What is source and sink in plants? In which conditions they are reversed?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Source in Plants:**
- The source in plants refers to the part of the plant where food (specifically carbohydrates produced through photosynthesis) is produced. The primary source of food in plants is the leaves, where photosynthesis occurs.

2. **Definition of Sink in Plants:**
- The sink is the part of the plant that requires or stores the food produced. Sinks are typically areas where the food is utilized for growth, energy, or stored for later use. Common examples of sinks include roots, stems, and buds.

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