Question:
In wood anatomical structure, ingrowth into pores are called as _________
In wood anatomical structure, ingrowth into pores are called as _________
Show Hint
Tyloses serve as a diagnostic feature in wood identification labs to distinguish between heartwood and sapwood and to evaluate timber suitability for liquid-tight cooperage.
Updated On: Jul 21, 2026
- Tylosis
- Ring porous woods
- Tracheids
- Fibres
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Wood anatomy focuses on the microscopic structure of secondary xylem. During heartwood formation or in response to injury and drought, specialized anatomical changes occur in vessels.
Step 2: Detailed Explanation:
In many hardwood species, tyloses (singular: tylosis) are balloon-like outgrowths that protrude from adjacent wood parenchyma cells into the lumens of vessels (pores) through pit cavities.
This process occurs when the hydrostatic pressure in a vessel drops as it stops actively conducting water.
The parenchyma cell protoplast expands into the vessel lumen, eventually blocking it completely.
These structures seal the vessels, reducing the wood's permeability and preventing the spread of fungal pathogens and decay.
For example, the abundance of tyloses in White Oak (*Quercus alba*) makes its wood highly impermeable, making it excellent for barrel manufacturing, whereas Red Oak lacks tyloses and is highly permeable.
Step 3: Final Answer:
The ingrowths into pores/vessels are called tyloses, corresponding to option (A).
Wood anatomy focuses on the microscopic structure of secondary xylem. During heartwood formation or in response to injury and drought, specialized anatomical changes occur in vessels.
Step 2: Detailed Explanation:
In many hardwood species, tyloses (singular: tylosis) are balloon-like outgrowths that protrude from adjacent wood parenchyma cells into the lumens of vessels (pores) through pit cavities.
This process occurs when the hydrostatic pressure in a vessel drops as it stops actively conducting water.
The parenchyma cell protoplast expands into the vessel lumen, eventually blocking it completely.
These structures seal the vessels, reducing the wood's permeability and preventing the spread of fungal pathogens and decay.
For example, the abundance of tyloses in White Oak (*Quercus alba*) makes its wood highly impermeable, making it excellent for barrel manufacturing, whereas Red Oak lacks tyloses and is highly permeable.
Step 3: Final Answer:
The ingrowths into pores/vessels are called tyloses, corresponding to option (A).
Was this answer helpful?
0
0
Top ICAR AIEEA Forestry Agroforestry Silviculture Questions
- Read the following statements of silvicultural system followed in tree species and choose the correct answer from the following options:
Statement (I): Anogeissus latifolia is worked only as a component species of mixed forests as coppice-with-standards.
Statement (II): Terminalia arjuna tree is not a regular component of forest stand and is usually worked under selection and coppice with standards.
Choose the correct answer from the options given below: - The most important single factor affecting natural regeneration of Shorea robusta is the time lag between the falling of seed and the commencement of the ________.
- Read the following statements and choose the correct answer about silvicultural system/s adopted for the management of Shorea robusta:
Statement (I): Under clear felling system, a rotation age is fixed and the entire area clear felled and the crop is of uniform age.
Statement (II): Selection system is adopted for areas which are badly eroded and where regeneration is problem and regeneration is obtained by natural means, which may be supplemented by planting.
Statement (III): In coppice with standards system, a few standards are retained and the other trees above the exploitable diameter are clear felled and regeneration is obtained by means of coppice.
Choose the correct answer from the options given below: - Which of the following type of soil is the best for plant growth?
- A biosphere reserve conserves and preserves the following variety of life and choose the correct option of variety of life:
(A). Wild animals
(B). Wild land
(C). Natural vegetation
Choose the correct answer from the options given below:
View More Questions
Top ICAR AIEEA Wood Science Questions
- Terminalia elliptica can be easily identified based on ________ character.
- Ring porous wood is found in ________.
- Which one of the following species is called Bad Fuel Woods?
- Wood of ________ is known as very elastic woods.
- Conduction in hard woods is performed by ________.
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions