Plant growth is not an ongoing process. In most plants from time to time there are periods of rapid deceleration or even almost complete suspension of growth processes, periods of rest.
Regulation of resting processes is of importance in the practice of plant growing. There are many ways to get the plant out of rest.
Peace of Plants
In a resting state, both the plant as a whole and its individual parts (seeds, roots, tubers) can enter. In some cases, the plant may be in a growing state, and the individual buds are at rest (asleep). The transition of a plant or its individual organs to a resting state is primarily an adaptation to the transfer of unfavorable conditions.
In most areas of the globe, there is a periodic occurrence of season unfavorable for plants. These are periods of low temperature or low humidity. In these cases, the plant remains viable only when it enters a state of rest. The transition to a resting state is often accompanied by the loss (fall) of individual organs (leaves) or even whole shoots. It is in this state that perennials survive the winter period. Thus, the transition of a plant to a resting state protects it from death under the influence of frost or severe drought. However, peace is not only a protective reaction of the body against unfavorable conditions. Plants pass into a resting state and in the presence of all the conditions necessary for growth. The temporary suspension of growth processes is also characteristic of tropical plants, despite year-round favorable conditions. If the plant has not passed the rest period, in the subsequent growth rate it decreases, fruiting deteriorates. After a period of rest, the growth of plants is intensified. Thus, the rest period is not only an adaptation to unfavorable conditions, but also a necessary link in the ontogeny of plants.
Distinct peace is forced and profound. Forced rest is caused by unfavorable conditions. Usually a plant organism enters an involuntary rest in the absence of any factor necessary for growth processes. As soon as this factor changes in a favorable direction, the growth processes resume. Dry seeds do not germinate until there is enough water. Some seeds need light for germination. In the spring, the buds do not dissolve until the temperature rises to a certain limit. Once the plant is provided with the necessary conditions for growth, it easily leaves the forced rest.
From a deep dormancy the plant comes out only after the completion of certain physiological and biochemical changes that prepare the subsequent growth. Forced and deep peace can coincide in time.
Along with the slowing down of growth in the period of rest, the intensity of all exchange processes decreases.
Peace of the Kidneys
Growth processes are concentrated in the kidneys, so they first of all enter into a resting state. In rest can not enter all the kidneys located on this plant, but only individual.
The steady state of the kidneys falls on a period of low temperatures. Entry into the period of rest occurs even at sufficiently high temperatures. The signal for entering into rest is a certain ratio of day to night. Plants enter into rest under the influence of a shortened day and leave it under the influence of a long day. The organ that perceives the duration of daylight is either leaves or kidneys. With a short day in the plant, hormones are produced that cause growth retardation in the kidneys and, on the contrary, hormones that stimulate growth are produced on a long day. When you enter a period of rest in the kidneys, a number of processes occur that increase the resistance of plant cells to unfavorable conditions. Increasing the viscosity of the cytoplasm, separating it from the cell walls, increasing the lipid layer during the rest period leads to a decrease in the intensity of the metabolic processes.
Kidney Disease As a Remedy for Early Distillation of Plants
Physical effects sometimes have a big impact on the bud budding. One way to show the influence of some physical effects on the dissolution is the chipping of the kidneys. The injection is done at the base of the kidney and so deep that the tip of the needle reaches its middle. The kidney thus punctured is rapidly growing. Branches of plants with injured kidneys are put in a warm greenhouse, and they quickly move into growth. The method of water injection gives even better results. If you enter the same way with a syringe water, you can watch as an injection of water droplets through the entire kidney and hangs on the tip of the kidney. When injecting instead of water a weak solution of ethyl alcohol or ether, forcing is greatly accelerated.