BIOA02H3 Lecture Notes - Lecture 3: Phloem, Chemical Warfare, Xylem
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BIOA02H3 Full Course Notes
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Lec 3 - (growth) plants vs animals: indeterminate (cuz meristem) vs determinate; undifferentiated cells -> undifferentiated cells + differentiated cells => indeterminate growth vs undifferentiated cells -> differentiated cells (e. g. male. 959 cells) => determinate growth (tallest plant) redwood & sequoia: plants that s taller than statue of liberty & size of ~3-4 blue whale (oldest plant) bristlecone pines: 5064 yrs. @ plant: meristem factors limiting plant growth: missing soil nutrients, meristematic slowdown ( ageing of plant), increase in height = require increase in hydrolic pressure -> top - desiccation, meristem eaten by animal/plants -> x growth. Meristem: gp of meristematic cells; cd - more meristematic & differentiated cells. Secondary meristem - many diff ones @ diff locations. Pm vs sm: sam & ram vs others (bottom to top) root apical meristem (ram) -> lateral root meristem (lrm) - > adventitious meristem (adm) -> vascular cambium (vc) -> axillary meristem (axm) -> shoot apical meristem (sam)
