Student Blog Post Assignment #7

Flowering plants reproduce differently than animals. They reproduce through pollination, which involves the transfer of male gametes and female ovules. After pollination, the ovules grow to seeds within a fruit.

This is a picture of our brassica. Below are some close up pictures of some of the different parts of the plant.

This picture shows the anther with a stigma on it. The anther is basically the male reproductive system of a plant and it holds pollen/sperm cells and the stigma is the female reproductive system. Pollen is spread by bees that touch the pollen.

This is a picture of the stigma. On the plant, the stigma is where the germination of pollen grains occurs. Along with the style, and ovary, the stigma is also part of another one of the flower's structures called the pistil.

This is the ovule.  Each ovule is attached to a stalk that holds it. A small opening in the integuments (outer protective layer) at the apex of the ovule allows the pollen tube to enter and inject its sperm nuclei into the embryo sac (a large ovular cell in which fertilization and development occur).

This is a closer view of the pollen grain

Blog Post #7

Here is a picture of the brassica we used. Below are close up pictures of different parts of the plant.

This is a picture of the anther with a stigma on it. The anther is the male reproductive system and it holds pollen/sperm cells and the stigma is the female reproductive system. The anther helps pollinate by rubbing its pollen on bees that have landed on the plant.

This part of the flower is called the stigma. On the plant, the stigma is the site where germination of pollen grains occur. Along with the style and ovary, the stigma is also part of another one of the flower's structures called the pistil.

This part is the ovule.  Each ovule is attached by its base to the stalk that holds it. A small opening in the integuments at the apex of the ovule allows the pollen tube to enter and discharge its sperm nuclei into the embryo sac, a large ovular cell in which fertilization and development can occur.

This picture shows the pollen grains close up.

Blog post #7 Seth Nolan

This a picture of a brassica flower. the pictures underneath show the function of the flower under magnification.

This is a picture of an anther with stigma on it. the anther is the male reproductive system it holds pollen/sperm cells and the  stigma is the female reproductive system. The anther help pollinate by rubbing is pollen on passing bees.

This part of the flower is called the stigma. On a plant, the stigma is the site where the germination of the pollen grains occur.Along with the style and ovary, the stigma is part of the flower's structure called the pistil.

This is the ovule.  Each ovule is attached by its base to the stalk  that bears it. plant structure that develops into a seed when fertilized.  A small opening  in the integuments at the apex of the ovule permits the pollen tube to enter and discharge its sperm nuclei into the embryo sac, a large oval cell in which fertilization and development occur.

this is a closs up of the pollen in our flower

Blog post #7- Marco Dal Canto

     Here is my brassica plant flower.  All of the photos below will be of this flower and its certain parts under magnification. It will show its majors functions.

      This is an image that shows the anthers that has stigma on it. The stigmas part of the female reproductive system and the anthers is part of the male reproductive system. The other side of the anthers contain pollen, which contain sperm cells. The anthers rub the pollen off on a bee or other animals that pollinate, so then the pollen can be spread.

    This is the stigma of the flower. The stigma is attached to a circle shape thing called the style that is part of the ovaries. These parts make the part of the plant called the pistil. Its main purpose is to try to get pollen from other flowers off of pollinators, wind, and water.

This is the ovule. The ovule is inside the ovary of the plant so to get this photo we had to cut it open with a tool Mr. Bursch gave us. The ovule contains egg cells, the female gamete. These little eggs will get fertilized once sperm reaches them. These cells come together when they are fertilized and become zygote. This zygote will keep dividing until it becomes a seed with the ovary over it again.  This will become another plant.

Here is a photo of the pollen. We didn't take a flower that had not bloomed yet because there would not be any pollen.

Blog Post #7 Kylee Bourbon

The fertilization in our plants occur after pollination, when pollen grains land on the sigma of a flower from the same species. One of these pollen grains develops a tiny tube that goes down the style of the ovary. This tube has a male gamete that meets the female gamete in the ovule. The fertilization of the plants occur when the male and female gametes meet and their chromosomes come together. This results in normal sets of chromosomes, with some from either parent. The newly fertilized seed will later grow into a plant. This is how plants like brassica oleracea are fertilized in order to continue to reproduce.

This is a picture of the plant we dissected. We chose a plant that had already bloomed and was big enough for us to look at.

Here, you can see the stamen surrounding the carpel. This is easily seen when the petals of the flower are removed .  The  long tube is called a filament and the end is the anther. The anther is what produces pollen, which is the male gamete.

This is the carpel. The long tube is called the  style and the end part is called the stigma. The stigma has a sticky end and is used to attract pollen.

This is the ovary of the plant sliced in half. Inside, there are very tiny unfertilized ovules.  As you can see, no carpels or stamen can be seen.



BONUS:

This is the pollen from one of the flowers under a compound-light microscope.  We chose a flower that had already fully bloomed in order to get as much pollen as possible. https://docs.google.com/document/d/10QbFcPET2PNk-5vorWPzmy5fGf8T1wcS-PLFzRhEpcQ/edit