14 - Plant structure and function The central question that...

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Plant structure and function
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The central question that we address next is: how do plants function efficiently in environments that differ greatly in water availability and temperature?
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Before we can address this question in detail, we need to review some basic aspects of plant structure and function. The vegetative body of a typical angiosperm consists of roots, stems, and leaves.
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Roots are involved in water and nutrient uptake and in support (or anchoring). Stems are involved in the transport of water, nutrients, sugars, etc. between the roots and leaves and in support. Leaves carry out photosynthesis.
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Please read pages 744-760 in the text for a discussion of roots and stems (plus other topics). With respect to leaves, the basic structural features are illustrated in Figure 34.23 in the text.
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*With respect to transport in plants: - xylem is involved in the transport of water and nutrients, and - phloem is involved in the transport of sugars produced by photosynthesis and of other compounds
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prevent water vapor from diffusing out of the leaf. Unfortunately, the cuticle also prevents CO 2 from diffusing into the leaf. This situation represents a major dilemma for plants, as CO
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14 - Plant structure and function The central question that...

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