Types of plant stems, how many types of plant stems are there What are the main characteristics of s

The red and purple impatiens have reddish stems, and the darker the color, the darker the flowers; If the stems are plain green, the flowers will be white, or very pale pink. I can't say the specific reason, I can only say that, the flowers are white because the cell fluid does not contain pigment, so the plant also shows ordinary green (green because of chlorophyll, which is found in general plants): red and purple flowers are the effect of anthocyanins, that is to say, red and purple impatiens plants, in addition to containing chlorophyll, there are also anthocyanins, so the plant will show red.

Looking for it, a flower grower said.

The stems are generally cylindrical; Some stems are square, like those of Lamiaceae; Some are triangular in shape.

such as the stems of sedges; Some are flattened, like the stems of a cactus. The center of the stem is often solid, but the stem of some plants is hollow, such as celery, carrots, pumpkins, etc. The stems of grasses such as rice, wheat, and bamboo are hollow and have obvious knots, which are called stalks.

The parts of the stem with leaves and axillary buds are called nodes, and the internodes between nodes are called internodes. Nodes and internodes are the main morphological characteristics of stems, while roots have no nodes and internodes, and there are no leaves on the roots, which is the main difference between roots and stems in appearance. At the place where the leaves are born, the angle between the leaf and the stem is called the leaf axil, and the tip of the stem and the leaf axils have buds.

Generally, the stem nodes of plants are only slightly enlarged at the part where the leaves are born, while the stem nodes of some plants are particularly obvious, forming a bulging ring, such as hyssop.

Caryophyllus, maize.

There are also plant stem nodes that are smaller than the internodes, such as lotus root. The length of the nodes of various plants is also inconsistent, and the length can reach tens of centimeters, such as bamboo and pumpkin; The short ones are less than 1 mm, such as dandelions.

Some plants have two types of branches, one with longer internodes, called long branches; Another type of internode is very short, called short branches, such as ginkgo biloba and pine.

The stems of the plant are divided into above-ground stems and underground stems.

Aboveground stems are further divided into: leafy stems, tendrils stems, fleshy stems, and stem spines.

Underground stems are further divided into: rhizomes, tubers, bulbs, and bulbs.

Leaf-like stems include: cactus, false leaf tree, etc.

The tendril stems are: pumpkin, cucumber, grape, etc.

Succulent stems are: succulent, etc.

Stem thorns are: hawthorn, soaphorn, etc.

Tubers are: potatoes, etc.

The rhizomes are: lotus root, ginger, etc.

Bulbs are: water chestnut, mushroom, etc.

Bulbs are: onions, garlic, etc.

The role of plant rhizomes.

Conduction: Water and inorganic salts absorbed by the root hairs are transported along the stem mainly from the bottom up but in plants with weeping branches.

Supporting effect: The stem relies on the well-developed mechanical organization inside to withstand the full weight and pressure of branches, leaves, flowers and fruits.

Storage: Starch, sugar, fat, and protein can be stored in the stem for plant utilization.

Reproduction: The use of stems and techniques for cuttings, strip nucleus clearing, grafting, and the use of underground stems for propagation has been an important measure in afforestation and crop cultivation.