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27 Cards in this Set
- Front
- Back
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Four processes govern development |
Determination Differentiation Morphogenesis Growth |
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Plant morphogenesis occurs... |
Through changes of cell division at cytokinesis and can be uneven so plants grow in multiple directions. |
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Plant development is influenced by 3 properties |
Meristems Cell walls Totipotency of most cells |
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Totipotent |
Can differentiate into any kind of cell |
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Apical - basal axis |
Growth pattern is up and down |
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Radial axis |
Growth direction is outward |
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Suspensor |
Becomes the embryo support during the first division of zygote |
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3 tissue systems of vascular plants |
Dermal tissue system Vascular tissue system Ground tissue system |
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Ground tissue system cell types |
Parenchyma, collenchyma, sclerenchyma |
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Parenchyma cells |
Most abundant Large vacuoles, thin cell walls Photosynthesis in shoots Stores proteins in seeds, starch in roots |
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Collenchyma cells |
Elongated Thick cell walls, stem Provide support for growing tissues |
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Sclerenchyma cells |
Walls reinforced with lignin Undergo programmed cell death |
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Vascular tissue system cell types |
Tracheids Vessel elements |
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Tracheids |
Spindle shaped cells that allow movement of water |
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Vessel elements |
Cells that form open pipeline for water |
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Plasmodesmata |
Strand that connects two plant cells |
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Companion cells |
Connected by plasmodesmata to perform phloems metabolic functions |
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Apical meristems build... |
Build primary plant body |
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Indeterminate |
An open ended process when plants grow throughout entire lives |
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Cork cambium |
Prevent water loss in stems and roots in eudicots |
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Periderm |
Made up by cork and cork cambium |
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Protoderm |
Outer layer in roots that produces the epidermis |
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Ground meristem ----> |
Ground tissue system Produces cortex in roots and endodermis |
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Procambium produces... |
Produces vascular tissue system (stele) in roots |
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Mesophyll |
Photosynthetic parenchyma tissue in leaves |
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Meristems produce... |
Produce new roots, stems, leaves, and flowers |
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Stomata |
Where water and gases are exchanged |
