Plant Nutrients and Their Roles
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Questions and Answers

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)?

  • Wilting and chlorosis
  • Stunted growth
  • Poor growth
  • Yellow and brown leaf margins (correct)
  • 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?

    <p>Atmospheric air</p> Signup and view all the answers

    Which of the following elements has deficiency symptoms related to poor growth and wilting?

    <p>Hydrogen (H)</p> Signup and view all the answers

    Which element is primarily absorbed in the form of NO₃⁻ or NH₄⁺?

    <p>Nitrogen (N)</p> Signup and view all the answers

    What is a common deficiency symptom for Potassium (K)?

    <p>Yellow and brown leaf margins</p> Signup and view all the answers

    What is the primary source of Hydrogen (H) for plants?

    <p>Water (H₂O)</p> Signup and view all the answers

    Which function is NOT associated with Potassium (K) in plants?

    <p>Component of nucleic acids</p> Signup and view all the answers

    What deficiency symptom is commonly associated with Nitrogen (N)?

    <p>Strong chlorosis particularly of older leaves</p> Signup and view all the answers

    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_2OH2​O) from the soil solution. Oxygen is a component of organic molecules in plants.
    • Hydrogen (H) is taken up as water (H2OH_2OH2​O) 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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    Description

    Explore the essential nutrients required for healthy plant growth, including carbon, oxygen, hydrogen, nitrogen, and potassium. This quiz covers how plants absorb these elements and the impact of their deficiencies. Test your knowledge on the roles these nutrients play in plant development.

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