A flower is the most amazing part of the majority of flora representatives, which has various options for form, aroma and color. But how is it that flowers multiply? Each flower has stamens and a pistil - these are its reproductive organs.
What does a pestle consist of?
A pistil is a bud element made up of many carpels. In some plant species, not one pistil can be found, but 2 or more.
Its lower part is usually swollen, dense and is called an ovary, which smoothly passes into a narrower column and stigma. There are also species, for example poppy, in which the column in the pestle is absent, and the ovary immediately passes into the stigma. The upper part of the pestle is designed to capture pollen during pollination, so the shape of the stigma is different - star-shaped, filiform, lobed, cirrus. The height of the column depends on the ability of the stigma to recognize and capture pollen grains.
Where do the seeds come from?
Pestle is a seed storage. Future seeds in the form of ovules are stored in the ovary of a pestle. In the process of pollination, pollen moves along the column deep into the ovary, seeds are formed, and the ovary itself turns into a fetus. That is why it is considered the most important part of the flower.
All flowers are divided into bisexual, same-sex female and same-sex male. The bisexual family includes rye, peas and cherries. Same-sex female plants lack stamens in the bud, and same-sex male plants have no pistil. Among same-sex can be found cucumber, sea buckthorn, poplar. The flowers of these plants can be partly male and partly female.
How are flowers pollinated?
If with bisexual plants everything is clear, they multiply in the process of self-pollination, then with unisexual plants it is much more complicated. More often male and female buds grow on the same plant (tree, shrub). Without the help of insects, pollen is transferred from male flowers to the female pestle. These are pumpkin crops, hazel and cucumbers. Those dioecious plants are those in which shrubs with male and female flowers grow separately. Most of them are representatives of the urban flora (aspen, poplar, nettle, dandelion and willow).
Answering the question: âA pestle is what: a vital organ of a flower or an accompanying element of the evolutionary process?â, We can conclude that pollination is impossible in principle without a pestle. But the evolutionary division of plants into male and female brings to the human life certain inconveniences, for example with poplar fluff - with its help, seeds from the male tree fall on the seeds of the female.