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The growth of the pollen tube is directed by ______(a) obturator(b) meristem(c) parenchyma(d) schlerenchymaI had been asked this question at a job interview.Origin of the question is Flowering Plants Reproduction in division Sexual Reproduction in Flowering Plants of Biology – Class 12

Answer»

Correct choice is (a) obturator

To ELABORATE: In the ovary the growth of the pollen tube is DIRECTED by ANOTHER TISSUE called obturator. The pollen tube enters the ovule, either through its micropyle (porogamy e.g., Lily), chalaza (chalazogamy e.g., Betula, Casuarina, Juglans regia) or the sides after piercing through the integuments (mesogamy, e.g. Cucurbita, Populus, Pistacea).


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