Exploiters pt 2

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  • Created by: Tabitha
  • Created on: 20-03-15 17:06
Define Symbiosis
association between organisms attached to each other for mutual benefit
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Bacteria in root nodules
Rhizobium
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How do the roots attract bacteria?
Flavonoids
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Enzyme in Rhiozbium that fixes nitrogen?
Nitrogenase
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Quick explanation of how bacteria enter root
Root hair covered in free living bacteria, infection thread formed curls allowing rhizbia to enter, spread to adjacent cells and mulitplies
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Both names of Legume Family
Leguminosae Fabaceae
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Sub families of Fabaceae
Papilionoideae. Caesalpiniodeae, Miniosoideae
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Explain the legume problem
Large potential, but unpredictable yields due to annual need to N-fix, might not reach required level
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Use of Nodulation in the future
add N-fixation to cereals to save on fertilizers
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Petiole?
Stalk joining leaf to stem
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Axillary Bud
Embryonic shoot thats at junction b/w stem and petiole
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Apical Meristem
Undiff tissue sin buds and growing tips
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Stipule
Small leaf like apprendages (in pairs) at base of stalk
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Stem node
where leaves emerge from stem
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Internode
stem b/w two 2 stem nodes
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Monocot leaf, stem and flower description
Parallel veins to main, strap-like leaf (sugar cane), Numerous bundles scattered throughout stem, flowers in 3's
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Dicot leaf, stem and flower description
Branched (veticulet) veins, can trace smallest to the main vein, bundles arranged in ring, flowers in 4 or 5s
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Method to see vascular bundles
Add stain Phloroglucinol and conc. HCl for 5 mins, Wash in 70% alcohol and mount in dilute glycerine
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Red colour indicts Lignin, What does it do?
Integral part of cell walls
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3 examples of monocots
Maize, Sugar Cane, Hordeum Vulgae (Barley)
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3 examples of dicot
Marrow (cucurbita), Rose, Oak (Quercus)
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Whats a Pulvinus
Joint like thickening at each petiole (common in Mimosa)
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Other cards in this set

Card 2

Front

Bacteria in root nodules

Back

Rhizobium

Card 3

Front

How do the roots attract bacteria?

Back

Preview of the front of card 3

Card 4

Front

Enzyme in Rhiozbium that fixes nitrogen?

Back

Preview of the front of card 4

Card 5

Front

Quick explanation of how bacteria enter root

Back

Preview of the front of card 5
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