Sexual Reproduction in Plants Plants Biology FuseSchool

in this video we will be looking at sexual reproduction in plants did you know that they are an estimated 900 plant species known to science this diversity of plant species is in part due to sexual reproduction in plants sexual reproduction is carried out in the flowers the flowers contain the sexual organs let's start with labeling the different parts of flower the petals and the sepals help protect the flower bud and can be brightly coloured or scented to attract pollinators the stem and the receptacle are the parts that connect the flower to the rest of the plant the stamen is the male part of the flower it consists of an anther where pollen is produced and the filament which is the stalk that supports the anther these structures are responsible for the production and the positioning of pollen the male gamete the female part of the flower is called the carpal and this consists of three parts the stigma sticky landing for pollen the style where the pollen grain descends and the ovary where the female gametes or sextiles are located within the ovary ovules produce female gametes so how does pollination work pollination is transfer of pollen from the male anthem of one flower to the female stigma of another flowers can be pollinated in different ways by wind and water or by pollinators such as insects birds and other animals flowers pollinated by pollinators are structurally different from those pollinated by wind or water look at the differences in size scent and color of the petals and the positioning of the stamen and style here are some key differences why do you think they are different did you know that pollinators are very important to our food supply they pollinate plants that are responsible for bringing us one out of every three bites of food once plant has been pollinated fertilization can occur fertilization results in the production of seeds mature pollen grain containing two male 6 cells has landed on the female stigma of the same species the pollen grain grows pollen tube that goes down the female style to the ovary where it enters through an opening called the micropile the male stick cells travel from the pollen grain down to the pollen tube to the female ovule here one male 6 cell fuses with the female egg fertilizing it this develops into the seed the other mill six cell attaches to two cells in the embryo sac forming an endosperm this provides the starchy food for the seed to grow the ovary enlarges and becomes fruit surrounding the internal seeds the fruits and seeds are dispersed in many ways some even by humans where they will again grow into new plant under the correct conditions completing the long cycle of sexual reproduction in plants so there we have sexual reproduction plan pollination has to happen before fertilization the male pollen is produced in the anther where it is then dispersed during pollination the female parts of the flower are the stigma star and the ovary please like and share our videos with your friends if you have any questions that you want help with just comment below