Basic Plant Parts: Root - absorbing/anchoring organ (sometimes
Transcript of Basic Plant Parts: Root - absorbing/anchoring organ (sometimes
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Plant Morphology
Basic Plant Parts:
Root - absorbing/anchoring organ (sometimes
storage)
Stem - supportive, conductive organ (sometimes
storage)
Leaf - photosynthetic organ (sometimes
modified)
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Shoot= stem + associated leaves
Bud= immature shoot,
usually with protective scale leaves
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Each leafprimordiumdevelops intoone leaf.
Caryota sp.Arecaceae
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Branch= elongated shoot, arising from bud
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Plant Habit
Herb - plant with annual above-ground parts
Vine - weak stems, supported by another pl.
Shrub - woody, >1 trunk
Tree - woody, 1 trunk
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Root Types/Parts
taproot fibrous roots
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Root Types/Parts
storage roots Raphanus sativus, radish
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Stem (Shoot) Types
bulb(mostly leaves)
corm(mostly stem)
both underground storage stems
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Stem (Shoot) Types
horizontal,underground
thickened, storage,develops from
stem tip
long internodes,ends in plantlet
sharp-pointedstem
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Leaf Structural Type
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Leaf Structural Type
Stipular Spine - Euphorbia spp. (Euphorbiaceae)
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Leaf Structural Type
Leaf Spine (arising from areole) - Cactaceae
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Leaf Structural Type
Tendril - Lathyrus (Fabaceae)
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Leaf Structural Type
Bract-modified, usually reduced leaf
associated with flowers
Bud Scale-modified leaf functioning to protect apical meristem of bud
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Leaf Type / Parts
simple - blade not divided into leaflets
compound-leaf divided into discrete leaflets
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Leaf Type / Parts
simple pinnatelycompound
bipinnatelycompound
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Leaf Type / Parts
ternate/trifoliolate
palmate
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leaf arrangement
alternatespiral
1 leaf / node
opposite2 leaves / node
whorled3+ leaves / node
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Leaf Venation
2 major types:parallel - monocotsnetted - eudicots
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vestiture
= cover of plant "hairs" (trichomes)
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glaucous - waxy coating
viscid - sticky secretion
glabrous - smooth, with no trichomes
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