Development of Vascular Tissue in Angiosperms

Vascular tissue is an important type of tissue in plants that helps in the transportation of water, minerals, and nutrients throughout the plant body. In angiosperms, vascular tissue develops from the meristematic tissue located in the growing tips of the root and stem. The meristematic tissue is responsible for the growth and differentiation of new cells.

Plerome

The plerome is the innermost layer of the meristematic tissue that gives rise to the vascular tissue in angiosperms. It is also known as the procambium. The plerome is responsible for the differentiation of the primary xylem and phloem.

Xylem

The xylem is the vascular tissue responsible for the transportation of water and minerals from the roots to the leaves. It is composed of tracheids, vessel elements, fibers, and parenchyma cells. The tracheids and vessel elements are responsible for the transportation of water and minerals.

Phloem

The phloem is the vascular tissue responsible for the transportation of organic substances from the leaves to the rest of the plant body. It is composed of sieve tube elements, companion cells, fibers, and parenchyma cells. The sieve tube elements are responsible for the transportation of organic substances.

Conclusion

In conclusion, the vascular tissue in angiosperms develops from the plerome, which is the innermost layer of the meristematic tissue. The plerome gives rise to the primary xylem and phloem, which are responsible for the transportation of water, minerals, and organic substances throughout the plant body.

Acc to Histogen theory given by Hanstein
dermatogen forms epideris
periblem forms hypodermis or cortex
plerome forms stele which includes VASCULAR BUNDLES