29topic_15_f07

29topic_15_f07 - Seed Structure, Germination and Seedling...

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Unformatted text preview: Seed Structure, Germination and Seedling Development Topic 15 Topic 15 Angiosperm Angiosperm Reproduction: Reproduction: Arabidopsis germination Seed Structure As the embryo develops food reserves are deposited within either the endosperm or the cotyledons depending on the particular species Seed Structure The stalk ( funiculus ) connecting the ovule to the ovary wall separates from the ovule leaving a scar, the hilium , on the seed surface. Seed Structure The seed coat which is derived from the integuments becomes hard thereby sealing the embryo and stored food within a protective cover Seed Structure Dicot embryos have two cotyledons and monocot embryos have one cotyledon . Cotyledons can either be organs for food storage or for absorption of food from other parts of the seed. pea seedling cotyledons cotyledons pea seedling plumule plumule epicotyl epicotyl cotyledon cotyledon primary root primary root Seed Structure Above the attachment point of Above the attachment point of...
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29topic_15_f07 - Seed Structure, Germination and Seedling...

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