Claim · model-written summary
Leaf starch synthesis uses AGPase encoded by leaf-expressed subunits.
Zea maysNot reportedMaterialCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf starch is synthesized via the AGPase encoded by the small and large subunits shown previously to be expressed at abundant levels in the leaf”
t0“maize”
Title
Fundamental differences in starch synthesis in the maize leaf, embryo, ovary and endosperm
Susan K. Boehlein; Janine R. Shaw; Timothy J. Boehlein; et al. The Plant Journal 2018. doi:10.1111/tpj.14053
Other claims from this paper (13)
- Observation Multiple AGPase isoforms function in embryo and ovary.
- Association Embryo starch content depends on genes active in leaf and endosperm.
- Mechanism Shrunken-2 and brittle-2 AGPase synthesizes about 75% of endosperm starch.
- Mechanism agpsemzm and agpllzm encode plastid-localized endosperm AGPase.
- Observation Loss of plastid-localized AGPase does not reduce endosperm starch.
- Mechanism The data suggest AGPase-independent synthesis supplies about 25% of endosperm starch.
- Observation Three maize genes encode the AGPase small subunit.
- Observation The triple small-subunit mutant is lethal in early seed development.
- Observation The triple mutant is viable in male and female gametes.
- Intervention effect Any one of the three small-subunit genes restores seed and plant viability.
- Observation A fourth large-subunit gene is functional.
- Mechanism AGPase is essential for maize viability.
- Observation Starch synthesis differs and is coordinated across maize embryo, ovary, leaf and endosperm.