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NCERT-Emasculated flowers have to be covered with a bag of suitable size, generally made up of butter paper, to prevent contamination of its stigma with unwanted pollen

NCERT-Emasculated flowers have to be covered with a bag of suitable size, generally made up of butter paper, to prevent contamination of its stigma with unwanted pollen

/ NCERT LINE BY LINE, pre-class / By Prof. Siddharth Sanghvi

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Emasculated Flowers and Butter Paper

Emasculated Flowers and Butter Paper

Using butter paper to cover emasculated flowers serves a specific purpose in plant breeding and hybridization processes. Butter paper, also known as wax paper, is a semi-transparent paper that has been coated with a thin layer of wax. Here’s why it’s commonly used:

  1. Non-stick surface: Butter paper has a smooth, non-stick surface due to its wax coating. This property helps prevent the adhesion of pollen grains to the surface of the bag, reducing the risk of contamination.
  2. Breathable material: Butter paper allows air to pass through while still providing a barrier against pollen. This breathability is essential for maintaining the health of the flower and preventing mold or bacterial growth inside the bag.
  3. Transparency: The semi-transparency of butter paper allows sufficient light to penetrate, supporting the process of photosynthesis in the covered flower.
  4. Ease of manipulation: Butter paper is relatively easy to manipulate and shape around the emasculated flower, ensuring a snug fit without damaging delicate floral structures.
  5. Availability and affordability: Butter paper is readily available in most markets and is relatively inexpensive compared to other materials with similar properties, making it a practical choice for covering emasculated flowers in large-scale breeding programs.

Overall, butter paper provides an ideal combination of properties necessary for covering emasculated flowers during controlled pollination, facilitating successful hybridization and preventing unwanted contamination.

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