Morphology and contents of mature pollen grains. - Mature pollen grain
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Transmission electron microscopy was conducted to characterize the mature pollen grains in the massulae of Habenaria sagittifera at anthesis to understand its. Pollen is a fine to coarse powdery substance comprising pollen grains which are male Except in the case of some submerged aquatic plants, the mature pollen grain has a double wall. The vegetative and generative cells are surrounded by.