis for key genes in the raffinose family oligosaccharide (RFO) pathway.

Main Results:

• A positive correlation between galactinol content and seed longevity was observed across all tested species.
• A co-locating QTL for galactinol content and seed longevity was identified on chromosome 2 in tomato, with GALACTINOL SYNTHASE as a candidate gene.
• Mutants with reduced galactinol synthase activity exhibited lower seed galactinol content and decreased seed longevity.

Conclusions:

• Seed galactinol content is a conserved and reliable biomarker for seed longevity in Brassicaceae and tomato.
• The raffinose family oligosaccharide (RFO) pathway plays a significant role in determining seed storability.