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Both Growth and Differentiation in Higher Plants Are Open - Biology

Both growth and differentiation in higher plants are open’. Comment.

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Solution 1

Plant growth is generally indeterminate. Higher plants possess specific areas called meristems which take part in the formation of new cells. The body of plants is built on a modular fashion where structure is never complete because the tips (with apical meristem) “are open ended – always growing and forming new organs to replace the older or senescent ones. Growth is invariably associated with differentiation. The exact trigger for differentiation is also not known. Not only the growth of plants are open- ended, their differentiation is also open. The same apical meristem cells give rise to different types of cells at maturity, e.g., xylem, phloem, parenchyma, sclerenchyma fibres, collenchyma, etc. Thus, both the processes are indeterminate, unlimited and develop into
different structures at maturity i.e., both are open.

Solution 2

Growth and development in higher plants is referred to as being open. This is because various meristems, having the capacity for continuously dividing and producing new cells, are present at different locations in these plant bodies.

Concept: Differentiation, Dedifferentiation and Redifferentiation
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NCERT Class 11 Biology Textbook
Chapter 15 Plant Growth and Development
Q 7 | Page 254
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