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21 Cards in this Set
- Front
- Back
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Autotroph |
Obtain carbon from the atmosphere although photosynthesis |
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Soil solution |
Solutions of mineral nutrient ions that surrounds plant roots |
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Essential element |
A plant nutrient whose absence causes severe disruption |
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Macronutrient |
An element that has concentrations of at least one gram per kilogram |
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Micronutrients |
Elements with concentrations of less than .1g/kg |
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Hydroponics |
Growth of plants in nutrient rich solution |
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Topsoil |
Soil layer that supports plant mineral nutrient needs |
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Subsoil |
Accumulates material from topsoil and parent rock |
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Parent rock |
c horizon, where soil arises |
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Leached |
When nutrients are washed down into lower levels of soil by rainwater |
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Loam |
A soil with an optimal mix of sand, clay, and silt |
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Humus |
Broken down plant mass |
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Organic fertilizers |
Compost and manure, used to restore nitrogen to soil |
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Inorganic fertilizers |
Used to supply mineral nutrients directly |
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Strigolactones |
Chemical signal molecules that stimulate rapid fungal growth |
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Bacteroids |
Forms of bacteria that fix nitrogen in plants |
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Nitrogenase |
Enzyme that enables bacteria to fix nitrogen |
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Nitrogen fixation |
N2+6H->2NH3 |
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Leghemoglobin |
An O2 carrier used to create anaerobic environments for bacteria |
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Hemiparasites |
Photosynthesize but derive nutrients from and water from other living plants |
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Holoparasites |
Completely parasitic plants that do not perform photosynthesis |
