Vicky's father wants to grow a single plant having two desirable characters colourful flowers and big fruits what method will you support him and why?
Answers
Aim :
To observe the different stages of mitosis in onion root tip.
Apparatus :
- Slide
- microscope
- cover slip
- dilute HCl
- spirit lamp
- glass rod
- needle
- brush
- fresh onion roots
Procedure :
➜ Collect freshly grown onion root tips cut off the last 5mm of it and place them in a test tube.
➜ Add dil. HCl and heat it on spirit lamp for 5min. to soften the root tissue.
➜ Decant the liquid carefully, wash the root tip on a watch glass containing water to remove acid.
➜ Remove the excess water with help of filter paper.
➜ Place the tip on the slide and add one drop of methylene blue.
➜ Now gently tap the root with end of the glass rod until it is completely broken.
➜ Place a cover slip on tip and warm gently for a few seconds over very low flame.
➜ Take care that it must not boil.
➜ Put a piece of filter paper over the preparation and press the cover slip with your thumb avoiding any side way movements.
➜ Observe under microscope and draw what you have observed, in your notebook.
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I will suggest the method of either grafting or cross-pollination.
Grafting method:
•In this method, two plants are joined together in such a way that the two stems join and grow as a single plant.
•This technique is used to produce plants with desirable characteristics and is helpful for propagating improved varieties of various flowers and fruits.
•In this technique, the plant attached to the soil is called stock whereas the team attached to it is called Scion.
•Using this technique, we can attach the two plants with desirable characteristics of colourful flowers and big fruits together to get the single plant.
Cross-pollination method:
•In this method, 2 plants of the same species but different characteristics can be cross-pollinated.
•The pollen from one plant having the characteristic of colourful flower can be used to pollinate another plant that bears big fruits.
•The resulting zygote will have the characteristics of both the pants.
Explanation:
Grafting method: In this method, two plants are joined together in such a way that the two stems join and grow as a single plant. This technique is used to produce plants with desirable characteristics and is helpful for propagating improved varieties of various flowers and fruits.
Thank you