Any mineral ion concentration in tissues that reduces the dry weight of tissues by about 10% known as

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe a mineral ion concentration in plant tissues that leads to a reduction of about 10% in the dry weight of those tissues.

2. **Identifying the Cause of Reduction**: The reduction in dry weight is typically due to the loss or deficiency of essential micronutrients. These micronutrients are crucial for various physiological functions in plants.

3. **Linking Reduction to Mineral Ion Concentration**: When the concentration of certain mineral ions becomes too high or too low, it can lead to detrimental effects on plant health, including a significant reduction in dry weight.

4. **Defining the Term**: The specific term that describes a mineral ion concentration that negatively impacts plant tissues, causing a reduction in dry weight by about 10%, is known as "toxic concentration."

5. **Conclusion**: Therefore, the answer to the question is that any mineral ion concentration in tissues that reduces the dry weight of tissues by about 10% is known as "toxic concentration."

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