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Plant ion deficiency: causes and symptoms

Infection and response • Plant disease (biology only)

Key concepts

What you'll likely be quizzed about

  • Mineral ions are dissolved charged atoms or molecules absorbed by plants from the soil.
  • Key examples include nitrate (NO3−) and magnesium (Mg2+).
  • Nitrate is essential for amino acids and protein production, while magnesium forms the core of chlorophyll molecules, which capture light for photosynthesis.
  • Mineral ions are primarily absorbed at root hair cells through active transport, which moves ions against a concentration gradient, ensuring plants retain necessary nutrients.

Flashcards

Test your knowledge with interactive flashcards

Which other symptoms signal nutrient problems apart from stunting and chlorosis?

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Additional signs include spots, malformed leaves or stems, and areas of decay, indicating potential pathogens or abiotic stresses.

Key notes

Important points to keep in mind

Nitrate shortage causes stunted growth by limiting protein synthesis and cell division.

Magnesium shortage causes chlorosis by reducing chlorophyll and lowering photosynthesis.

Root hair cells perform active transport to absorb ions from dilute soils; active transport requires energy from respiration.

Older leaves often exhibit deficiency symptoms first as plants favor younger tissues.

Soil tests and controlled nutrient trials reliably identify specific ion deficiencies.

Corrective fertilizers are effective only if roots and soil conditions allow for nutrient uptake.

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