Question

Parenchyma tissue is capable to divide but then why is it called permanent tissues?? Permanent tissue loose the ability to divide so???

Answer 1

Plant show the differentiation I.e., maturation of permanent tissues from meristematic tissues due to which the former lose the ability to divide and become structurally and functionally mature. But , plants also show another interesting phenomenon , that is the living differentiated cells that by now have lost the capacity not divide regain the capacity of division under certain circumstances. Fully differentiated parenchyma cells giving rise to interfascicular and cork cambium during secondary growth is an example of this phenomenon. And this is called dedifferentiation.