Secretory Tissues
As the name indicates these tissues are related to the secretion of substances such as gums, raisins, latex, nectar, etc. The secretory tissues are of two types that are as follows:
- Laticiferous Tissues: They are long, elongated, thickened, and multi-nucleated cells and contains a yellowish substance called latex. When laticifers are damaged, they release latex, which can have protective, defensive, or healing functions for the plant. Its function range from deterring herbivores to healing wounds. They are spread over the parenchyma cells of plants.
- Glandular Tissues: These tissues contain glands that secrete various essential products like essential oils, mucilage (in betel leaf), gum, resin, tannin, digestive enzymes, etc. Glandular tissues are commonly found in structures such as flower petals, leaves, and stems. The secretions they produce can serve various purposes, including attracting pollinators, deterring herbivores, or aiding in wound healing.
Permanent Tissues – Diagram, Types Notes Biology Class 9
Permanent tissues are a type of plant tissue that has completed its growth and differentiation. They remain in a specialized state throughout the plant’s life. These tissues perform specific functions and are responsible for the overall structural growth and function of the plant. There are three main types of permanent tissues in plants: Parenchyma, Collenchyma, and Sclerenchyma.
Table of Content
- What is Permanent Tissue?
- Types of Permanet Tissue
- Simple Permanent Tissue
- Difference Between Parenchyma, Collenchyma, and Sclerenchyma
- Complex Permanent Tissue
- Secretory Tissues
- FAQs on Permanent Tissues
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