plants-seeds-2 - epicotyl pulls plumule out from between...

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Seeds and germination - the broad bean To understand seed structure and germination, it is easiest if large seeds, such as peas and beans, are studied. testa position of radicle micropyle hilum* (a) External appearance radicle cotyledon testa cotyledon plumule radicle micropyle (b) Testa removed (c) Longitudinal section testa splits radicle emerges epicotyl elongates radicle grows down into soil
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Unformatted text preview: epicotyl pulls plumule out from between cotyledons once above soil, epicotyl straightens and the leaves open out epicotyl pulls plumule backwards through soil, so leaves are not damaged Germination of the broad bean Broad bean seed * The hilum is the scar left by the seed’s attachment to the pod lateral roots develop 2 Broad bean © D.G. Mackean...
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