Plant Stem Cell Vs. Callus
Despite that callus exhibits a number of stem cell-like properties for a temporary period and that it has been cultured for useful plant compounds as an alternative source of plant stem cell, callus and plant stem cell are fundamentally different from each other. Callus is similar to plant stem cell in its ability to differentiate, but the two are different in their origin. While plant stem cell exists in the meristematic tissues of plant, callus is obtained as a temporary response to cure wound in somatic cell.
Moreover callus undergoes dedifferentiation as differentiated cells acquire ability to differentiate; but genetic variation is inevitable in the process because the cells consist of somatic undifferentiated cells from an adult subject plant. Unlike true stem cells, callus is heterogeneous. Due to this reason, continuous and stable cell division of callus is difficult. Hence plant stem cell originated from cambium is an immortal cell while callus is a temporary dediffertiated cell obtained from stimulating the somatic cell.
Furthermore, the ability to differentiate and proliferate is different that differences between plant stem cell and callus are prevalent in culture and research. Only plant stem cells embedded in meristems can divide and give rise to cells that differentiate while giving rise to new stem cells. These immortal cells divide infinitely.
Read more about this topic: Plant Stem Cell
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