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ULTRASTRUCTURE OF PLASTID INHERITANCE: GREEN ALGAE TO ANGIOSPERMS

1. Plastid inheritance in most green algae and land plants is uniparental. In oogamous species, plastids are usually derived from the maternal parent; even when inheritance is biparental, maternal plastids usually predominate. Only a few species of conifer are known to have essentially paternal plastid inheritance. In spite of the overall strong maternal bias, there exists a spectrum of species in which plastid inheritance ranges from purely maternal to predominantly paternal.