Bio1b Summer 2008 Eric Harris Plants Lecture 6 Page 1 of 2 PLANTS LECTURE 6 THE PLANT BODY I SHOOTS Reading 7th ed 720 723 728 8th ed 746 747 749 754 A The archetypal plant introduction to the shoot root system B Shoot System i Structure stem node internode leaves axillary buds ii Determinate vs indeterminate growth iii Shoot Apical Meristem established in embryogeny responsible for primary growth elongation leaf primordia bud primordia early tissues protoderm ground meristem procambium iv Shoot in cross section monocot vs dicot v Patterns of leaves phyllotaxis C Leaf Morphology i Petiole blade base ii Types simple compound how to distinguish iii Arrangement of Veins iv Anatomy epidermis cuticle stomata palisade spongy parenchyma trichomes vascular tissue D Modifications of the Stem Leaf i Stems rhizomes bulbs stolons tubers ii Leaves tendrils spines storage insect capture Updated on 07 31 08 Bio1b Summer 2008 Eric Harris Plants Lecture 6 Page 2 of 2 E Secondary Growth i Primary growth growth in length as a result of apical meristems Secondary growth growth in width as a result of lateral meristems ii Lateral meristems a k a cambia singular cambium Two types vascular cambium the cork cambium iii Origin function of the vascular cambium Secondary tissues 2 xylem 2 phloem Rays Annual rings iv Monocots lack a vascular cambium v Cork cambium periderm modes of origination Bark lenticels vi Consequences of secondary growth Updated on 07 31 08
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