Monday March 22

Monday March 22 - Concept 35.4: Secondary growth adds girth...

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Secondary growth - Occurs in stems and roots of woody plants - The secondary plant body consists of tissues produced by the vascular cambium and cork cambium Primary & Secondary Growth of a Stem - Figure 35.19 Vascular Cambium - Figure 35.20 Result of Secondary Growth Heartwood: older layers of secondary xylem - No longer transport water - Often clogged with resins Sapwood: younger layers of xylem - Still transports water The bark of a tree contains phloem. Bark Bark - All the tissues external to the vascular cambium - Includes secondary phloem and periderm Cork Cambium - Gives rise to the secondary plant body’s protective covering, or periderm Lenticels - Areas in the periderm where gas exchange with the outside air can occur Resource Acquisition and Transport in Vascular Plants Chapter 36 Concept 36.1: Land plants acquire resources above and below ground - CO2 in O2 out rough stomata - Water lost from leaves by transpiration
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This note was uploaded on 03/27/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Monday March 22 - Concept 35.4: Secondary growth adds girth...

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