Growth of pollen tube towards embryo sac is known as
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Growth of pollen tube towards embryo sac is known as Chemotaxis
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The growth of the pollen tube, accompanying the two pollen nucleus is an example of chemotropic movement.
Explanation:
Chemotropic movement is defined as the movement of some living substance towards or away from a particular chemical. Here in case of a pollen grain, the pollen nuclei, also called male nuclei grow towards the micropyle of the ovule.
The cells present in the micropyle have two synergids, which secrete calcium, boron and auxin hormone. The pollen tube searches for these and grows towards this only.
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