Do plants have dormant? What is plant dormancy

Most plants grow through periods of seasonal adverse climates, such as the differences in light, temperature and rainfall between the four seasons in temperate zones, and if there are no defense mechanisms, plants can be injured or killed. Dormancy is a phenomenon in which the growth of the whole or a part of a plant is temporarily stopped, and it is a self-protective biological characteristic of plants to resist the unfavorable natural environment. There are many types of dormancy, with plants in temperate regions dormant in winter, and plants in areas with hot and arid summers, such as rubber grass, in summer.

Plant dormancy due to environmental conditions that are not conducive to growth is often referred to as epistotic dormancy. Under suitable environmental conditions, dormancy caused by the internal reasons of the plant itself is called physiological dormancy. Generally speaking, dormancy mainly refers to physiological dormancy.

There are many forms of dormancy, and most of the first and second year plants use seeds as dormant organs; Perennial deciduous trees spend the winter with dormant buds; A variety of biennial or perennial herbaceous plants survive the adverse environment with dormant roots, bulbs, bulbs, tubers, tubers, etc. Narcissus, calla lily, cyclamen, bamboo, begonia, five-needle pine, rhododendron, junzi orchid, yueji, etc., like to freeze, sensitive to heat, in the summer high temperature and other meteorological conditions, dormant or semi-dormant state.

Plant sleep, or plant sleep, is known in plant physiology as sleep movement, and it is both an interesting natural phenomenon and a scientific mystery that scientists have been actively exploring for more than a hundred years. On a clear night, we just have to look closely.

Yes In the north, most of the plants do.

Yes, for example, "Cranes Come" will sleep in the summer.

A dormant plant is a plant that is dormant for a certain period of time during the growth period. Dormancy refers to the phenomenon of temporary pause in the growth and metabolism of the plant body or plum peel and its organs at a certain period of development; It usually refers to a phenomenon that is determined by internal physiological reasons, and cannot germinate and grow even if the external conditions (temperature, moisture) are suitable. Seeds, stems (including bulbs, tubers), and shoots on roots can all be dormant.

Plants live in cold, hot, dry and wet seasonal changes in the climate of Naring, seeds or buds enter a dormant state before the arrival of the unfavorable climate season, which can avoid the state of vigorous life resistance and susceptibility to adversity to survive the harsh periods such as cold and drought. Therefore, dormancy has important adaptation significance for areas with cold winters at high latitudes and areas with water scarcity in dry seasons at low latitudes.

Plants dormant in winter are a "measure" to resist adverse environmental threats such as low temperaturesIn the long-term development of nature, plants have developed a variety of dormant overwintering methods. For example, annual plants survive low temperatures by dormant mature and dry seeds; Most perennial plants overwinter with deciduous trunks, buds, or dormant tubers, bulbs, rhizomes, etc.

Plant dormancy is compatible with climate change. As early as the fifties, scientists discovered that whenever summer turns to autumn and the temperature gets colder, plants produce hypnogen, which promotes fruit and leaf shedding and inhibits growth, and prepares to go into dormancy. After the beginning of spring, the hypnohormone in the dormant buds is gradually converted, and the auxin gradually increases.

As the temperature rises, the buds begin to grow. At the end of autumn, the leaves fall off, and a lot of material is stored in the trunk and buds in advance, and the low temperature promotes the conversion of starch into sugar, which increases the cell concentration, lowers the freezing point, and makes the cells less prone to freezing. In this way, the protoplasmic colloids can be kept from solidifying when cold.

In addition, after the leaves fall off, the evaporation is greatly reduced, and the free water in the plant tissues is reduced, which is relatively wide and increases the content of bound water, which is conducive to resistance to cold. To overcome the cold, the protective tissue on the surface of the tree's branches and buds is thickened. After this series of wintering preparations, the plant "sleeps" peacefully when the cold comes.

During the dormant period, the metabolic function of the plant is very weak, and the absorption of nutrients, water, etc., and the exchange of substances with the outside world are very slow, and the growth almost stops. After the beginning of spring, it begins to sprout and grow again.

