Question:

If one can induce parthenocarpy through the application of growth substances which fruits would you select to induce parthenocarpy and why?

Updated On: Mar 18, 2024
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Solution and Explanation

Parthenocarpy is the process of developing fruits without involving the process of fertilization or seed formation. Therefore the seedless varities of economically important fruits such as oranges, lemon, watermelon etc. are produced using this technique. This technique involves induces fruit formation by the application of plant growth hormones such as auxins.

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Concepts Used:

Post-Fertilization Events

There are series of events that happen in the development of plants after their fertilization process to form a fruit from a diploid zygote. The four different developmental steps that occurs during post fertilization are:

  • Development of an Endosperm: The endosperm, a tissue, present in the seed during the fertilization, precedes the development of an embryo. It is categorized into three types.
    • Nuclear Formation
    • Cellular Formation
    • Helobial Formation
  • Development of an Embryo: Embryogeny is the embryo development process and it starts developing at the micropylar end of the embryo sac in the zygote. The formation stages of embryogeny are almost the same in both the plants dicot and monocot, regardless of their structure.
    • Monocot Embryo
    • Dicot Embryo
  • Development of a Seed: A Seed has Three Body Parts:
    • Seed Coat
    • Cotyledon
    • Embryo Axis
  • Formation of a Fruit: After the cell division and separation in the ovary, it is changed into fruit because of stimuli received from fertilization just as developing seed. The pericarp which might be fleshy like guava, tomato, or cucumber or might be weathered and dry like pea, bean, or mustard. After all the events the two types of fruits are formed:
    • True Fruit
    • False Fruit