Roots - Roots roottypes2types taproot - enlarged radical...

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Roots root types  - 2 types taproot - enlarged radical root in most dicots o smaller lateral roots branch off o stores food, reaches for water deep underground fibrous roots - mass of small roots, in most monocots o extensive, clings to soil o prevents erosion root structure  - split into 4 regions root cap - made of inner columella cells, outer root cap cells o columella cells - function in perception of gravity o protects tissues behind it as it grows o golgi bodies secrete slimy substance to outside >> eases root through soil o constantly replaced by new cells zone of cell division - where cells divide ever 12-36 hours o daughter cells of apical meristem o quiescent center - group of cells at the center of apical meristem, divides slowly o inner cell layer >> endodermis, intercellular flow of water zone of elongation - cells from primary meristems elongate >> roots lengthen o small vacuoles merge/grow >> occupies 90% of cells’ volume o no more size increase beyond zone of elongation
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Roots - Roots roottypes2types taproot - enlarged radical...

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