During the fertilization process, some plants utilize a pollen tube. In this lesson, we’ll explore how a pollen tube forms, how it functions and how it grows.
Do you have a favorite flower? Maybe it’s growing in your neighbor’s garden or near a hike you take in the forest? Plants that produce flowers are called angiosperms and differ from non-flowering plants, like pine trees or ferns. Part of how these flowering plants reproduce, making more of your favorite flowers next year, is by using a pollen tube.
Let’s review some flower anatomy first before we get into the pollen tube in detail.
Flower Reproductive Review
Although flower reproduction shares some similarity with that of animals, plants cannot move, so other animals must help them pollinate. A pollen grain is the plant version of a human sperm cell. Inside of the pollen grain, we find the male gametophyte, or the haploid or half chromosome version of a plant’s spore.
The gametophyte forms when the plant’s spores divide and contain half of the genetic material of the plant. When the gametophyte fertilizes an ovule, both contribute their half of genetic material, and the end result is a new plant.A flower has a few important parts we should go over. The eggs or ovules are housed in the ovaries, which are housed in a bulge at the bottom of a tube, shaped a bit like a vase. The tube is called the style and the top of the tube is called the stigma. All together, these parts are called a pistil.
|When The other potential start for the haploid