Question Video: Understanding the Circumstances in Which Grafting Is Effective | Nagwa Question Video: Understanding the Circumstances in Which Grafting Is Effective | Nagwa

Question Video: Understanding the Circumstances in Which Grafting Is Effective

Plants can also be reproduced asexually by a process called grafting. The diagram gives a basic outline of this process. In which of the following scenarios is grafting effective? [A] When the two plants are closely related [B] When the two plants are distantly related [C] When the two plants do not produce flowers

02:11

Video Transcript

Plants can also be reproduced asexually by a process called grafting. The diagram gives a basic outline of this process. In which of the following scenarios is grafting effective? (A) When the two plants are closely related. (B) When the two plants are distantly related. Or (C) when the two plants do not produce flowers.

Grafting, as illustrated in the diagram, is the process of attaching the tissue of two different plants together. Generally, the shoot, or scion, of one plant is cut off. And then it is attached to the rootstock of another plant. If the grafting is successful, the shoot can then continue to grow, while receiving nutrition and support from the rootstock. Grafting is commonly used to quickly replicate a desirable plant, faster and more reliably than may be possible through natural reproduction.

Fruit and nut trees are very commonly grafted with the shoot of a plant already known to produce well. This way, farmers can be more sure of the quality of the crop that will be produced. Fruit and nut trees produce flowers, which are fertilized before developing into the fruits or nuts which are harvested. So, grafting is used very commonly in flowering plants and works well. Therefore, we can eliminate (C).

In order for a graft to be successful, the shoot must be accepted by the rootstock so that the tissues of the two plants heal together, essentially creating one plant. In order for this to happen, the genetic profile of the tissues must be as similar as possible so that the vascular tissues of the two plants will in fact heal together and the shoot or scion will be accepted by the rootstock. The more genetically similar the two plants are, the more likely that the graft will be successful.

So, the correct answer to this question is (A). Grafting is effective when the two plants are closely related.

Join Nagwa Classes

Attend live sessions on Nagwa Classes to boost your learning with guidance and advice from an expert teacher!

  • Interactive Sessions
  • Chat & Messaging
  • Realistic Exam Questions

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy