Seed development in Trimenia (Trimeniaceae) and its bearing on the evolution of embryo‐nourishing strategies in early flowering plant lineages

William E. Friedman; Julien Bachelier

doi:10.3732/ajb.1200632

April 26, 2013American Journal of Botany

Seed development in Trimenia (Trimeniaceae) and its bearing on the evolution of embryo‐nourishing strategies in early flowering plant lineages

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Key Points

To clarify whether seeds of the ancient angiosperm family Trimeniaceae utilize a maternal perisperm or a biparental endosperm for embryo nourishment, resolving evolutionary hypotheses about early flowering plants.
Examined seed developmental stages from fertilization through maturity and dormancy in Trimenia moorei.
Analyzed structural features of maturing fruits in Trimenia neocaledonica.
A persistent layer of nucellar tissue remains around the endosperm but lacks stored nutrients and does not serve as a functional perisperm.
Nutrient storage and embryo nourishment in Trimenia are performed entirely by the endosperm, matching all other examined Austrobaileyales.
The diploid endosperm of Trimenia functions similarly to the triploid endosperm of modern angiosperms rather than the minute diploid endosperm of Nymphaeales.

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Implication

Morphological analysis reveals endosperm-driven nourishment without perisperm in Trimenia, suggesting ancestral nutritional strategies in early flowering plants.

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Friedman et al. (2013) studied this question.

synapsesocial.com/papers/6a9c20918239e631fdcc69c7 https://doi.org/10.3732/ajb.1200632

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Seed development in Trimenia (Trimeniaceae) and its bearing on the evolution of embryo‐nourishing strategies in early flowering plant lineages

Key Points

No abstract yet

Implication

Discussion

Cite This Study

Seed development in Trimenia (Trimeniaceae) and its bearing on the evolution of embryo‐nourishing strategies in early flowering plant lineages

Key Points

No abstract yet

Implication

Discussion

Cite This Study

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