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Seed - Coggle Diagram
Seed
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Flowers
Origin
Ancestral flower
Bisxual, radi symmetric, many petals whorls
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Trends
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Floral axis is short, no spiral arrange, floral parts fused
Ovary super to infer, perianth become differe.. in calys & corolia
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Structure
Perfect, complete
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has sepals, sterile. pestals, sterile. stamens=male. carpels=female
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sepals (calyx)
outermost appendages, leaves surrounding flower parts
protects flower bud as it grows, colorful
Petals(Corolla)
above sepals on receptacle, leaf-like but has pigment, no chlorophyll
Attract pollinators, sep & pet=perianth
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Stamen(Androecium)
Above petals, anther and filament
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spores-mitosis-resistent cell wall, Micgametophyte=pollen grain
Carpels(gynoecium)
megasp'phyll, stigma catch pollen grain, style elva'stigma
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modification
Carpels position
Whorls relative to ovary sup'er=carpel above, infe'er=carpel below. Receptacle surrounds carpel
Perianth & stamen- Hypogynous= on receptacle beneath ovary. ex-lily. Epigynous= top of ovary. ex-apple. Perigynous= adnate to calyx. ex-chery
Imperfect flower
Lacks whorl of sexual organs. Hermaphroditic= perfect. Monoecious= male(andro) & female(gyno) on same plant. Dioec= male on plant & female on diff pant.
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Scent
Signal to pollinators, scent glands=roses
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Benzaldehyde(almond), linalool(lavend'), Beta ocimene(green)
Shape
Floral symm', actinomorphic=radial. eg: sunflo'
Zygomorphic=irregular, bilateral. eg: pea
Bloom time
Diurnal= day, Nocturnal=Night
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Types
Major syndromes
Abiotic= Anemo(wind), hydro(water)
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Anemophily
No bright colors, spec' odors, or nectar. Small. No petals.
Stamen & stigma exposed to air. Large # pollen. stigma-feathery to catch pollen from wind. Pollen= light, smooth, airborne.
Hyro
Copious pollen, small flo, long filament for pollen transfer, oblong & heavier pollen
Melitto
Full of nectar. Blue, yellow petals. Can see red only in UV. sweet aromatic or minty fragrance. Day. Landing space. Bilateral. tubular flowers with nectar at base of tube
Psycho
Cluster + landing space. Red, Yell, Orang. Day. Ample nectar deeply hidden. Nec' guides present. Goldenrods+spirea
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Myo
Pale, dull to dark brown or purp'. Rotting meat,carrion, dung,humus, sap & blood. Nectar dont guide presen'. Produce pollen. funnel-like or complex traps flower
Saprophily, for carrion mimics
Ornitho
Petals curve out of way. Tubes, funnels, cups. Strong perching. Red, yell, orang. odorless. Poor sense of smell. Day. Prolific, hidden nectar. Pollen dust on head after nectar found
Chiroptero
Night. 1-3.5 in. pale or white. fragrant, fermenting or fruit-like odor. copious dilute nectar
Cantharo
Bowl-shaped, sexual organs exposed. White, dull white, green. Fruity strong. Day. moderate nectar producers. Solitary flowers; magnol, pond lilies. clusters of small flo. goldnrods, spirea
Deception
May look, smell like pollinator. Trickery. No reward. Saprophily included
Fruits
After double fertil
primary endosperm nucleus divides forming endosperm. Zygote devel' in embryo. integuments devel' into seed coat. Ovary wall & structure devel' into fruit
Fruit formation
Ovary or potions of flo' or inflorescence devel' into fruit. Ovary wall= Thickens & differ- Exocarp, mesocarp, endocarp= pericarp
Accessory fruits
Has accessory tissue. Tissue besides ovary is in fruit. can be simple, aggregate or multiple
Parthenocarpic fruit
Devel' without fertili' or seed. eg; banana, seedless watermelon
Simple
Single carpel. 2+ united carpels. eg; beans, Cherry, tomato. Fleshy= berries, drupes, pomes. Dry= dehiscent, indehiscent
Aggregate
Apocarpous gynoecium. Carpel retains its identify in mature state. eg; magno, raspbe,strawb
Multiple
From an inflorescence. Combined gynoecia of many flowers. ex; fig, mulberry, pineapple
Seed desposal
Wind
Wings, parachutes, lightweight seeds
Water
Buoyant(float), large airspace, ex; coconut
Animal-Active
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Origins
Seed plants
Gymno, seed ferns,progymno=extinct,Angio
Innovation
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Pollen capture= pollen chamber, micropyle
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Ovule evolution
From shoot apex, Similar genes
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Enclosed ovule
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Stamnostoma huttonese, Gnetopsiselliptica
Primitive ovule
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Moresnetia zalesskyi 8-10lobes fused, wide
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Reduced
Angiosperm, 3-celled=tube cell, generative cell
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Direct delivery
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Pollen tube=directed by synergids(2 in Angio),feeds on nucellus(Gymno), feeds on style(angio)
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Pollen
Microgametophyte, some with air bladder
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Double-fertilization
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1 sperm fuses with egg. 2n, zygote
1 sperm fuses with polar nuclei. 3n, endosperm
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Ovule diversity
Gymno Vs Angio
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Both single megaspore, 1 integ, 2 integuments
Unique to angiosperm= protection, double fertilization
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Gymno
Nested doll, Megaspore wall
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1 microsporocyte, pollen chamber