English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Summary  The endosperm plays a pivotal role in the integration between component tissues of molecular signals controlling seed development. It has been shown to participate in the regulation of embryo morphogenesis and ultimately seed size determination. However, the molecular mechanisms that modulate seed size are still poorly understood especially in legumes.   DASH   (  DOF  Acting in Seed embryogenesis and Hormone accumulation ) is a  DOF  transcription factor ( TF ) expressed during embryogenesis in the chalazal endosperm of the  Medicago truncatula  seed. Phenotypic characterization of three independent  dash  mutant alleles revealed a role for this  TF  in the prevention of early seed abortion and the determination of final seed size. Strong loss‐of‐function alleles cause severe defects in endosperm development and lead to embryo growth arrest at the globular stage. Transcriptomic analysis of  dash  pods versus wild‐type ( WT ) pods revealed major transcriptional changes and highlighted genes that are involved in auxin transport and perception as mainly under‐expressed in  dash  mutant pods. Interestingly, the exogenous application of auxin alleviated the seed‐lethal phenotype, whereas hormonal dosage revealed a much higher auxin content in  dash  pods compared with  WT . Together these results suggested that auxin transport/signaling may be affected in the  dash  mutant and that aberrant auxin distribution may contribute to the defect in embryogenesis resulting in the final seed size phenotype.

DASH transcription factor impacts Medicago truncatula seed size by its action on embryo morphogenesis and auxin homeostasis