122 - December 2, 2011 Lecture 9 1. support adaptations a)...

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December 2, 2011 Lecture 9 1. support adaptations a) prop roots: stilts at the base of the stem, source is above ground b) buttress roots: widening of the base of a tree to provide support in a similar way to the prop roots 2. sharp armaments and defense a) spines are modified leaves to reduce the amount of water loss by the plant soft and fleshy in early development b) thorns are modified stems arise above the leaf at each node 3. water storage a) succulent leaves store water b) the leaves are attached to a very short stem c) flowering stems originate from the axils of leaves d) leaves are thick, majority of biomass is water e) aloe plants have succulent leaves that store water f) invasive ice plant has succulent leaves g) succulent stems have nodes and also store water cactus spines = modified leaves 4. movement and exploration a) Virginia creeper Tendrils are modified, twining leaves or stems; these tendrils are unusual in that they
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122 - December 2, 2011 Lecture 9 1. support adaptations a)...

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