Question

path taken up by pollen tube explain

Answer 1

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.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.

Answer 2

A pollen tube is a tubular structure produced by the male gametophyte of seed plantswhen it germinates. It acts as a conduit to transport the male gamete cells from the pollen grain—either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms. In maize, this single cell can grow longer than 12 inches (30 cm) to traverse the length of the pistil.

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