Which angiosperm plant does not have a root

Kingdom of Plantae

Kingdom of Plantaebegan to evolve more than 500 million years ago. At that time the planet was very different from the one we know today. In fact, it was so different that we couldn't have survived as it was common for asteroids and comets to hit Earth on a daily basis.

So much so that the first plant life arose in the seas. First, it was cells that gave shape to ever more complex organisms: like mosses. Later the first plants would appear, coming up from the surface, and later the terrestrial ones would.

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What is the Plantae Kingdom?

In the broadest sense The Plantae Kingdom is that of all living things whose functions include photosynthesis;; That is, they convert the energy from the sun and oxygen into sugars, which are their food. In addition to the plants themselves, algae also belong to this kingdom. In fact, there would be no plant today if there were no algae. You are your direct ancestor; the first to colonize the planet.

Now it is also important to say that unlike animals There is no living being in the Kingdom of Plantae that can walk. Wherever it sprouts, it's normal for it to stay there forever. Another completely different thing is the ability to climb, something that types like that Parthenocissus tricuspidata (virgin vine) or the Clematis vitalba (Clematis).

Classification of the Kingdom of Plantae

There are an estimated 323,674 species of organisms belonging to this great kingdom, distributed as follows:

Plants without a flower

  • Rhodophyta: These are red algae, aquatic organisms that occurred in the Mesoproterozoic (about 1600 million years ago). They are capable of photosynthesis because they have chlorophyll. There are about 7000 species.
    Examples: Laurencia, Chondrus crispus.
  • Chlorophyta: Green algae inhabit both fresh and salt water. There are some that even form lichen. There are an estimated 4242.
    Examples: Pediastrum, Ulva.
  • Bryophyta: They are mosses, very primitive land plants that live in shady and humid areas. They have leaves and stems, but no roots, if not rhizoids, thanks to which they absorb water and nutrients from the soil. There are about 24 thousand.
    Examples: Conocephalum.
  • Pteridophyta: Ferns and the like. They are plants that live near humid areas, are often protected from the sun, and produce spores on the leaves. There are about 12 thousand species. Examples: Blechnum Gibbum, Asplenium nidus.

Blooming plants

  • Gymnospermae: Gymnosperms (conifers, ginkgo) are those that have no flowers or fruits themselves and whose pollination also depends on the wind. There are about 1052. More information.
  • Angiosperms: are the flowering plants and those with real fruits. Though the most modern, they are also the most numerous, with 280,000 species. More information.

How are plants classified in the Kingdom of Plantae?

If we focus exclusively on plants and omit algae and mosses, they will be divided into gymnosperms, which have no showy flowers. and angiosperms that do.

Gymnosperm plants

It's a series of Vascular plants that produce seeds, but these are "naked";; That is, they are not formed from a closed ovary and therefore have nothing to protect them. The flower is actually a branch that produces fertile leaves, also called sporophylls. Since the seed is exposed, these plants do not have real fruits.

They appeared during the Mesozoic Era more than 250 million years ago and haven't changed much since then. This includes cycads, conifers, gnetids (such as Welwitschia mirabilis) and a tree that Ginkgo biloba.

Examples

It is estimated that there are 15 botanical families with about 80 botanical genera and about 820 species, some of which are the following:

A. auracana
Image - Flickr / Brewing Books
Image - Wikimedia / GPodkolzin

  • Araucaria auracana: It is an endemic conifer of the Argentine Patagonia. It reaches a height of 50 meters and has a straight, cylindrical trunk. The branches sprout from several meters high, and needle-shaped leaves that end in a point emerge from them. See data sheet.
  • Cycas revoluta: It is a plant that grows in Asia, especially in the east. It has a false trunk from which a crown of pinnate and leathery leaves sprouts every year. The inflorescence, which can be female or male, arises from the center. The first is round and compact, the other is long and narrow. See data sheet.
  • Pine trees: It is the stone pine native to the Mediterranean region. It develops a tall trunk of 50 meters or more with an irregular crown made up of needle-shaped leaves. See data sheet.

Angiosperm plants

Angiosperms are plants that have flowers and also protect their seeds. They appeared about 145 million years ago during the Cretaceous Period and continue to evolve to this day. They create relationships with other animals, making them their pollinators, and therefore those who are most successful at producing fruit with seeds.

You are the most successful. Not only have they managed to conquer much of the world, but they are the ones that we use the most when designing gardens. The enormous variety of angiosperms present - it is estimated that there are around 257 different species - makes this possible. In addition, two types of angiosperms can be distinguished:

  • Monocot: are those whose seeds have only a single cotyledon. This means that when germinating, only a single primitive leaf will sprout, which has parallel veins. Its roots are random and it produces flowers with three or a multiple of three petals. Examples: herbs, including palm trees.
  • Dicot: They are plants with two cotyledons in the seeds that have two leaves when they germinate. The veins of the leaves also have a reticular distribution.

Examples


  • Phoenix dactylifera: is the date palm. Native to Southwest Asia, it develops one or more stems up to 30 meters in height, crowned by bluish-green pinnate leaves. See data sheet.
  • tulip: The tulip is a bulbous plant that blooms in spring and is dormant the rest of the year. It is originally from India, although the Netherlands is one of the main producers. See data sheet.
  • Wisteria sinensis: Wisteria is a deciduous climbing shrub endemic to China. It can reach a height of 30 meters and has light green pinnate leaves. The flower clusters appear in spring and are purple. See data sheet.

What is the significance of the Kingdom of Plantae?

Plants, algae and mosses are very important to other living things for the following reasons:

  • They are the main source of oxygen: Phytoplankton, which is made up of algae, produce 50% of all oxygen on the planet.
  • They absorb carbon dioxide: They absorb CO2 through photosynthesis and thus contribute to improving air quality.
  • They play an important role in various ecological cycles: such as nitrogen. There are many plants like legumes that fix nitrogen in the soil. Thanks to this, other species can grow.
  • They have many uses for animals, including humans: Trees, for example, are a very good refuge in summer because their leaves protect from the sun; Many are suitable for consumption, such as B. lettuce, rice or orange trees. Some of the wood is used or for health benefits.

What do you think about this topic? If you need more information, click here to find out what types of plants there are:

How many species of plants are there in the world?