Lesson Notes By Weeks and Term v4 - SHS 1

Lesson Video

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Performance objectives

• Describe what tissue culture is and its process.
• Explain its importance for cereals, legumes, and tuber crops.
• Identify the advantages and disadvantages of tissue culture.

Lesson summary

In Ghana, our farmers face many challenges like pests, diseases (like the cassava mosaic virus), and the effects of climate change, which can lead to low crop yields and food shortages. Traditional methods of planting, while important, sometimes cannot solve these problems quickly. This lesson introduces an exciting modern technology called Tissue Culture. It is a laboratory technique that allows us to grow thousands of healthy, identical plants from just a tiny piece of a single "mother" plant.

Lesson notes

A. What is Tissue Culture?

Tissue Culture (also known as micropropagation) is a scientific technique where very small pieces of a plant (like a piece of a leaf, stem, or root), called an explant, are grown in a laboratory under sterile conditions on a special nutrient-rich gel called a nutrient medium. From this tiny piece, a whole new plant, genetically identical to the parent plant, can be grown.

Think of it like this: If you cut a piece of a yam tuber to plant, you get one or a few new yam plants. With tissue culture, you can take a piece of a yam leaf smaller than your fingernail and, in a lab, turn it into thousands of tiny yam plantlets. B. The Scientific Principle: Totipotency

The magic behind tissue culture is a concept called totipotency. Definition: Totipotency is the ability of a single plant cell to divide and grow to form a whole, new, complete plant. Explanation: Almost every living cell in a plant contains all the genetic information (the "blueprint" or "instructions") needed to create the entire plant—roots, stem, leaves, and all. Tissue culture provides the perfect environment (food, light, temperature, and hormones) to "unlock" this potential. C. The Tissue Culture Process: Step-by-Step

Evaluation guide

• Describe the use and importance of tissue culture in arable crop (cereals, legumes,
• and tuber crops) enterprises .
• Problem -Based Learning: Learners in mixed -gender groups (of
• are tasked to research