Unformatted text preview: for optimal access to pollinators and dispersal agents. • Stems conduct water and minerals from roots to the leaves and conduct solutes from leaves to storage and use sites. • Stems are responsible for the overall growth (height and girth) of the plant from the primary and secondary shoot meristems There is much variation in stem types and stem anatomy, although there are some common features, which we will discuss. Most secondary growth of plant shoot systems (increase in girth) occurs in stems. (Leaves are generally primary growth structures.) Our discussion of stems will include both internal anatomy and external features of primary and secondary growth in stems. Primary Growth of Stems There are three basic primary growth patterns in stems: • Early growth of most herbaceous eudicot stems and some woody eudicots • Early growth of some woody eudicots • Monocot stems Most woody eudicots Herbaceous eudicots Monocots...
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- Fall '09