By which method ions are absorbed by the plants in the initial phase?

Options

A. Diffusion
B. DPD gradient
C. Ion channels
D. Water potential

Answer

**Step-by-Step Solution:**

1. **Understanding Ion Absorption in Plants:**
- Plants absorb ions from the soil, which is essential for their growth and development. This process occurs in two main phases: the initial rapid uptake and the slower uptake phase.

2. **Initial Phase of Ion Absorption:**
- In the initial phase, the absorption of ions is rapid. This phase is characterized by the quick uptake of ions into the plant's free space, specifically into the apoplast (the space outside the plasma membrane).

3. **Mechanism of Ion Uptake:**
- The uptake of ions during this initial phase is passive, meaning it does not require energy. Instead, it occurs along the concentration gradient, where ions move from an area of higher concentration in the soil to an area of lower concentration inside the plant.

4. **Role of Ion Channels:**
- The passive movement of ions into the apoplast is facilitated by ion channels. These channels allow specific ions to flow into the plant cells quickly and efficiently.

5. **Conclusion:**
- Therefore, the method by which ions are absorbed by plants in the initial phase is through **ion channels**.

**Final Answer:**
- The correct method of ion absorption by plants in the initial phase is through **ion channels**.

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