Protoplasmic streaming theory of translocation of organic solutes was first proposed by

Options

A. Van der Honert
B. Cany and Thaine
C. De Vries
D. Curtis.

Answer

To answer the question regarding who first proposed the protoplasmic streaming theory of translocation of organic solutes, we can follow these steps:

### Step 1: Understand the Question
The question asks about the origin of the protoplasmic streaming theory, specifically who first proposed it. This theory relates to how organic solutes are transported within plants.

**Hint:** Focus on the key terms in the question: "protoplasmic streaming theory" and "translocation of organic solutes."

### Step 2: Identify the Scientists Listed
The options provided in the question include:
1. Van der Horne
2. Canny and Thane
3. Hugo de Vries
4. (Another option not mentioned in the transcript)

**Hint:** Review the names of the scientists carefully and recall any relevant contributions they made to plant biology.

### Step 3: Recall Relevant Information
From the video transcript, it is stated that Hugo de Vries was the first to propose the protoplasmic streaming theory. He was a Dutch botanist known for his work on plant physiology and the movement of organic substances in plants.

**Hint:** Think about the contributions of each scientist to the field of botany and plant physiology.

### Step 4: Confirm the Correct Answer
Based on the information provided, the correct answer to the question is Hugo de Vries. The other options are incorrect as they did not propose this theory.

**Hint:** Verify the answer by recalling any historical context or literature regarding the contributions of Hugo de Vries.

### Final Answer
The protoplasmic streaming theory of translocation of organic solutes was first proposed by **Hugo de Vries**.