Bark - Growing trees, trees with symplast,
have two basic types of bark. Bark is made up of an outer
periderm and an inner phloem. This is above as well as
below ground. Bark keeps moisture and gases in and resists
attack by insects and microorganisms. Trees have many bark
diseases that are poorly understood. Think how many
communities of life live on and in tree bark.
Image Source - TREES, ASSOCIATES, and SHIGO (2 CD set).
Click here for words on bark.
See Bark, inner (phloem) and Bark, outer (periderm)
Picture - A CROSS SECTION
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