Where is generative nucleus?
POLLEN GRAINS
one of two HAPLOID nuclei found within the POLLEN GRAINS of flowering plants, which enters the pollen tube when it is produced, divides by MITOSIS, and becomes the male gamete nucleus which fuses with the female egg cell at FERTILIZATION.
What is the function of generative nucleus of pollen grain?
Generative nucleus is one of the two haploid nuclei present in the pollen grains of the angiosperms. It’s function is to fertilize the egg.
What is the function of generative cell?
A cell of the male gametophyte (pollen grain) of seed plants that divides to give rise directly or indirectly to sperm.
What is the fate of generative nucleus?
While the pollen tube is growing towards the ovary of the plant, the generative nucleus divides into two sperm nuclei. Of these, one sperm nucleus enters the egg nucleus and fuses with it’s nucleus forming the ZYGOTE.
What does a Microspore develop into?
heterospory in plants each microspore develops into a microgametophyte (male gametophyte), which ultimately produces male gametes (sperm), and each megaspore produces a megagametophyte (female gametophyte), which ultimately produces female gametes (eggs).
What is the role of Synergids?
Synergid cells are two specialized cells that lie adjacent to the egg cell in the female gametophyte of angiosperms and play an essential role in pollen tube guidance and function. The synergids are also essential for the cessation of pollen tube growth and release of the sperm cells.
What happens to the generative nucleus during germination?
After the pollen grain germinates into a pollen tube, the generative nucleus divides into two sperm nuclei. Because the generative nucleus and sperm nuclei contain cytoplasmic sheaths, they are often referred to as cells in some textbooks.
What happens to the generative nucleus during the process?
Answer: Explanation: During the process of fertilization, when the pollen tube enters the embryo sac the tube nucleus disintegrate. The fate of tube nucleus is that it disintegrates and the generative nucleus forms the ZYGOTE and ENDOSPERM NUCLEUS.
What is the difference between tube nucleus and generative nucleus?
The key difference between generative nucleus and pollen tube nucleus is that generative nucleus is one of the two male nuclei of seed plants that fuses with the female nucleus in the embryo sac while pollen tube nucleus is the nucleus that guides pollen tube to grow along the pistil into the female embryo sac.
What happens with a generative cell?
The generative cell is formed at the first division of the microspore and divides in the pollen grain or pollen tube to form two sperm cells. In vivo, sperm release occurs spontaneously within the embryo sac, and free sperm cannot be collected for experimentation.
What happens to the generative nucleus after fertilization?
What happens to generative nucleus during the fertilization?
After the pollen grain germinates into a pollen tube, the generative nucleus divides into two sperm nuclei. Eventually it penetrates the micropyle of an ovule and releases its two sperm into the 8-nucleate embryo sac. During double fertilization, one sperm fuses with the egg nucleus to form a zygote.