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Phytic acid in green leaves.

H Hadi Alkarawi1, G Zotz

  • 1Functional Ecology Group, Institute of Biology and Environmental Sciences, University of Oldenburg, Oldenburg, Germany; Foundation of Technical Education, Al-Musaib Technical College, Babylon, Iraq.

Plant Biology (Stuttgart, Germany)
|December 18, 2013
PubMed
Summary
This summary is machine-generated.

Phytic acid, a phosphorus storage compound, is found in plant leaves. Its concentration in leaves, while variable, offers insights into plant phosphorus metabolism and warrants further investigation.

Keywords:
Luxury consumptionmyo-inositolhexakiphosphatenutrientsphosphorusphytatestoragevascular epiphytes

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Area of Science:

  • Plant biochemistry
  • Plant physiology
  • Nutrient cycling

Background:

  • Phytic acid (myo-inositolhexakiphosphate) is the primary phosphorus storage form in seeds and fruits.
  • Its occurrence in plant leaves has not been comprehensively reviewed.
  • Understanding foliar phytic acid is crucial for plant nutrient management.

Purpose of the Study:

  • To compile and critically review available data on phytic acid content in plant leaves.
  • To establish a reliable average foliar phytic acid concentration.
  • To investigate the relationship between foliar phytic acid and total phosphorus.

Main Methods:

  • Systematic literature search for studies reporting leaf phytic acid content.
  • Quantitative analysis of data from 45 published studies.
  • Exclusion of potentially erroneous high phytic acid values.
  • Statistical analysis of phytic acid-P and total P ratios.

Main Results:

  • Phytic acid is frequently detected in plant leaves, sometimes comprising a significant portion of total phosphorus.
  • Extreme reported values (up to 98% of total P) were deemed unreliable due to probable measurement errors.
  • Excluding high values, foliar phytic acid averaged 2.3 mg·g⁻¹ and represented 7.6% of total phosphorus.
  • No positive correlation was found between phytic acid-P and total P; a negative correlation was observed in Manihot esculenta.

Conclusions:

  • Foliar phytic acid is a common component of plant phosphorus, though typically not as dominant as in storage organs.
  • A revised average concentration provides a more accurate baseline for foliar phytic acid.
  • The unexpected negative correlation between phytic acid and total phosphorus in some species highlights the complexity of plant phosphorus metabolism and requires further research.