Study of pollen germination on slide.
Practical Notebook Biology Standard XII
Study of pollen germination on the slide.
Study of Palin Germination of Side and Chapter Class 12th Practical Exam, we will know how to download the answer, let's start doing the video from google, first of all, you have to come in google chrome and you have to search we think work to You have to do knowledge, after searching this side, the result will be in front of you in this way, I will also put the link on this site in the description box, then you have to click on the first link below.
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Biology
Chapter 4
Answers
Practical Notebook
Standard XII
Class-12th
science
Pollen grains are the male reproductive units produced in the anther lobe of the statement-producing pollen tubes carrying male gametes, on germination.
Aim: To study the process of pollen germination on the slide while observing under the compound microscope.
Requirements -
Flower of Catharanthus (periwinkle) Helianthus (Sunflower) or Hibiscus (shoe flower), cavity slide/glass slide, coverslips, compound microscope, sucrose crystals (Table sugar), etc. Principle: 4. Study of pollen germination on the slide.
Pollen grain after being deposited over the stigma absorbs water and nutrients from the stigma and germinates to produce male gametophytes showing a pollen tube with two non-motile male gametes and a larger vegetative nucleus .. Figure: observe some
Fig Procedure:
A nutrient medium is to be prepared using 20grams of sucrose in 100 ml of water.
Take a few drops of this solution preferably on a cavity slide and dust a few pollen grains from mature, dehisced anther.
Place the coverslip carefully.
Observe the slide under the compound microscope for minutes.
Observation
- In the nutrient medium, the pollen will germinate and the pollen tube comes out through the germ pore.
- It is due to the enlargement of tube cells and stretching of the intine, the pollen tube comes out and grows. Inferences: different stages are gametic pollens. pollens are in their initial Stage,
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