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Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the atmosphere, the...

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Foliar Iron Spray Potentiates Growth of Seedlings on Iron-free Media.

P M Neumann1, R Prinz

  • 1Soils and Fertilizers Laboratory, Faculty of Agricultural Engineering, Technion, Israel Institute of Technology, Haifa, Israel.

Plant Physiology
|June 1, 1975
PubMed
Summary
This summary is machine-generated.

Iron deficiency stunts bean seedling growth, causing chlorosis. A single foliar spray of iron sulfate (FeSO4) effectively restored growth, with added surfactants improving iron absorption and reducing plant damage.

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A Colorimetric Method for Measuring Iron Content in Plants
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Area of Science:

  • Plant physiology
  • Agricultural science
  • Nutrient management

Background:

  • Iron deficiency in plants leads to reduced growth and chlorosis.
  • Bean seedlings (Phaseolus vulgaris cv. Brittle Wax) exhibit severe symptoms when deprived of iron.

Purpose of the Study:

  • To investigate the effects of iron deficiency on bean seedling growth.
  • To evaluate the efficacy of prophylactic iron sulfate (FeSO4) foliar application.
  • To assess the role of surfactants in improving FeSO4 foliar uptake and mitigating phytotoxicity.

Main Methods:

  • Bean seedlings were grown in iron-free media to induce deficiency symptoms.
  • A single prophylactic spray of FeSO4 was applied to primary leaves.
  • Silicone-based surfactants were incorporated into FeSO4 spray solutions.
  • Iron chelate foliar sprays were also tested for comparison.

Main Results:

  • Iron deficiency significantly reduced root size, dye reduction capacity, and shoot growth, causing chlorosis.
  • A single FeSO4 foliar spray on 7-day-old seedlings promoted growth comparable to continuous root supply.
  • Surfactants reduced FeSO4 spray-induced leaf burn and enhanced iron adsorption.
  • Iron chelate foliar sprays were less effective than FeSO4.

Conclusions:

  • Prophylactic foliar application of FeSO4 can effectively correct iron deficiency in bean seedlings.
  • Surfactants enhance the efficacy and safety of FeSO4 foliar sprays.
  • FeSO4 foliar application presents a viable strategy for managing iron deficiency in crops.