Presentation on theme: "Plant Reproduction and Breeding. What is selective breeding? Choosing specific plants with particular characteristics and encouraging those plants to."— Presentation transcript:
Plant Reproduction and Breeding
What is selective breeding? Choosing specific plants with particular characteristics and encouraging those plants to reproduce
Plants are also bred to withstand environmental conditions such as: Hardiness Yield Resistance to disease How well it stores Heather, Calluna vulgaris, one of Britain's hardiest plantsCalluna vulgaris
Genes Genetic material in a plant
Genetically Modified Plants Scientists combine genetic material from two different plants, so it has genes from both.
Plant Reproduction Asexual reproduction happens when a parent plant grows new plants from its foots, stems, or leaves.
Vegetative Reproduction When young plants are identical to the parents- usually happens when a new plant grows from the root of another. Can also occur through stems
Grafting To take a branch from one tree and attach it to another wU3E
Seed Plant Reproduction Female ConeMale Cone -Contains ovules -Catches pollen grains, and once the pollen tube grows down to the ovule, pollination occurs -Smaller -Pollen grains develop on it ams/science/plants/flowers.htm
1. Parts of a Flower
2. Pollination Occurs when pollen has been transferred from the anther to the stigma. When the pollen grain germinates on the stigma it creates a burrow called the pollen tube as it travels toward the ovary e.com/watch?v=w DM8OtS5MPM e.com/watch?v=w DM8OtS5MPM
3. When the pollen grain reaches the ovule, fertilization occurs
4. Pollination must take place before fertilization can take place
5. The fertilized embryo will become a tiny new plant inside the seed
Pollination Two types of pollination are self- pollination and cross- pollination
2 ways of cross-pollination 1. Wind 2. Animals
Artificial Pollination When plant breeders breed plants for specific purposes
Once a plant has been pollinated, a seed is formed! Inside the seed is a tiny plant that is called an embryo. It is protected by a seed coat that helps it stay alive or dormant.
What conditions does a seed need to be able to grow? Sunlight Water Air
When you bite into a pear you are eating a fruit! What is the function of fruit for a plant? A fruit is the growing ovary of the plant that swells and protects the developing seeds of a plant until they are ripe.
Name 5 ways that seeds are spread 1. Wind 2. Water (ex. Coconut) 3. Eaten by animals 4. Hitch a ride on animals 5. Fire
Farmers use machines to spread seeds like wheat, canola, barley.
Germination The development of a seed into a new plant. ams/science/plants/flowers.htm