In the long-term production practice, it has been learned that transplanting, cuttings and pruning are the most suitable times during the "sleeping" period of plant dormancy. At this time, not only is the seedling easy to move, the nutrient loss of the plant is less, and it is easy to survive. Therefore, it is also the best period for afforestation.

A plant that can survive with a temporary rest.

Life is inseparable from water, but some plants can sustain life in unique ways without water.

When some plants in the desert lack water, they can temporarily dormant and stop life activities temporarily. For example, evergreens and plants of the same species as ferns and equisetae curl up into small, gray, dry balls when there is a shortage of water. But just water it a little and it will slowly soothe and regain greenery.

A total of about 30 species of these plants are known. British botanist Pitzel Scott extracted the gene from a plant in South Africa that is "dry and dormant" and transplanted it to several common houseplants. In this way, the owner of the house can go on vacation with peace of mind, and the houseplants stored in the home will not die due to not watering every day.

The first water after returning and it will revive.

Scientists plan to transplant this gene into crops so that they can resist drought and be harmless.

Many animals hibernate in the phenomenon, among which we are familiar with frogs, snakes, bears, hibernation is an adaptation of animals to environmental conditions such as low temperature and little food in winter. And there is also a case of dormancy, which is a kind of adaptation of animals to the hot and dry season. For example, when summer comes, the temperature of the upper sea water rises due to the strong sunlight, and the small creatures on the bottom of the sea will go to the upper layer of the seawater, and the sea cucumber will start to sleep due to food shortage.

Sand tortoises and steppe tortoises also enter the dormant period due to high summer temperatures.

Dormancy is a state in which an animal's vital activities are at a very low level, usually manifested by cessation of feeding, inactivity, lethargy, weak breathing, and a drop in body temperature. Before entering human sleep, these animals are actively foraging for body fat in order to prepare for the dormancy and awakening periods. In this process, the dormancy of cold-blooded animals is different from that of hot-blooded animals, where cold-blooded animals decide whether to sleep due to external temperature, while hot-blooded animals control their body temperature and go to sleep.

Plant cells can be transformed from solution state to lysocrystalline state, with low metabolic rate, maintaining the lowest metabolic demand, and cell transformation is in lysomorphic state, which is more resistant and more frost-resistant.

This is a kind of survival and self-protection ability of animals and plants, which is influenced by genetic factors, and the genes inherited by the earliest animals and plants in order to survive led to the dormancy of modern animals and plants.

It is a kind of genetics for self-protection, not all animals and plants will be dormant, just individual cases, so this belongs to the category of genetics, which is a kind of genetics for self-protection.

For example, animals are difficult to find food in the harsh winter, so they will choose to sleep to reduce their own energy and calorie loss, which is the survival law of nature.

Dormancy is the evolution of animals and plants in order to survive unfavorable periods.

Dormancy is a necessary life activity, such as the photosynthetic lunch break phenomenon of green plants, which is to adapt to the arid environment, and the dormancy of seeds is also to grow and develop at the right time.

Plants and animals are dormant to better adapt to their environment, and this is controlled by genetic factors.

Animals adapt to changes in temperature through dormancy. There are many animals that hibernate, in addition to frogs and snakes, there are also bats and hedgehogs. The most common example of hibernation around us is a snail hibernating in its shell.

Dormancy is the physiological response of animals to extreme temperatures. During this time, animals usually stop eating, become inactive, lethargic and breathe weakly. Of course, before going into hibernation, the animal will eat a lot of food for the needs of the dormant period and the awakening period.

Dormancy is a state in which the animal's vital activities are at a very low level, usually manifested by stopping eating, inactivity, lethargy, weak breathing, and a drop in body temperature. Before going into hibernation, these animals actively forage for body fat in preparation for dormancy and awakening.

Yes. Plants also need sleep, for example, there is a legume called red clover, and in the sun, one sees three small spitts on each of its petioles in the air. When night falls, the three lobules fold together and they hang their heads and begin to sleep.

This is typical of plant sleep.

This change of day and night occurs in an approximate 24-hour cycle, even in complete darkness. Botanists call this phenomenon sleep movement. The biological clock in plants was first discovered from this phenomenon.