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Questions and Answers
What is the function of Nitrogen (N) in plants?
What is the function of Nitrogen (N) in plants?
- Regulation of water loss
- Storage of starch and sugars
- Major component of photosynthetic pigments
- Component of amino acids and proteins (correct)
Which deficiency symptom is associated with Potassium (K)?
Which deficiency symptom is associated with Potassium (K)?
- Wilting and chlorosis
- Stunted growth
- Poor growth
- Yellow and brown leaf margins (correct)
Where does hydrogen (H) primarily come from for plant intake?
Where does hydrogen (H) primarily come from for plant intake?
- Atmospheric air
- Organic matter decomposition
- Soil solution (correct)
- Nutrient-rich fertilizers
What is a major source of Carbon (C) for plants?
What is a major source of Carbon (C) for plants?
Which of the following elements has deficiency symptoms related to poor growth and wilting?
Which of the following elements has deficiency symptoms related to poor growth and wilting?
Which element is primarily absorbed in the form of NO₃⁻ or NH₄⁺?
Which element is primarily absorbed in the form of NO₃⁻ or NH₄⁺?
What is a common deficiency symptom for Potassium (K)?
What is a common deficiency symptom for Potassium (K)?
What is the primary source of Hydrogen (H) for plants?
What is the primary source of Hydrogen (H) for plants?
Which function is NOT associated with Potassium (K) in plants?
Which function is NOT associated with Potassium (K) in plants?
What deficiency symptom is commonly associated with Nitrogen (N)?
What deficiency symptom is commonly associated with Nitrogen (N)?
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Study Notes
Plant Nutrients
- Plants require various elements for healthy growth and development.
- These elements are taken up by the plant in different forms, from different sources, and play specific roles within the plant.
- Carbon (C), Oxygen (O), Hydrogen (H) are three of the most abundant elements in plants, and are obtained primarily from atmospheric air and soil solutions.
- These three elements are the building blocks of organic molecules that are essential for plant growth.
- Nitrogen (N) is absorbed by plants as nitrate (NO₃⁻) or ammonium (NH₄⁺) ions from soil solutions.
- Nitrogen is a key component of amino acids, proteins, nucleic acids, chlorophyll, coenzymes, and enzymes.
- Nitrogen deficiency leads to stunted growth and yellowing of older leaves.
- Potassium (K) is absorbed by plants as potassium ions (K⁺) from soil solutions.
- Potassium plays a role in regulating stomatal opening, and acts as a cofactor for many enzymes.
- Potassium deficiency results in yellowing and brown leaf margins, weak stems, and poorly developed roots.
Essential Elements for Plant Growth
- Carbon (C) is absorbed as carbon dioxide (CO2CO_2CO2) from the air. It is a key component of organic molecules within plants.
- Oxygen (O) is absorbed in two forms: as carbon dioxide (CO2CO_2CO2) from the air and as water (H2OH_2OH2O) from the soil solution. Oxygen is a component of organic molecules in plants.
- Hydrogen (H) is taken up as water (H2OH_2OH2O) from the soil solution. Hydrogen is a component of organic molecules in plants.
- Nitrogen (N) is taken up as nitrate (NO3−NO_3^-NO3−) or ammonium (NH4+NH_4^+NH4+) ions from the soil solution. Nitrogen (N) is crucial for producing amino acids, proteins, nucleotides, nucleic acids, chlorophyll, coenzymes, and enzymes. Deficiency in nitrogen leads to stunted growth and chlorosis (yellowing), particularly in older leaves.
- **Potassium (K) ** is absorbed as potassium ion (K+K^+K+) from the soil solution. Potassium is vital for stomatal operation and acts as a cofactor for numerous enzymes. Lack of potassium results in yellowing and browning of leaf margins, weak stems, and poorly developed roots.
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