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Pollination
Nona Bogan
Wiki User
∙ 10y agoWhen the stigma is receptive, it is ready to receive compatible pollen grains.
Wiki User
∙ 8y agoWhen pollen moves to the stigma, it is pollination.
Wiki User
∙ 11y agoIt is called pollination
Wiki User
∙ 12y agopollination
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How does pollen grain reaches the ovary?
When pollen grains land on the stigma(funny stick thingo on a flower), it wil start to grow a pollen tube, towards the ovary and the ovules. Then it GOES THROUGH the tube and =============*FERTILISATION*=====================
After pollination the pollen grains begin to?
Pollen grains and on stigma of a compatible plant; the pollen grains germinate and grow down the style and into the ovary. Once in the ovary a sperm nucleus from the pollen grain fuses with the ovule (and forms into a zygote or embryo). The pollen tube then degenrates and the ovule forms into a seed.
The purpose of a pollen grain on a flower?
The purpose of pollen is to transfer the male reproductive cells (sperm) to the female reproductive cells (ovules) and thus to allow sexual reproduction. Pollen can be so transferred by many methods - wind, gravity, insects, etc. The pollen receptive part of the flower (the stigma) is often sticky, or textured so the pollen will stick. Once attached the pollen grain grows a tube into the stigma and down the style into the ovule. This tube allows the male gametes to fertilise the ovule, creating a seed.
How do you xxplain the structure of the pollen grain describe the development of pollen grain and male gamete?
While still attached to the anther, the nucleus of the pollen grain divides, producing two nuclei, one of which becomes the tube nucleus, the other is called the generative nucleus. The generative nucleus divides again, forming two sperm cells. Once the pollen grain is released from the anther, it is transported (by wind or fauna) to the stigma of the female flower. Once a pollen grain has landed on the stigma, it begins to grow a pollen tube (there are three nuclei in the pollen tube, one from the tube nucleus, and the two sperm). When the pollen tube reaches the ovary, both sperm cells enter the ovule, one fuses with the egg nucleus, the other fuses with polar nuclei that is also inside the ovule, forming the endosperm.
What is the process in which pollen from one plant is used to fertilize another?
cross fertilization
What part of the flower cathes the pollen garains dropped by the insects?
The pistil/stigma (top of the pistil), which is the female organ. Once fertilized, a seed or fruit will start developing.
How does pollen grain reaches the ovary?
When pollen grains land on the stigma(funny stick thingo on a flower), it wil start to grow a pollen tube, towards the ovary and the ovules. Then it GOES THROUGH the tube and =============*FERTILISATION*=====================
After pollination the pollen grains begin to?
Pollen grains and on stigma of a compatible plant; the pollen grains germinate and grow down the style and into the ovary. Once in the ovary a sperm nucleus from the pollen grain fuses with the ovule (and forms into a zygote or embryo). The pollen tube then degenrates and the ovule forms into a seed.
What is one way that pollen can get from the anther of a flower to the stigma of another flower?
It is transferred by wind or bees.
How seed are produced?
1 Once the pollen has landed on the sticky stigma of a pistil, a pollen tube starts to grow.2 The pollen tube grows from the pollen grain down the style.It grows into the ovary until it reaches the ovules.3 The sperm travels down the pollen tube and fertilizes the egg.
What is the purpose of the pollen tube?
Pollination is the placement of the pollen on the stigma of the carpal. This pollen transfer can be accomplished by wind, insects, built in mechanical discharge, and man. Once the pollen lands on the stigma, a series of chemical reactions takes place allowing the pollen grain to begin producing a structure called the pollen tube. As this is happening, the generative nucleus will divide and produce 2 sperm nuclei. This pollen grain with the pollen tube and 3 nuclei is considered the mature gametophyte. The pollen tube will work its way through the style of the carpal and touch the micropyle of the ovule. Here the sperm nuclei will enter the embryo sac and fertilize the egg and the two polar nuclei; hence the term double fertilization. The fertilized egg (2N) will develop into the immature seed plant, while the (3N) central cell will develop into the endosperm or food storage area of the seed.
How could a heavy rainfall on a fruit orchard in the spring result in a poor fruit yield in the fall?
I think that heavy rain on a fruit orchard in the spring would cause a poor fruit yield because all the pollen would be washed away, and therefore, the eggs would not be fertilized. The ovary, in which the ovules are contained, become the fruit once all the ovules are fertilized. The pollen is produced in the anther, and then they are transported to the pistil by different insects. The pistil contains the stigma, which is a sticky receptive surface where the pollen fall. The stigma also contains the style, which is the pollen tube through which the pollen reach the eggs. Now, if there is heavy rainfall, the pollen may not stick to the stigma, and then be washed away, or the insects may not come and transport the pollen to the stigma, which means that the ovary would never become a fruit.
The purpose of a pollen grain on a flower?
The purpose of pollen is to transfer the male reproductive cells (sperm) to the female reproductive cells (ovules) and thus to allow sexual reproduction. Pollen can be so transferred by many methods - wind, gravity, insects, etc. The pollen receptive part of the flower (the stigma) is often sticky, or textured so the pollen will stick. Once attached the pollen grain grows a tube into the stigma and down the style into the ovule. This tube allows the male gametes to fertilise the ovule, creating a seed.
What flower parts are involved in fertilization?
Fertilization takes place in the flower's ovary. The male gamete from the pollen is transported from the stigma down the style and into the ovary where it fertilizes the female gamete (the ovule).
How do seeds Reproduction?
it depends on gymnosperm (naked seed) or angiosperm (flowering plant) this is the angiosperm - Another germination event during the life cycle of gymnosperms and flowering plants is the germination of a pollen grain after pollination. Like seeds, pollen grains are severely dehydrated before being released to facilitate their dispersal from one plant to another. They consist of a protective coat containing several cells (up to 8 in gymnosperms, 2-3 in flowering plants). One of these cells is a tube cell. Once the pollen grain lands on the stigma of a receptive flower (or a female cone in gymnosperms), it takes up water and germinates. Pollen germination is facilitated by hydration on the stigma, as well as the structure and physiology of the stigma and style.[1] Pollen can also be induced to germinate in vitro (in a petri dish or test tube).[3][4] 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.[1
What parts of flowers attract insect?
The part of the plant that actually attracts insects is the colorful petals, once they've landed on it, the pollen attached to the stamens makes them stay and gather it. Certain insects can actually sniff out the actual pollen, but its the flower's color that initially draws them in.The pollen, which is produced by the stamen, or male part of the plant.The stigma attracts all the insects because when stinking fiys fiy around the plant is because of the pollen!
How do you xxplain the structure of the pollen grain describe the development of pollen grain and male gamete?
While still attached to the anther, the nucleus of the pollen grain divides, producing two nuclei, one of which becomes the tube nucleus, the other is called the generative nucleus. The generative nucleus divides again, forming two sperm cells. Once the pollen grain is released from the anther, it is transported (by wind or fauna) to the stigma of the female flower. Once a pollen grain has landed on the stigma, it begins to grow a pollen tube (there are three nuclei in the pollen tube, one from the tube nucleus, and the two sperm). When the pollen tube reaches the ovary, both sperm cells enter the ovule, one fuses with the egg nucleus, the other fuses with polar nuclei that is also inside the ovule, forming the endosperm.
