What is burdock taproot or fibrous

Taproot - Taproot

The large single root of plants like the dandelion, which grows vertically downwards and has smaller side roots
The two types of root systems in plants. The fibrous root system (A) is characterized by many roots of similar sizes. In contrast, plants using the taproot system (B) will grow a main root with smaller roots branching off from the taproot. The letters mark the beginning of the roots.

A Taproot is a large, central and dominant root from which other roots sprout laterally. Typically, a taproot is somewhat straight and very thick, tapering and growing straight down. In some plants, such as the carrot, the taproot is a storage organ so well developed that it was grown as a vegetable.

The The taproot system is in the Contrasted with the random or fibrous root system of plants with many branched roots, but many plants that form a taproot during germination continue to develop branched root structures, although some based on the main root can keep the dominant taproot for centuries, for example Welwitschia .

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Dicots, one of the two divisions of flowering plants (angiosperms), begin with a taproot, which is a major root that forms from the seed's enlarging radicle. The rooster root can be persistent throughout the life of the plant, but is most often replaced by a fibrous root system later in the plant's development. A persistent taproot system forms as the radicle continues to grow and smaller side roots form along the taproot. The shape of the taproots can vary, but typical shapes include:

  • Conical root: This type of tuber is conical in shape, ie widest at the top and tapers steadily downwards: e.g. B. Carrot.
  • Fusiform root: this root is widest in the middle and tapers up and down: e.g. B. Radish.
  • Napiform root: the root has a top-like appearance. It is very wide at the top and suddenly tapers like a tail at the bottom: e.g. turnip.
The edible, orange part of the carrot is its taproot

Many tap roots are converted into storage organs. Some plants with taproots:

Development of tap roots

Taproots develop from the root of a seed, which forms the primary root. It branches into secondary roots, which in turn branch into tertiary roots. These can branch out further to form roots. In most plant species, the radicle dies some time after the seeds germinate, leading to the development of a fibrous root system that lacks a main root that grows downward. Most trees begin life with a taproot, but after a year or a few years the main root system transforms into a widespread fibrous root system with mostly horizontally growing surface roots and only a few vertical, deeply anchored roots. A typical mature tree, 30 to 50 m tall, has a root system that extends horizontally in all directions until the tree is tall or taller, but up to 100% of the roots are in the top 50 cm of the soil.

The soil properties strongly influence the architecture of the taproots. For example, deep and rich soils favor the development of vertical taproots in many oak species such as Quercus kelloggii , while clay soils encourage the growth of multiple tap roots.

Horticultural considerations

Many plants with taproots are difficult to transplant or even grow in containers because the root grows deeply quickly and, in many species, relatively minor obstacles or damage to the taproot slows down or kills the plant. Among weeds with tap roots, dandelions are typical; Because they are deeply rooted, they are difficult to uproot, and if the taproot breaks near the tip, the part that remains in the ground will often sprout again, so the taproot is severed at least a few inches below the ground for effective control must become.

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External links

Wikimedia Commons has media too Taproots .