Question

Conjunctive tissue is found in the mature stem of
(A) Mirabilis Jalapa
(B) Peperomia pellucida
(C) Boerhaavia
(D) Tinospora cordifolia

Answer 1

Hint: Conjunctive tissue is defined as the tissue which is either parenchyma or sclerenchyma in origin. This tissue is present between the bundles of the xylem and the phloem tissues in the vascular bundles of the root. This is present in both dicot and monocot root.

Complete step by step answer:
In the dicot stem, it is involved in the formation of the cambium. Cambium is the layer of the
tissue which has the undifferentiated growth which is partially differentiated for the purpose of plant growth. This forms the parallel rows of cells between the xylem and the phloem which in the future develop into the secondary tissues. Boerhavia diffusa is the one of the flowering plants. It is also known as punarnava.
Parenchyma cells present in the middle of xylem and phloem which transfer water and food respectively is called conjunctive tissue. It doesn't become meristematic at any formative stage in monocot. In the dicot plants like Boerhavia, the conjunctive tissue is condensed in the interfascicular locale and it becomes meristematic and brings about secondary tissue development. Hence the conjunctive tissue is found in the mature stem of the boerhaavia.

Hence the correct answer is option(C)

Note: In monocot root, these conjunctive tissues are present in the central portion of the root and are made up of the thin walled parenchymatic cells with the larger intercellular space between them. They possess the large pith and are well developed.