Plant Circulation and Transport Mycorrhizae Root hairs Macronutrients for plants C, H, O, N, K, Ca,...
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Transcript of Plant Circulation and Transport Mycorrhizae Root hairs Macronutrients for plants C, H, O, N, K, Ca,...
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Plant Circulation and Transport
• Mycorrhizae
• Root hairs
• Macronutrients for plants
• C, H, O, N, K, Ca, P, Mg, S
• Micronutrients for plants
• Fe, Cl, Cu, Mn, Zn, Mo, B
• Xylem
• Vessel Member
• Tracheids
• Transpiration
• Factors that Affect
• Humidity
• Temperature
• Sunlight
• Wind
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Plant Circulation and Transport
• Phloem• Sieve-tube members• Companion cells.• Phloem loading• Active transport• Role of xylem and water• Source to Sink flow• Translocation
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Plant Reproduction
• Importance of flowers• Importance of pollen• Importance of seeds• Sepals• Petals• Stamen
– Anther
– Filament
• Pistil– Stigma– Style– Ovary
Pollen must physically fit the stigma for pollination to occur. Important for species recognition.
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The Flower
• Adaptations• Coevolution• UV markings• Nectaries• Perfect Flowers• Imperfect Flowers• Monoecious• Diecious
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Angiosperm Reproduction
• Meiosis• Occurs in anthers and
ovaries.• Forms haploid spores.• Microspores in the anthers.• Megaspores in the ovaries.• These divide by mitosis to
form haploid, multicellular gametophytes.
• These form embryo sacs and pollen grains.
• Fertilization• Pollen tube• Ovule develops into a
seed.• Ovary develops into a
fruit.
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Other information concerning plants
• Seed dispersal mechanisms
• Seed coat
• Germination
• Cotyledons
• Vegetative propagation
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Plant Hormones
• Auxins--Promote cell elongation; stimulates division in the vascular cambium, promotes flowering and fruit formation.
• Gibberellins—Stimulate cell division and elongation, inhibit seed formation, stimulate flowering and pollen-tube growth, ends dormancy, increases fruit size.
• Cytokinins—Promote cell division in stems; facilitates healing of wounds, prolongs life of leaves, flowers, and fruits.
• Ethylene gas—regulates metabolism, promotes fruit ripening, regulate shedding of leaves and flowers.
• Abscisic Acid—Inhibits growth, promotes dormancy & stomate closure.
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Plant Responses
• Photoperiodism• Phytochrome• Tropisms• Phototropisms• Role of auxins• Gravitropism• Positive and negative
examples
• Thigmotropism• Tendrils
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