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Transport213-page1 - plant In addition plant structure and...

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Transport in Plants - 1 During the past few weeks, we examined the structure of the “higher” plant body, with occasional references to the functions of plant systems. In the next few days we shall look at how plants are adapted for resource acquisition and to: Maintain water balance and transport water throughout the plant Transport nutrients and solutes to cells and tissues Obtain nutrients for growth and survival from their substrate and from the atmosphere Regulate growth and developmental activities o Chemical signals o Environmental signals Respond to environmental challenges As we look at these subjects, keep in mind how other organisms with which you are more familiar accomplish these same functions. Resource Acquisition Vascular Plant Transport The plant vascular system functions to transport water and minerals throughout the
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Unformatted text preview: plant. In addition, plant structure and function is optimized for the process of photosynthesis – to efficiently obtain water, CO 2 and light energy in the photosynthetic regions of the plant, primarily leaves, a subject briefly addressed in Biology 211, and reviewed here. Shoot Structure and Light Acquisition As discussed earlier, stems elevate the plant above ground and serve for the attachment of leaves. Phyllotaxy, the arrangement of leaves on the stem, is typically optimized for maximum light capture for photosynthesis, and the typical plant has a spiral phyllotaxy, with leaf primordia placement chemically controlled by the shoot tip meristem....
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