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Plant Transport - Modern Biology - Lecture Slides

Slides, Biology

Post: January 30th, 2013
Description
This lecture is from advanced course of Biology. Key points of the lecture are: Plant Transport, Pump Fluid, Heartwood, Sapwood, Heartwood, Cellular, Lateral Transport, Whole Plant, Short Distance, Long Distance
This lecture is from advanced course of Biology. Key points of the lecture are: Plant Transport, Pump Fluid, Heartwood, Sapwood, Heartwood, Cellular, Lateral Transport, Whole Plant, Short Distance, Long Distance
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gangadatt
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Contents
Plant Transport • How does water get from the roots of a tree to its top? • Plants lack the muscle tissue and circulatory system found in animals, but still have to pump fluid throughout the plant’s body Docsity.com Plant Transport • Water first enters the roots and then moves to the xylem, the innermost vascular tissue • Plants need water – As a starting product for photosynthesis – As a solvent to dissolve chemicals – For support – To ‘pay’ for water lost by transpiration Docsity.com Plant Transport • Heartwood is the xylem that has died; much darker • Sapwood is the younger, outermost wood that has not yet become heartwood; conducts water from the roots to the leaves, and to store Docsity.com Plant Transport • Water movement (transport) occurs at three levels: – Cellular – Lateral transport (short-distance) – Whole plant (long-distance) Docsity.com Plant Transport: Cellular level • Diffusion – movement from an area of high concentratio..

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