GRADE 9 Agriculture – GRAFTING IN PLANTS Quiz
1. Which of the following is not a common method of grafting plants?
Layering is a propagation technique where roots are induced on a stem while still attached to the parent plant. It is not a method of grafting.
2. What is the purpose of grafting in plants?
Grafting is often used to improve disease resistance in plants by combining a resistant rootstock with a desired scion.
3. Which part of the plant is referred to as the scion in grafting?
The scion is the upper part of the plant that is grafted onto the rootstock. It typically consists of a shoot with multiple buds.
4. What is the purpose of wrapping the graft union with a special tape or material?
Wrapping the graft union helps to prevent dehydration and provides a suitable environment for successful healing and growth of the grafted plant.
5. Which of the following is an example of herbaceous grafting?
Chip budding is a form of herbaceous grafting where a bud from the scion is inserted into the rootstock. It is commonly used for fruit trees.
6. What is the best time of the year to perform grafting on fruit trees in Kenya?
Grafting is best done during the rainy season when the plants are actively growing and there is enough moisture for successful healing and growth.
7. Which grafting technique involves joining two plants of the same species but different varieties?
Top working is a technique where the top part of an established tree is grafted with a different variety of the same species. It is commonly used for fruit trees.
8. What is the main advantage of using grafting as a propagation method?
One of the key benefits of grafting is the ability to improve disease resistance in plants by selecting a resistant rootstock.
9. Which grafting technique involves inserting a scion into a cleft created in the rootstock?
Cleft grafting involves making a cleft or slit in the rootstock and inserting a scion into the opening. It is commonly used for trees with larger diameters.
10. What is the main disadvantage of using grafting for plant propagation?
Grafting can be more expensive compared to other propagation methods due to the need for specialized tools, materials, and skilled labor.
11. Which grafting technique involves attaching a scion onto the stem of the rootstock plant?
Side grafting is a technique where a scion is attached to the side of the stem of the rootstock plant. It is commonly used for small diameter plants.
12. What does the term 'rootstock' refer to in grafting?
Rootstock is the plant onto which the scion is grafted. It provides the root system and influences factors like growth rate and disease resistance.
13. Which of the following is a disadvantage of using vegetative propagation methods like grafting?
Vegetative propagation methods like grafting result in genetically identical plants, limiting genetic diversity and potentially affecting plant resilience to changing environments.
14. In grafting, what does the term 'compatibility' refer to?
Compatibility in grafting refers to the ability of the scion and rootstock to unite successfully and form a functional vascular connection for nutrient transport.
15. What is the primary reason for using grafting to propagate plants?
Grafting is commonly used to propagate plants while maintaining specific desirable traits of the parent plant, such as fruit quality or disease resistance.
16. Which of the following is a factor to consider when selecting rootstock for grafting?
Selecting rootstock with disease resistance is crucial in grafting to ensure that the grafted plant has improved resilience against common pathogens.
17. What is the primary function of the rootstock in a grafted plant?
The rootstock in a grafted plant is responsible for providing the root system, anchorage, and nutrients to the scion, ensuring the overall survival and growth of the plant.
18. Which grafting technique involves cutting a V-shaped notch in the rootstock and scion for joining?
Whip and tongue grafting involves creating matching V-shaped cuts in both the scion and rootstock, allowing for maximum contact between the two for successful grafting.
19. What is the term used for the process of ensuring a successful union between the scion and rootstock in grafting?
Healing is the term used to describe the process of successful vascular connection and tissue regeneration between the scion and rootstock after grafting.
20. Which plant part would typically have the desired fruit characteristics in a grafted plant?
The scion is usually chosen for its desired fruit characteristics, as this part of the grafted plant will exhibit traits such as fruit size, flavor, or color.
21. What is the primary reason for wrapping the graft union after grafting?
Wrapping the graft union helps to create a barrier against pathogens and diseases, reducing the risk of infections that could impact the success of the graft.
22. Which grafting technique involves attaching a growing shoot of the scion to the rootstock before making a cut below it?
Inarching is a grafting technique where a growing shoot of the scion is attached to the rootstock before making a cut below it. This method allows for better nutrient flow and healing.
23. What is the primary reason for choosing a scion with multiple buds for grafting?
Selecting a scion with multiple buds increases the chances of graft success, as it provides more potential points of growth in case some buds fail to develop.
24. Which of the following environmental factors can negatively impact the success of grafting?
Low temperatures can slow down the healing process in grafting, affecting the successful union between the scion and rootstock. It is important to consider the temperature during grafting.
25. What is the ideal size of a scion for successful grafting?
Selecting a scion that is about twice the size of the rootstock diameter is ideal for successful grafting. This allows for proper nutrient flow and growth potential.