The internal structure of the root is comparatively simple. There are three concentric layers: 1. The epidermis, 2. The cortex, and 3. The vascular cylinder. 1. The Epidermis: The epidermal cells of the root, which enclose the entire surface of the root, absorb water and minerals from the soil. As you would expect, they lack the cuticle found on the [...]
In this article we will discuss about the stages of secondary growth in dicotyledonous root with the help of suitable diagrams. The roots of some herbaceous dicotyledons and of all gymnosperms and woody dicotyledons show secondary growth in thickness. The tissues of secondary origin in the dicotyledonous roots are basically similar to those of the stem, but the way of [...]
Read this article in Hindi to learn about the modifications of tap-roots, explained with the help of suitable diagrams. कुछ पौधों की मूसला एवं अपस्थानिक जड़ें पौधे के विशेष कार्य के लिए रूपान्तरित हो जाती हैं । उन प्रतिरूपों की पहचान एवं उनके बारे में सामान्य जानकारी यहाँ दी जा रही है । (a) मूसला जड़ों के रूपान्तरण (Modifications of [...]