Biological causes of yellowing of plant color

It doesn't get enough light, but its total synthesis is still greater than its consumption, otherwise the plant will not be able to grow and survive.

Dehydration or contracting a virus.

Lack of adequate light.

The synthesis of chlorophyll is related to light exposure.

The yellowing of plant leaves is mainly caused by factors such as light, water, fertilization, soil, pests and diseases. Usually need to place the plant in a diffuse, ventilated environment to grow, according to the plant's own growth and changes in the surrounding environmental factors, regular quantitative watering and fertilization, and do a good job in the prevention and control of pests and diseases, which can reduce the occurrence of yellowing of plant leaves.

Watering plants too much or too little can cause the leaves to turn yellow. When the plant is overwatered, the soil at the bottom of the pot is too waterlogged, which can cause the root system of the plant to rot and the leaves of the plant to turn yellow. When watered too little, the soil will become arid, and the amount of water absorbed by the plant growth will not be enough, affecting normal growth, causing the leaves of the plant to turn yellow and wilt.

According to the actual situation, water regularly and quantitatively.

Plants need light to grow, and too much or not enough light can cause yellowing of leaves. When the sunlight is too strong, the leaves of the plant will be burned by the sun, causing the leaves to wilt and turn yellow, so take shade and sun protection measures. When the plant is in a long-term lack of light, the plant cannot carry out normal photosynthesis, at this time, the plant should be placed in a place with sunlight scattering and ventilation.

Excessive or lack of fertilization is also one of the causes of yellowing of plant leaves. When excessive fertilization, it will cause organic matter to transpirate and heat up in the soil, burn the root system of the plant, and cause the plant to wither or die. When the fertilization is insufficient, the general plant leaf growth will turn yellow, and nitrogen, phosphorus, and potassium fertilizers are applied in time.

When plants are exposed to pests and diseases, they can also cause yellowing of leaves. At this time, it is necessary to prune off the dead branches, diseased branches, and yellowed leaves of the plant, place them in a ventilated place, carry out maintenance management, and spray dichlorvos, carbendazim, podoldo and other agents to control pests and diseases.

Garland is the flower that changes the most color, it is green when it first opens, and the next day the petals turn yellow in the middle, bright red at the tips, golden yellow on the edges of the petals, and the green part gradually changes from yellow to bright red after three days.

Purple lantana.

And yellow-flowered lantana are varieties that can change color, purple-flowered lantana is pink in the early budding stage, pink orange before flowering, and then will gradually turn yellow or red, yellow-flowered lantana is goose yellow when it buds, yellow during flowering, and then orange-yellow.

Anthurium. It is also a plant that changes color, it is a fleshy cone inflorescence that gradually opens from bottom to top, the color of the flowers will change from yellow to flesh, then slowly turn to pink-orange, and finally to bright red, and after a few weeks of opening, its inflorescence will gradually turn green.

The perfume is yellow at the beginning of flowering, then gradually turns orange, becomes dark pink when it is in full bloom, and slowly fades to a very light pink or white after the flowering period, and the whole color change process is from light to dark to light.

Causes of plant discoloration: Changes in pH cause chlorophyll and anthocyanins.

The change in content causes the plant to change color as a result.

There are two main reasons for this:

a) Pigment changes.

For example, the new leaf has less chlorophyll and cannot suppress other pigments, if it is carotene.

Lutein shows yellow-green, or the red color of anthocyanins; When the leaves grow and the chlorophyll increases, it shows green; When the leaves fall, the chlorophyll is destroyed, revealing the color of other pigments.

2) Changes in the environment.

Morning glory contains anthocyanins (anthocyanins are the same as litmus, neutral purple, acid red and alkali blue). At the beginning of the flower, the environment is alkaline, and the flower color is blue; As the opening hours increase, carbon dioxide.

As the concentration increases, the acidity increases, so the anthocyanins turn from blue to purple, and finally show red when they wither.

There are also pure solution dilutions, the color of such plants is darker in the bud stage, and after flowering, due to the increase in water content and volume, the pigment solution is diluted and the color becomes lighter.

