Table of Contents
- 1 What is secondary growth in plants describe various steps of secondary growth in dicot stem with the help of diagrams?
- 2 Why secondary growth does not occur in most Monocot stems?
- 3 What is secondary growth in a plant which types of tissue experience secondary growth?
- 4 What is secondary growth describe the activity of Inter and Intrafascicular cambium in dicotyledonous stem?
- 5 Which of the following secondary growth does not occur?
- 6 In which of the following secondary growth occurs?
- 7 What is secondary growth describe the secondary growth in dicot stem?
- 8 Why does secondary growth occur in dicots only?
- 9 What is the structure of a dicotyledonous stem?
- 10 Do monocot stems have secondary tissues?
What is secondary growth in plants describe various steps of secondary growth in dicot stem with the help of diagrams?
It increases the diameter of the stem. In woody plants, secondary tissues constitute the bulk of the plant. They take part in providing protection, support and conduction of water and nutrients. Secondary tissues are formed by two types of lateral meristems, vascular cambium and cork cambium or phellogen.
Why secondary growth does not occur in most Monocot stems?
Secondary growth is the growth in thickness due to the formation of secondary tissues by lateral meristems. These tissues are formed by meristems, vascular cambium and cork cambium respectively. Secondary growth does not occur in monocots because monocots do not possess vascular cambium in between the vascular bundles.
How does secondary growth occur in dicot root?
The secondary growth in the root takes place due to the formation of secondary tissues by lateral meristems. Most of the dicotyledonous roots show secondary growth in thickness, like that of dicotyledonous stems. It occurs by the reappearance of two types of secondary vascular tissues called the cambium and periderm.
What is secondary growth in a plant which types of tissue experience secondary growth?
In many vascular plants, secondary growth is the result of the activity of the two lateral meristems, the cork cambium and vascular cambium. Arising from lateral meristems, secondary growth increases the width of the plant root or stem, rather than its length.
What is secondary growth describe the activity of Inter and Intrafascicular cambium in dicotyledonous stem?
In a dicotyledonous stem, the primary xylem and primary phloem are separated by cambium cells called intrafascicular cambium. During secondary growth, the medullary rays adjacent to the intrafascicular cambium develop into meristematic tissue and are called interfascicular cambium.
What is secondary growth describe secondary growth in dicot stem?
Secondary growth in the stem increases the diameter of the stem. It takes place in perennial Gymnosperms and Dicot trees, and many shrubs. Secondary growth is the formation of secondary tissues from lateral meristems. In woody plants, secondary tissues constitute the bulk of the plant.
Which of the following secondary growth does not occur?
With few exceptions most of the dicots and gymnosperms show secondary growth. Roots and stems of monocot plants do not show secondary growth (due to absence of vascular cambium), with few exceptions e.g., Dracaena, Yucca, etc., which exhibit anomalous secondary growth.
In which of the following secondary growth occurs?
Solution : Secondary growth takes place in angiosperms because cambium are present (except monocots).
Which of the following events does not occur during secondary growth in dicot roots?
Annual rings does not occur in secondary growth in a typical dicot root.
What is secondary growth describe the secondary growth in dicot stem?
Why does secondary growth occur in dicots only?
So normal secondary growth occurs in dicots only, and it causes increase in thickness both in intrastelar and extrastelar region of roots and stems. Intrastelar secondary growth in dicot stems: In dicotyledonous stem, the vascular bundles are arranged more or less in a ring.
Where does secondary growth occur in plants?
Secondary growth occurs in stem and root of dicots and gymnosperms. However, it is absent in stem and root of monocot and completely absent in leaf. A process of formation of secondary tissues due to activity of vascular cambium and cork cambium for increasing thickness or girth or diameter of plant is termed as secondary growth. i.
What is the structure of a dicotyledonous stem?
In a typical dicotyledonous stem, the secondary growth starts in the intra- and extrastelar regions. The vascular bundles of dicotyledonous stems are collateral and open, and arranged in a ring.
Do monocot stems have secondary tissues?
Secondary tissues are formed by the cambium, which is normally present in dicotyledonous roots and stems. Though some monocot stems possess nonvascular cambia, which produce secondary tissues, it is regarded as anomalous.