6-rootsoutl - 3. aerial 2 a. climbing b. photosynthetic 4....

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AG V03: Plant Biology - Roots (Ch 6) © copyright 2011 Marta D. de Jesus I. Structure A. types of roots 1. radicle 2. tap root systems a. tap roots b. branch roots 3. fibrous root systems 4. adventitious roots 5. woody roots B. root tip 1. root cap 2. root apical meristem quiescent center 3. region of elongation 4. region of maturation root hair zone 5. primary meristems a. protoderm b. procambium c. ground meristem C. young root cross-section (dicot) 1. epidermis 2. cortex 3. unique tissues 1
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a. endodermis Casparian strip b. exodermis c. pericycle branch roots 4. vascular tissue a. primary xylem diarch, triarch, tetrarch, polyarch b. primary phloem 5. pith 6. branch roots = lateral roots 7. woody roots natural grafting II. Root functions A. general 1. 2. 3. 4. B. special 1. food storage 2. water storage
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Unformatted text preview: 3. aerial 2 a. climbing b. photosynthetic 4. prop 5. buttress 6. asexual reproduction 7. contractile 8. pneumatophores C. symbioses 1. parasitic haustoria 2. mutualistic a. mycorrhiza(e) ectomycorrhiza(e) endomycorrhiza(e) b. nitrogen (N 2 ) fixation nodules cyanobacteria III. Soils A. Overall 1. soil horizons a. topsoil humus b. subsoil, c. parent material 3 B. How does rock become soil? 1. weathering 2. add organic materials C. inorganic component (dirt) 1. particles 2. types of soils a. light/porous soils b. heavy soil D. water in soil hygroscopic gravitational capillary E. how pH affects plants & soil plant requirements symbiont requirements cation exchange & available minerals 4...
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6-rootsoutl - 3. aerial 2 a. climbing b. photosynthetic 4....

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