CONIFERS Pines (Pinus). Abies (Fir) Pseudotsuga (Douglas Fir)
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Transcript of CONIFERS Pines (Pinus). Abies (Fir) Pseudotsuga (Douglas Fir)
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CONIFERS
Pines (Pinus)
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Abies (Fir)
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Pseudotsuga (Douglas Fir)
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Picea (Spruce)
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Juniperus (Juniper)
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Cupressus (Cypress)
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Sporophyte
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Primary Growth: Shoot Apex
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Primary Growth: Stele
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Endarch Xylem Development
Primary Growth: Xylem
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(Circular Bordered Pits)
Fig. 17-17 in Gifford and Foster 1989
Xylem: Tracheids
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Xylem: Bordered Pit Pairs
Fig. 17-17 in Gifford and Foster 1989
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Phloem: Sieve Elements = Sieve Cells
Fig. 3-18 in Gifford and Foster 1989
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Leaf Anatomy I
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Leaves: One Vein versus Two Veins
Soft Pines (Pinon Pines, Southwestern White Pine)
Hard Pines (Ponderosa Pine,Chihuahua Pine)
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Leaf Anatomy II
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Conifer Shoot Secondary Growth
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Roots
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Root Primary Growth
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Root Secondary Growth
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Megasporogenesis: Megastrobilus(Bract, Ovuliferous Scale)
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MegasporogenesisOvule (= Integument + Megasporangum), Megasporocyte (2n)
(Bract, Ovuliferous Scale)
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Fig. 17-28 in Gifford and Foster 1989
Putative Origin of Compound Female Cone I(Lebachia, Ernestiodendron)
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Putative Origin of Compound Female Cone II(Pseudovoltzia, Voltzia)
Fig. 17-29 in Gifford and Foster 1989
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Megasporogenesis: Meiosis, 4 Megaspores (1n)
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Integument
Micropyle
Megasporangium
Pollen Chamber
Functional Megaspore
Megasporogenesis: Meiosis, 4 Megaspores (1n)
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Megagametogenesis: Free Nuclear Stage
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Megagametogenesis: Cellular Stage (with Archegonia)
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Megagametogenesis: Archegonia
1-6 Archegonia / Gametophyte
1-2 Tiers of Four Neck Cells
Egg Cell Covered by Layer of Cells
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Microsporogenesis(Microsporophyll, Microsporangium)
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Microsporogenesis(Microsporophyll, Microsporangium)
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Microsporogenesis(Microsporophyll, Microsporangium)
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Fig. 23-24 in Bold et al. 1987
Microgametogenesis I(Inside the Microsporangium)
• Prothallial Cell 1• Prothallial Cell 2• Generative Cell• Tube Nucleus
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Microgametogenesis II(After Pollination)
Fig. 23-24 in Bold et al. 1987
• Generative Cell (Ultimately, Body Cell and Stalk Cell)• Body Cell (Ultimately, Sperm Cells 1 and 2)• Stalk Cell
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Fertilization
Fig. 17-37a in Gifford and Foster 2010
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Early Embryogeny
Fig. 17-37 C-G in Gifford and Foster 1989
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Early Embryogeny
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Fig. 17-37 H-I in Gifford and Foster 1989
Embryonal Suspensors
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Fig. 17-37 J in Gifford and Foster 1989
Cleavage Polyembryony
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Mature Embryo inside Seed
Fig. 17-36 in Gifford and Foster 2010
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Ponderosa Pine Seeds
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Pine Reproductive Cycle
Fig. 17-30 in Gifford and Foster 1989