Chapter 13

Plant Responses to Iron, Manganese, and Zinc Deficiency Stress

Theocharis Chatzistathis

Micronutrient constraints (especially those of Fe, Mn, and Zn) are among the most serious nutritional problems in calcareous and alkaline soils. Other adverse soil conditions limiting their availability are low cation exchange capacity (CEC), high organic matter content, soil humidity shortage, etc. From the non-soil factors restricting Fe, Mn, and Zn availability and uptake are: low root exudation release, low acidification ability of rhizosphere, low root system colonization by mycorrhiza, etc. Under adverse soil conditions described above, Fe, Mn, and Zn availability is limited; however, many plant species adopt various strategies, which enable ...

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