Morning glory also has some plants that change color in the fall.

Sweetgum, Chongyang wood, ginkgo, tulipwood, Acer truncatum, Acer chinensis, Cochinensis, Nantian bamboo, mountain hemp pole, heather.

Autumn-colored foliage species are classified according to leaf color, color change period, and whether the tree species loses leaves in winter. First, according to the different leaf colors, the autumn leaf tree species are divided into four categories. Red leaves such as sweetgum, maple, chongyang wood, coxagulus, black tree, Nantian bamboo, ground brocade, persimmon, etc.; Yellow leaves such as ginkgo, soapberry, luan, tung, mulberry, etc.; orange leaves such as salinus, zelkova, coptis chinensis, etc.; Purple and red leaves, hemp, sumac, etc.

Second, according to the period of leaf color change, the autumn leaf tree species are divided into two categories: single autumn color change and spring and autumn color change. The former such as ginkgo, coxagulus, persimmon, sumac, etc.; The latter such as sweetgum, hemp, heather, etc. Third, according to whether the leaves fall in winter, the autumn leaf tree species are divided into two categories: evergreen and decided.

The former such as heather, Nantian bamboo, etc.; The latter such as sweetgum, coxaculus and so on. Most autumn-colored foliage species are deciduous species.

Plant leaves can change color a lot.

In general, the young leaves of trees that grow at the beginning of spring are mostly pale red.

When you grow up, you turn green.

And trees that shed their leaves in autumn and winter.

Before the leaves fall, the leaves will turn yellow-brown before falling off! Like a maple tree.

Black Tree Tree. The leaves of sumac trees and other trees are originally green.

But it will turn red in autumn and winter! Hibiscus that blooms in summer and autumn will change color.

It is usually white or slightly pink in the morning.

Turns pink at noon.

In the afternoon, it turns deep pink or even red.

So it's also known as Drunken Hibiscus! Another flower that changes color is hydrangea.

Originally, the hydrangea was white.

Purple. Pink.

Powder blue and so on. But its color is not stable.

Because it is made up of a lot of small flowers, a flower bulb.

Each floret has a different shade of bloom in order.

So the colors are different in the morning and evening.

Sometimes pink turns to pink blue! Generally, the fruit is turquoise when it is not ripe.

But when ripe, some of them turn yellow.

Orange or even red! Common lemons.

Tangerine. Papaya.

Lotus Mist. Lychee and so on.

It's all about changing color after ripening!

Reference: My response.

Garland: The flowers are green at the beginning of the bloom and yellow in the center of the petals the next day. Anthurium.

The flowers change to yellow, flesh, pinkish-orange, and finally green. Pink palm: The Buddha flame bud is bright and gorgeous.

Kalancho flowers: with multiple color-changing varieties. Romantic:

The buds are red in the early stage and pale when they are near the end of the day.

1, Garland

The flowers are green at the beginning of the flower, and the next day the petals will turn yellow in the center, bright red at the tip, and golden at the edges, and after three days, the base of the flower will be golden, orange-red or bright red, and the center will be bright red.

2. Anthurium

The flowers of Anthurium change over time, from yellow to flesh-orange to green, and the plant's fleshy spikes to open from bottom to top.

3. Pink palm

Pink palm, also known as pink champion, is a perennial evergreen herbaceous flower of the Araceae family, its Buddha flame bud is bright and gorgeous, extremely varied, belongs to one of the common plants that will change color, and the plant likes a cool and ventilated environment.

4. Longevity flowers

There are a variety of longevity flowers, among which Nugget Gold, Caroline, White Longevity and so on are all longevity flowers that will change color, such as the beginning of the Nugget Yellow flowers, then turn to light orange yellow, flesh color, apricot color, and finally orange-red, and the white longevity flowers are white when they first bloom, and when they are near the end of the flowering period, the color is pink.

5. Romantic

Romantic is a species that changes color during the moon season, with red or orange-red flower buds that turn yellow or light pink in the later stages of the plant and pale when they are about to wither.