How Do Organisms Reproduce?

Sexual Reproduction in Flowering Plants

Sexual reproduction is the type of reproduction that involves two different parents that belong to the opposite sex. This type of reproduction is seen in both plants and animals. In plants, sexual reproduction occurs in flowering plants. Before we learn more about sexual reproduction in flowering plants, we must understand the anatomy of a flower.

Suggested Videos

Play
Play
Play
Play
Play
previous arrow
next arrow
previous arrownext arrow
Slider

 

Flower

A flower is the sexual reproductive organ in plants. Flowers are often the most attractive structures of a plant. The flower’s anatomy can be divided into following layers:

  • Calyx
  • Corolla
  • Androecium
  • Gynoecium
Sexual Reproduction in Flowering Plants

Image Source: leavingcertbiology

Calyx

These are green petal-like structures that are found right above the base of the flower called the receptacle. The calyx is formed of sepals. Their main function is to protect the flower while it is still in the bud stage.

Browse more Topics under How Do Organisms Reproduce

Corolla

Corolla is the collective name given to the petals which are colourful parts of the flower. The petals of different flowers are found in different colours and in addition, most of the times they are fragrant as well. It is the petals that attract the pollinating agents to the flower. The corolla is located above the calyx layer.

Androecium

The androecium is the male reproductive part of a flower. It is considered the third whorl in a flower. The androecium is the name given to a group of stamens. Each stamen is made up of a filament and anther at the top of it. The anthers are lobed structures that produce pollen which contains the male gamete.

Sexual Reproduction in Flowering Plants

Image Source: brainly

Gynoecium

The gynoecium is the female reproductive organ in a flower. It is composed of the stigma, style, and ovary. The style is a slender filament on top of which lies the stigma which functions to hold transferred pollen grains. Once the pollen lands on the stigma, it is passed downwards through the style to the ovary. The ovary is lobed and consists of ovules which contain the female gamete.

Sexual Reproduction in Flowering Plants

Image Source: hourlybook

Pollination and Fertilization

The pollen grains and ovules by themselves cannot travel from one place to another. There are other factors such as wind, water, or animals that enable the pollen grains to travel to reach the stigma of the same or another flower. The process by which pollen grains are transferred from the anthers of one flower to the stigma of the same or another flower is known as pollination. Learn more about the Concept of Pollination in more detail here.

Sexual Reproduction in Flowering Plants

Image Source: moziru

Once the pollen grain carrying the male gamete reaches the stigma of the same or different flower, it is transported downwards via a pollen tube that arises from the pollen grain to reach the ovary. The ovary is present at the base of the flower and is lobed. These lobes contain the ovules carrying the female gamete.

The male gamete from the pollen now fuses with the female gamete in the ovule to form a zygote. This zygote undergoes cell division to form an embryo. Once the embryo starts developing, the ovary develops into the fruit, the other structures like the calyx and corolla fall off. The embryo becomes the seed which has the potential to give rise to a new plant.

Learn more about the Morphology of Flower here.

Solved Example for You

Question: Which of the following carries the male gamete for sexual reproduction in flowering plants?

  1. Ovary        
  2. Ovules
  3. Stigma        
  4. Pollen grain

Solution: Option D. Pollen grains carry the male gamete for sexual reproduction in flowering plants which fuses with the ovules to form the zygote.

Share with friends

Customize your course in 30 seconds

Which class are you in?
5th
6th
7th
8th
9th
10th
11th
12th
Get ready for all-new Live Classes!
Now learn Live with India's best teachers. Join courses with the best schedule and enjoy fun and interactive classes.
tutor
tutor
Ashhar Firdausi
IIT Roorkee
Biology
tutor
tutor
Dr. Nazma Shaik
VTU
Chemistry
tutor
tutor
Gaurav Tiwari
APJAKTU
Physics
Get Started

Leave a Reply

avatar
  Subscribe  
Notify of

Download the App

Watch lectures, practise questions and take tests on the go.

Customize your course in 30 seconds

Which class are you in?
No thanks.