Photosynthesis and plant nutrition Flashcards
What is a source in a plant?
A source is any part of the plant that produces or releases sugars, usually through photosynthesis. The main source is the leaves, where sugars are made and then transported to other parts of the plant via the phloem. Other sources can include storage organs (e.g., tubers) during periods of growth when they release stored sugars.
How is the palisade mesophyll layer adapted for photosynthesis?
The palisade mesophyll layer is highly specialized to maximize photosynthesis:
- Packed with Chloroplasts – Contains many chloroplasts to absorb maximum light.
- Located Near the Upper Surface – Positioned just below the upper epidermis to receive the most sunlight.
- Tightly Packed Cells – Arranged closely to enhance light absorption and minimize light loss.
- Elongated Shape – Increases surface area for capturing more light.
- Thin Cell Walls – Allows efficient diffusion of carbon dioxide for photosynthesis.
What is a sink in a plant?
A sink is any part of the plant that uses or stores sugars for growth, energy, or storage. Common sinks include roots, developing fruits, seeds, and growing shoots. These areas receive sugars from the source via the phloem to support functions such as growth, energy storage, and reproduction.
