Boron deficiency
Boron (B)
B is solid metalloid with atomic number-5 and atomic weight-10.811. Plants absorb B in the form of BO33- B4O72-.
B is an immobile micronutrient in plants.
Function
In plants it is required in order to perform several functions
- Uptake and utilization of calcium.
- Translocation of carbohydrates.
- Cell differentiation and cell elongation.
- Pollen germination.
- Membrane functioning.
- Nucleic acid synthesis.
- Hormone function.
Deficiency symptoms
Depending upon
the species and age of the plants, symptoms of B deficiency may vary
considerably.
- Deficiency symptoms appear most on the young leaves and terminal buds.
- Base of young leaves blade become necrotic.
- Stems become stiff and brittle.
- Plants become highly branched due to loss of apical dominance.
- Because of inhibited cell division, shoot apices become necrotic.
- Fleshy parts of the plants, such as, roots, tubers and fruits show abnormalities due to breakdown of internal tissues.
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| Cracked mango fruits because of boron deficiency |
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