BIOL 1015 Lecture Notes - Lecture 12: Flowering Plant, Monocotyledon, Suberin
4 Apr 2016
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Cells produce a waterproof filler called lignin that fills the space between cells. Can give rise to more stem cells, or to differentiated cells. Primary meristem (apical): tips in buds, tips of roots (length) Ground meristems (all plant organs have some kind of ground tissue) a. Very think cell walls with lots of lignin. Ex: sandy feeling grains in fruits like pears, or hard seed coats. Conducts water and solutes by transpiration (one way-roots to shoots) Dead when mature with lots of lignin left over (lignin=wood) Transports sugars, hormones, other solutes dissolved in water up and down a. Companion cells (control cytoplasm of sieve cells, works harmoniously t from sunny side to shady side for cellular respiration) Cortex = ground tissue n and all around = sly to translocate sugars e way) to the branches. *iclicker* besides water regulation, of what use is the waxy casparian strip to the roots of plan.
