Question

Explain the factors on which pollengermination depends?​

Answer 1

Answer:

Temperatures between 23–30°C and a relative humidity about 60–65% are the best conditions for in vitro pollen germination and pollen tube elongation. In hybrid tea roses the mean percentage of pollen germination is positively correlated with the percentage of normal pollen.

Answer 2

Answer:

During germination, the tube cell elongates into a pollen tube. In the flower, the pollen tube then grows towards the ovule where it discharges the sperm produced in the pollen grain for fertilization. The germinated pollen grain with its two sperm cells is the mature male microgametophyte of these plants.

Explanation:

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