7-stemsoutl - a dicots b monocots primary thickening...

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AG V03: Plant Biology - Stems (Ch 7) © copyright 2011 Marta D. de Jesus some of this will be review I. What is stem? A. vegetative organ B. provides C. How do stems start? 1. in the seed a. in dicots epicotyl hypocotyl b. in monocots c. internodes nodes D. How do stems grow longer? 1. terminal buds a. main shoot apex b. other branches 2. axillary buds 3. leaf scars 4. bud scales 5. Q: What happens if the main shoot apex is killed? 6. Q: What is a difference between a woody bush/shrub and tree? pruning E. How do they grow wider? 1. with primary growth a. protoderm b. ground meristem c. procambium d. primordium 2. lateral/secondary meristems: a. cork cambium
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b. vascular cambium II. Variations on primary growth of stems A. groups of flowering plants/angiosperms
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Unformatted text preview: a. dicots b. monocots primary thickening meristem B. other variations C. arrangement of leaves = phyllotaxy 1. alternate 2. opposite 3. whorled 4. spiral D. traces & gaps 1. leaf trace 2. leaf or bud gap III. Wood & Bark A. found in B. first year of tree branch C. second year D. third year E. details to note 1. slice 2. from vascular cambium in 3. springwood summerwood 4. heartwood sapwood 5. different woods 6. new xylem & phloem 7. outside of vascular cambium IV. Specialized stems A. above-ground variations 1. tendrils or hooks 2. thorns 3. cladophyll 4. runners B. partially or all below-ground variations 1. bulb 2. corm 3. tuber 4. rhizome...
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7-stemsoutl - a dicots b monocots primary thickening...

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