Compare a Coleus plant grown in bright light

Identification of genotypic and phenotypic manifestations in plants of different species (or varieties) growing in different conditions.

Purpose of the work: the study of hereditary traits using the example of plants.

Equipment: 1) hand-held magnifying glass, seeds of different varieties of peas (or beans, pumpkin), seeds of various plants (for example, apple, cherry, oak, maple, birch); 2) indoor plant coleus (or begonia, ivy, pelargonium).

Working process

Exercise 1

- Examine the appearance of the seeds of different varieties of peas (beans). Identify the common features of the seeds: color, rind and scar shape.

- Divide the seeds into varieties.

- Find common species characteristics of pea (bean) seeds and their varietal differences.

- Make entries in the table according to the example:

Assignment 2

- Compare a Coleus plant grown in bright light (on a windowsill) with a Coleus plant growing in a shaded area (far from a window).

- Determine the genotypic traits of the plant (shape of the leaf blade, type of venation, type of leaf arrangement, flower structure, type of inflorescence) and phenotypic.

- Compare the phenotypic characteristics of those and other plants (the number of leaves on the shoot, the color of the leaves, the size of the leaf blade, the length of internodes, the presence and size of inflorescences, phototaxis, leaf mosaic).

- Make entries in the table according to the example:

Coleus, which grows in bright light, is sometimes colored so intensely that next to it the same variety that grows not in the shade, but only in diffused light, seems completely different. And if grown completely in the shade, it will be the third coleus, an unfortunate, half-bald and completely faded creature! The photos show the same variety in summer and winter:

he loves moderate lighting!

I have a black dragon

I agree with Irina Popova. I will only get Coleus because of the exuberant color of the leaves. I always plant in the garden as curbs along the paths and along the perimeter of the flower garden. I don’t keep it at home, it grows quickly, it becomes liquid.

Municipal educational institution

secondary school number 2

Karasuk region

Educational - research work

"The influence of the environmental factor - light on the color of the leaves of indoor plants"

The work was completed by students of grade 4 "B":

Zhiltsova Natalia, Goverdovskaya Tatiana,

Shevchenko Olesya, Obukhova Yulia,

Gulyaeva Olesya.

Teacher -

2009

Last year, while studying in the "Young Florist" circle, we got acquainted with the variety of indoor plants. They learned to take care of flowers: loosened, watered, wiped dust, sprayed. And they also conducted observations, set up experiments, finding out the need for plants in water. We now know that not all plants need to be watered equally.

This year, we continue to be engaged in landscaping the classroom and the school corridor. But in order to grow a houseplant, you need to know not only the rules of care, but also the rules for placing the plant in the room.

therefore topic our work "The effect of light on the color of the leaves of indoor plants."

Target of our research: to reveal the influence of illumination on the color of leaves of plants with green and variegated leaves.

In the course of our work, we tried to solve the following research objectives:

1. Get acquainted with one of the most important factors in plant development - lighting.

2. To expand knowledge about the placement of light-loving and shade-tolerant plants.

3. Find out which plants need bright sunlight and which can grow in the shade.

4. Observe the leaves of Coleus and Spathiphyllum, compare their need for lighting.

Reading the informative literature about indoor plants, we learned that light is one of the most important factors that must be considered when growing indoor crops.

It is under the influence of sunlight in plant tissues that the process of photosynthesis takes place, as a result of which the growth and development of any plant organism occurs. Without observing the correct light regime, it is impossible to grow a beautiful and healthy plant.

Indoor plants can grow in both natural and artificial light.

To reveal the influence of light on the color of the leaves, we have done experimental work.

For the experiment, we used a plant with variegated leaves - coleus and a plant with green leaves - spathiphyllum.

COLEUS SPATIFILLUM

One plant was removed to a shaded place behind the cabinet, and the other two were placed on the windowsill, where the color was bright. They began to observe and put the results in the table.

