The stigma is sticky in order to trap and hold the pollen grains on its surface easier. Pollen grains are fundamental in fertilization because they contain male gametes that fertilize the egg cell in the ovule.
- The pistil is the female reproductive part of a flower.
- The female pistil is made of a stigma, style and ovary.
- The stigma is a specialized region of the pistil which is modified for the reception of the pollen grains.
- A pollen grain is a male gametophyte (i.e., a gamete-forming plant), which consists of a single cell containing two male gametes.
- The pollen grain is formed in the anthers of the stamens, while the female gametophyte, also known as embryo sac or megagametophyte, is found in the ovule within the pistil.
- Pollen grains act to transfer the male gametes from the anther, i.e., the male reproductive organ of a flowering plant, to the stigma.
In conclusion, the stigma is sticky in order to trap and hold the pollen grains on its surface easier. Pollen grains are fundamental in fertilization because they contain male gametes that fertilize the egg cell in the ovule.
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