plants take zinc in form of :

Options

A. `ZnSO_(4)`
B. `Zn^(++)`
C. `ZnO`
D. `Zn`

Answer

**Step-by-Step Solution:**

1. **Understanding Zinc Absorption in Plants**:
- Plants absorb minerals from the soil, and zinc is one of the essential micronutrients required for various physiological functions.

2. **Forms of Zinc**:
- The question presents several forms of zinc: ZnSO4 (zinc sulfate), Zn2+ (zinc ion), ZnO (zinc oxide), and elemental zinc (Zinc).

3. **Identifying the Available Form**:
- Among these forms, the most bioavailable form for plants is the divalent ion, Zn2+. This is the form that plants can readily absorb through their root systems.

4. **Soil pH and Zinc Availability**:
- The availability of zinc decreases when the soil pH shifts towards the alkaline side. In alkaline conditions, zinc can form insoluble compounds such as zinc phosphate, which plants cannot absorb.

5. **Role of Zinc in Plants**:
- Zinc plays a critical role in the synthesis of tryptophan, an amino acid that is a precursor to indole acetic acid (IAA), a plant hormone involved in growth regulation.

6. **Deficiency Symptoms**:
- A deficiency of zinc in plants typically leads to chlorosis, particularly in older leaves, causing them to turn yellow.

7. **Conclusion**:
- Based on the above information, the correct answer to the question "plants take zinc in form of" is Zn2+ (option B).

**Final Answer**: Plants take zinc in the form of Zn2+.

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