Our observations

Changes the date	What happened to the plants
Coleus in the shade	Coleus in the light	Spathiphyllum in the shade	Spathiphyllum in the light
December 1st	The leaves are bright, have a variegated color in the center.	The leaves are bright, have a beautiful motley color in the center.	The leaves have a rich dark green color.	The leaves have a rich dark green color.
December 2nd	No changes	No changes	No changes	No changes
December 3	No changes	No changes	No changes	No changes
4 december	No changes	No changes	No changes	No changes
5th of December	No changes	No changes	No changes	No changes
8 december	Leaves are less bright	No changes	No changes	No changes
9th December	No changes	No changes	No changes	Leaves are not as rich as they were before
10 december	No changes	No changes	No changes	No changes
December 11th	In the center of the leaf, the bright burgundy color has become paler	No changes	No changes	Have a green color, but it is less saturated
12 December	No changes	No changes	No changes	No changes
December 15th	The leaf turns green, a pale pink spot remains in the center	No changes	No changes	No changes
December 16	No changes	No changes	No changes	No changes
December 17	The leaf has turned pale green, and the motley color is disappearing more and more	No changes	No changes	The leaf is green, but not as bright as it was.

In the course of observations, we noticed that over time, the leaves of the coleus, which was in the shade, faded, became pale green, almost colorless, and the bright variegated shades of red and brown disappeared. Spathiphyllum, in the shade, felt good. Its leaves were still the same green as before. But the leaves of the spathiphyllum, which was on the windowsill, became less bright.

To prevent our plants from dying, we returned the Coleus to the windowsill, and the spathiphyllum was removed to a shaded place.

From our observations, we concluded that plants with dark green leaves require less light than plants with variegated leaves. Plants with variegated leaves are photophilous.

To be convinced of the correctness of our judgments, we again turned to the literature and this is what we found out.

To prevent the plant from suffering from a lack of light, it is important to place it correctly in relation to the light source.

All indoor plants are divided into light-loving, shade-tolerant and shade-loving. Each group requires certain conditions.

Now we know that plants such as coleus, pelargonium, which we used to call geraniums, dieffenbachia, crested chlorophytum (with white stripes), Kalanchoe are light-loving plants. They prefer good lighting and therefore should be placed on south-facing windows.

Since the light from the window does not fall vertically, but from the side, the pots with light-loving plants need to be periodically turned, then the shoots will not stretch and deform from a lack of light.

But there are plants, such as zygocactus, which, on the contrary, cannot be rotated or rearranged from place to place. This can cause the buds to fall off.

There are also shade-tolerant plants in our class. These are aloe, chlorophytum, cissus (popularly called indoor grapes), cyperus, hoya, spathiphyllum, ear syngonium, sansevier, peperomia, spurge, balsam (popularly called "Vanka wet") and asparagus.

These plants tolerate shade well, so they can also be placed on northern windowsills.And if this is not possible, then at some distance from the windows, in the back of the room.

It is possible to determine the excess of light in shade-loving plants by the color of the leaf - it becomes lighter, which we observed in the spathiphyllum during the experiment.

For the experiment, we raised the coleus ourselves and learned a lot in the process of growing.

Coleus is native to the tropical regions of Asia and the island of Java. This plant is one of the most attractive indoor plants. There are about 150 species of this plant. We have only three: Coleus Blume - the most common, Coleus Blume "Scarlet Ponejo" (with leaves in red spots), Coleus Pumila "Fantasy" (with very small toothed leaves).

OUR COLUMN BLOTTED ON WINTER HOLIDAYS

When growing coleus, you must remember:

REMEMBER	GROWING: SIMPLE IF THE PLANT IS USED AS ANY YEAR OLD	BLOOM: DEPENDING ON THE TYPE (our Coleus bloomed during the winter holidays)
LOCATION: WELL LIGHTED PLACE	HEIGHT: UP TO 90 CM
TEMPERATURE: MINIMUM 12 C	TRANSITION: SPRING
WATERING: NEEDS MODERATE WATERING, AND IN SUMMER ABUNISHING AND REGULAR	MAINTAINING APPEARANCE: NOT REQUIRED IF THE PLANT IS ANNUAL, AND MULTI-YEARS SHOULD BE NECKED

We consider the work done to be effective and useful, because we learned a lot, we can apply our knowledge in practice, give advice to our classmates, friends, acquaintances on caring for indoor plants. We want the school to have more flowers. After all, plants not only make the air cleaner, but also delight us with their beauty.

COLLECTION OF LIGHT-LOVING PLANTS

COLEUS

KALANCHOE

PELARGONIUM

DIFFENBACHIA

CHLOROPHYTUM COOL

OUR CLASS SHADOW PLANTS

ALOE TIGER

CHLOROPHYTUM

CISSUS

(ROOM GRAPE)

CIPERUS

Hoya

SPATIFILLUM

SYNGONIUM EARLED

SANSEVIERA

(PIKE TAIL)

PEPEROMIA

SPURGE

BALSAMIN (VANKA WET)

ASPARAGUS