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प्रश्न
List out the functions of the tapetum.
उत्तर
- It supplies nutrition to the developing microspores.
- It contributes sporopollenin through ubisch bodies thus plays an important role in pollen wall formation.
- The pollenkitt material is contributed by tapetal cells and is later transferred to the pollen surface.
- Exine proteins responsible for the ‘rejection reaction’ of the stigma are present in the cavities of the exine. These proteins are derived from tapetal cells.
संबंधित प्रश्न
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Arrange the layers of another wall from locus to periphery
Differentiate Secretary and invasive tapetum.
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______ refers to the flower in which gynoecium possesses many free carpels.
In a mature ovule, shows the presence of an oval shaped, haploid structure at micropylar end known as ______.
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The thick, highly resistant outer layer of pollen wall.
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Match the Column I (Type of pollination) and Column II (Characteristics). Select the correct option.
| Column I | Column II | ||
| a. | Ornithophily | 1. | Nocturnal flower |
| b. | Entomoohily | 2. | Light pollens |
| c. | Chiropterophily | 3. | Funnel-shaped corolla |
| d. | Anemophily | 4. | Pleasant fragrance and nectar |
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Name the part of pistil that develops into fruits and seeds after fertilization.
