Claim · model-written summary
Toxin expression blocked sperm development before final division and left one sperm-like cell per pollen tube.
- Taxon
- Arabidopsis (Arabidopsis thaliana)
Arabidopsis thalianae0 - Organ / stage
- pollen tubese0
- Treatment
- Expression of the potent translation inhibitor, diphtheria toxin A subunite0
- Gene
- HAP2(GCS1)e0
- Outcome
- sperm developmente0
- Direction
- blockede0
- Comparator
- two sperme0
Not reportedMaterialCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression of the potent translation inhibitor, diphtheria toxin A subunit, from the Arabidopsis (Arabidopsis thaliana) HAP2(GCS1) promoter blocked sperm development before the final cell division, resulting in pollen tubes that carried a single sperm-like cell rather than two sperm.”
Title
Aubrey C. Frank; Mark A. Johnson PLANT PHYSIOLOGY 2009. doi:10.1104/pp.109.144204
Other claims from this paper (7)
- Observation Single-cell pollen tubes targeted ovules and fertilized either egg or central cell.
- Observation Fertilization yielded seeds with either endosperm or embryo, but not both.
- Observation Endosperm-only seeds significantly outnumbered embryo-only seeds.
- Mechanism Authors infer preferential central-cell fusion by single sperm-like cells.
- Mechanism Authors infer that de novo translation is required to complete sperm development.
- Observation Authors infer tight control of the HAP2(GCS1) promoter.
- Mechanism Disrupted gene expression can bias male germ-cell gamete fusion.