has long been proven that plants - are living beings.They, as well as animal feed, breathe, breed.In them there are thousands of biochemical reactions that form useful nutrients are derived as a result of the decay products of metabolism.That is, all of the processes that characterize the manifestation of life, present in plants that make our planet incredibly beautiful, clean and varied.
Biological rhythms
How plants breathe?Why do leaves turn yellow from them?What do they eat?How to grow?Many questions arise from those who see these amazing creatures as diverse, beautiful, bright and colorful.
All plants are characterized by certain biological rhythms, as well as for other living organisms.These include:
- dehiscence buds and closing under the influence of day length and chemical composition of the environment;
- intensive increase mass escape;
- compression and opening of stomata on the leaves;
- strengthening or weakening of breathing, photosynthesis;
- leaf and others.
Thus, the answer to the question of why leaves turn yellow plants, lies in the mechanisms of biological rhythms.These processes allow them to adapt to their environment to survive in them, to carry out vital functions as efficiently as possible, to grow and develop to respond to chemical and physical effects from the nature of man, animals and so on.
Why yellow leaves on the trees, for example?It is also one of the manifestations of the biological rhythm, aimed at preserving the viability of individuals at lower temperatures and reducing the amount of sunlight and moisture.The color of the leaf is determined by the specific substances in its composition.
plant pigments contained in the leaves
Why turn yellow and the leaves are falling?Yes, because there is a reorganization of chemical reactions within the plant body.Each representative flora contains in its structure a number of pigments - substances that determine the color organs (leaves, corolla, stems, etc.).In total there are four main groups of compounds:
- Chlorophyll .Pigment containing in its structure and some magnesium cation porphyrin rings.It gives the plants and parts of the rich green color, takes an active part in the process of photosynthesis.That when exposed to light for plants convert solar energy into chemical energy.So formed reserve nutrients - starch.Under favorable conditions, evergreens chlorophyll is in the vast majority, so other pigments are not shown.
- Xanthophyll .The compound contained in the composition of all the individuals, but does not occur under favorable conditions, as suppressed chlorophyll.Many algae in the corolla of flowers, this pigment in stems manifests itself, forming a yellow color.
- carotenoid .Orange leaves, part of the shoot, the corolla is defined precisely by this compound.Often it suppressed chlorophyll and manifests itself only when the onset of cold weather, adverse environmental conditions.
- Anthocyanins - pigments that cause the formation of beautiful red hues from parts of plants.Just like the previous two, it is manifested in the natural form only in the corolla of flowers or seaweed (red algae).Changing conditions and the destruction of the porphyrin ring of chlorophyll causes a strong effect of anthocyanins.
All these pigments are primarily provide the external reaction to the change in the state of individuals.Why do leaves turn yellow plants, causing such symptoms, take a closer look.
reasons leaf fall from trees
phenomenon of leaf fall - one of the most beautiful in nature.That is why the fall - a favorite time of year many poets.After all the surrounding beauty can not but be a source of inspiration for creative people.Multicolor round, yellow, green, red, orange or even brownish-purple hues just circling his head, and the smell of fallen leaves smell pleasantly pleased.
What caused such changes and whether it is always right?Consider the causes leaf fall from trees.They can be divided into two groups: natural and forced.Each includes a row of items, and the explanations for them.
Natural
For those reasons include seasonal change of weather conditions, and changes in day length.All summer green giants are preparing for this rhythmic change.Accumulates nutrients and store them in the stems and trunk, are active in the processes of photosynthesis and respiration, consume the maximum possible amount of moisture.
With the onset of cold weather, the shortened days of light inside the leaf plates begin conversion.
- pigment chlorophyll begins to act less, the color fades.This gives an opportunity to show other pigments.As a result, the leaves turn yellow, red and so on.What will be the color of fallen leaves it depends on the genetic characteristics of tree species.And the interesting fact that is brighter than the sun in the autumn, the chlorophyll breaks down quickly and leaves turn yellow.During heavy rains the trees longer pleasing greenery.
- During the summer period in plates sheets accumulate a lot of metabolic products, salts and minerals.This makes a sheet of heavy, and he gradually begins to peel off in the area stem from the stem.
- At the base of the stem, between him and the trunk, and the process of education of special fabric layer, gradually rejects sheet.
- Under the influence of mechanical factors (rain, wind, storm, etc.), its own gravity all the leaves begin to fall one by one.
Forced
On the question of why leaves turn yellow, there is another answer.This happens internally reasons, such as:
- sharp fluctuations in temperature;
- lack of mineral nutrition;
- lack of sufficient moisture or a surplus;
- harsh direct sunlight;
- livelihoods parasites.
These factors lead to a decrease in the viability of trees.That's why leaves turn yellow on them.
plants
Many gardeners also raises the question: "Why do leaves turn yellow flowers?"Often you will notice drooping parts of plants, their unhealthy, pale appearance, and this concerns not only the flowering species, and ferns, redkotsvetuschih plants and succulents.What is the reason, try to understand.
Causes yellowing
Why do leaves turn yellow flower?
- Excessive or insufficient watering.
- too bright sunlight or lack of it.
- shortage of potassium, magnesium and other minerals.
- affected part of the shoot or root pests.
- Excess dust, fungi and bacteria.
These are the most common causes yellowing of leaves from plants.
methods eliminate the phenomenon
Before you take action, you need to determine the specific cause of why leaves turn yellow flower.To do this, examine the material for the care of each individual plant, in fact any of them requires an individual approach.
Next, you need to limit the limiting factor in the development, if it is insufficient irrigation - to increase it if the excess - reduce, to protect from the sun, or to add it to feed fertilizers, but not to overdo it.The main thing - remember that flowers love cleanliness.Therefore, they must be protected from dust, dirt and debris.
