An angiosperm is a flower-producing plant. The angiosperms, also known as flowering plants, are one of the most important groups of plants that produce seeds. The term angiosperm is derived from two Greek words: angeion, which means “vessel,” and sperma, which means “seed.”

Angiosperms are one of the most diverse and largest extant plant groups in the universe. Angiosperms are classified into 453 families, each of which contains approximately 260,000 living species. Furthermore, angiosperms account for roughly 80% of all known green plants on the planet (Manjunatha et al., 2019). It is well established that angiosperms are vascular seed plants in which an egg is fertilised and develops into a seed in an enclosed hollow ovary.

What is the difference between angiosperms and gymnosperms?

What are the Features of angiosperms?

• The sporophyte, which is the dominant plant throughout the life cycle, is divided into roots, stems, and leaves.

• The highest level of vascular system perfection, with true vessels in the xylem and companion cells in the phloem.

• The arrangement of microsporophylls (stamens) and megasporophylls (carpels) into a structure known as the flower, which is unique to angiosperms.

• Microsporangia (pollen sacs) per microsporophyll (stamen).

• The ovules are always enclosed in an ovary, which is the megasporophyll’s basal region.

• Microspores (pollen grains) and megaspores are produced. As a result, angiosperms are heterosporous.

• The presence of a single functional megaspore that is retained indefinitely within the nucellus or mega-sporangium

• Flower adaptation to insect pollination.

• Pollination is the transfer of pollen grains from the anther to the stigma.
• Spore dimorphism has resulted in the production of male and female gametophytes.

Examples of angiosperms

Fruit trees such as Mango, Apple, Banana, Peach, Cherry, Orange, and Pear frequently show flowers before bearing fruits, and pollination is typically carried out by agents such as bees.

Angiosperms include grains such as rice, corn, and wheat. The wind is responsible for pollination in these plants. Roses, broccoli, kale, petunias, eggplant, tomato, peppers, and sugarcane are all Angiosperms.

The basic structure of angiosperms

While flowers are the reproductive organ, roots, stems, and leaves are non-sexually reproducing body parts. Root systems and shoot systems are the two main components of the angiosperm structure. The shoot system refers to the part of the plant that is above the soil, whereas the root system refers to the part of the plant that is below the soil. The roots are part of the root system, whereas the leaves and stems are part of the plant’s shoot system.

Origins of flowers morphology

Flowering plants (angiosperms) are a subgroup of seed plants (spermatophytes). Extant angiosperms are viewed as a relatively young diversification, the “crown group” of an older clade, the “stem group” angiophytes, with no well-established fossils and no surviving branches other than angiosperms (Doyle and Donoghue, 1993; see also Jefferies, 1979 for definitions of “stem group” and “crown group”). 

The anthophytes, or flowering plants in general, include a few other spermatophytes, such as Bennettitales and Gnetales, in addition to the angiophytes. However, it is unknown whether the anthophytes are monophyletic (Goremykin et al., 1996; Chaw et al.,1997). The angiosperms are made up of a few small relic basal clades as well as the two main clades, monocots and eudicots (APG, 1998). The eudicots are the largest of the angiosperm clades, and within the eudicots, the asteroids are the largest and, in some ways, the most biologically elaborate clade.

Conclusion

The angiosperms, also known as flowering plants, are one of the most important groups of plants that produce seeds. Angiosperms are one of the most diverse and largest extant plant groups in the universe. It is well established that angiosperms are vascular seed plants in which an egg is fertilised and develops into a seed in an enclosed hollow ovary. The two major plant groups are angiosperms and gymnosperms. The arrangement of microsporophylls and megasporophylls into a structure known as the flower, which is unique to angiosperms. Pollination is the transfer of pollen grains from the anther to the stigma.