Question

A tissue for conduction of water and food in the leaves of Pinus is:

• A. Trabecular tissue
• B. Conducting tissue
• C. Transfusion tissue
• D. All of these

Answer 1

The correct option is C Transfusion tissue

The tissue immediately surrounding at least part of the vascular bundles in the leaves of gymnosperms, e.g. Pinus is called transfusion tissue. Transfusion tissue is composed of tracheids (transfusion tracheids) with conspicuous bordered pits and parenchyma cells (transfusion parenchyma) containing tannin-like substances and sometimes starch. The main function of the transfusion tissue is believed to be the transport of materials between the vascular bundles and the mesophyll.