Which of these statements about transport in plant is incorrect ?

Options

A. The direction of movement in the phloem can be upwards or downwards , i.e. ., bi - directional.
B. Phloem sap is mainly water and sucrose but other sugars , hormones and amino acids are also transported or translocated through phloem.
C. Xylem transports only inorganic nutrients while phloem transports only organic materials
D. The chief sinks for the mineral elements are the growing regions of the plant , such as the apical and lateral meristems , young leaves , developing flowers , fruits and seeds , and the storage organs .

Answer

To determine which statement about transport in plants is incorrect, let's analyze each option step by step.

### Step 1: Analyze Option A
**Statement:** The direction of movement in phloem can be upwards or downwards, i.e., bidirectional.

**Evaluation:** This statement is correct. Phloem is responsible for transporting nutrients, particularly sugars, from the leaves (where they are produced) to other parts of the plant. This transport can occur in both directions, depending on the plant's needs.

### Step 2: Analyze Option B
**Statement:** Phloem sap is mainly water, sucrose, but other sugars, hormones, and amino acids are also transported and translocated through phloem.

**Evaluation:** This statement is also correct. Phloem sap primarily consists of water and sucrose, but it can also transport other sugars, hormones, and amino acids, which are essential for the growth and development of the plant.

### Step 3: Analyze Option C
**Statement:** Xylem transports only inorganic nutrients while phloem transports only organic material.

**Evaluation:** This statement is incorrect. While it is true that xylem primarily transports water and inorganic minerals, it is not accurate to say that it only transports inorganic nutrients. Xylem can also transport some organic compounds. Furthermore, phloem does transport organic materials, but it is not limited to them; it can also transport certain inorganic nutrients.

### Step 4: Analyze Option D
**Statement:** The chief sink for the material minerals elements are growing regions of plants such as apical and lateral meristem, young leaves, developing flowers, fruit, seeds, and storage organs.

**Evaluation:** This statement is correct. The growing regions of plants, including meristems and young leaves, are indeed the primary sinks for nutrients and minerals.

### Conclusion
After analyzing all the options, the incorrect statement is **Option C**: "Xylem transports only inorganic nutrients while phloem transports only organic material."

### Final Answer
The incorrect statement about transport in plants is **Option C**.

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