When a plant undergoes secondary growth what tissue is being replaced?

Figure 4. In woody plants, primary growth is followed by secondary growth, which allows the plant stem to increase in thickness or girth. Secondary vascular tissue is added as the plant grows, as well as a cork layer. The bark of a tree extends from the vascular cambium to the epidermis.

Which tissues result from secondary growth?

There are two types of lateral tissues involved in secondary growth, namely, vascular cambium and cork cambium.

Which tissues are responsible for secondary growth in plants?

cambium, plural Cambiums, orCambia, in plants, layer of actively dividing cells between xylem (wood) and phloem (bast) tissues that is responsible for the secondary growth of stems and roots (secondary growth occurs after the first season and results in increase in thickness).

What happens to the plant when secondary growth occurs?

Arising from lateral meristems, secondary growth increases the width of the plant root or stem, rather than its length. As long as the lateral meristems continue to produce new cells, the stem or root will continue to grow in diameter.

What replaces the epidermis during secondary growth?

During secondary growth, through the increase in girth of plant organs, the periderm replaces the epidermis as the outermost tissue. The phellogen, a bifacial post-embryonic meristem, forms the phelloderm inwards (toward the vasculature) and the suberized phellem outwards (toward the environment).

What is secondary growth in a plant?

Secondary growth is characterized by an increase in thickness or girth of the plant. It is caused by cell division in the lateral meristem. Herbaceous plants mostly undergo primary growth, with little secondary growth or increase in thickness.

What happens to primary xylem in secondary growth?

function in trees



(apical meristems) give rise to primary xylem. In woody plants, secondary xylem constitutes the major part of a mature stem or root and is formed as the plant expands in girth and builds a ring of new xylem around the original primary xylem tissues.

Which of the following tissue is responsible for growth?

Meristematic tissues are responsible for plant growth. They are present at the tips of roots,stem and branches. The cells present in these tissues constantly divide to produce new cells.

Which of the following part is responsible for secondary growth?

So, the correct answer is ‘Vascular cambium‘.

What is cork tissue?

Cork cambium (pl. cambia or cambiums) is a tissue found in many vascular plants as a part of the epidermis. It is one of the many layers of bark, between the cork and primary phloem. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems.

Where is dermal tissue?

The dermal tissue system—the epidermis—is the outer protective layer of the primary plant body (the roots, stems, leaves, flowers, fruits, and seeds).

What is the correct sequence of tissues in a tree that has undergone secondary growth?

The sequence of tissues outlined before are the same from the center outward: pith, primary xylem, secondary xylem, vascular cambium, secondary phloem, primary phloem, cortex, and periderm.

What is the secondary xylem?

In woody plants secondary xylem comprises the bulk of the tissue in the stems and roots. It is the most important supporting tissue in arborescent dicotyledons and most gymnosperms, and the major tissue for the transport of water and essential minerals in woody plants.

What meristem is responsible for secondary growth?

Lateral meristems

Lateral meristems are known as secondary meristems because they are responsible for secondary growth, or increase in stem girth and thickness. Meristems form anew from other cells in injured tissues and are responsible for wound healing.

Which tissue is responsible for growth and development of plant?

Meristematic tissue

So, the correct option is ‘Meristematic tissue‘.

What is secondary growth describe?

Definition of secondary growth



: growth in plants that results from the activity of a cambium producing increase especially in diameter, is mainly responsible for the bulk of the plant body, and supplies protective, supporting, and conducting tissue — compare primary growth.

What is secondary meristem?

Secondary meristem is the meristem formed in the mature region of roots and shoots, etc. E.g. interfascicular cambium and cork-cambium.

What is parenchyma tissue?

Parenchyma tissue is composed of thin-walled cells and makes up the photosynthetic tissue in leaves, the pulp of fruits, and the endosperm of many seeds. Collenchyma cells mainly form supporting tissue and have irregular cell walls. They are found mainly in the cortex of stems and in leaves.

What is xylem tissue?

xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. Xylem tissue consists of a variety of specialized, water-conducting cells known as tracheary elements.

What is mesenchyme tissue?

Mesenchyme is a type of animal tissue comprised of loose cells embedded in a mesh of proteins and fluid, called the extracellular matrix.

What kind of tissue is collenchyma?

Collenchyma is a supporting tissue composed of more or less elongated living cells with unevenly thickened, nonlignified primary walls. It is in regions of primary growth in stems and leaves.

What is sclerenchyma tissue in plants?

sclerenchyma, in plants, support tissue composed of any of various kinds of hard woody cells. Mature sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin.

What is collenchyma and sclerenchyma?

Collenchyma cells are the least common plant cell type. They have a primary cell wall and provide support in herbaceous or temporary organs such as petioles and leaves. Sclerenchyma cells have a lignified and strong secondary cell wall and are usually dead at maturity.

What is epithelial tissue?

What is the epithelium? The epithelium is a type of body tissue that forms the covering on all internal and external surfaces of your body, lines body cavities and hollow organs and is the major tissue in glands.

What does the connective tissue do?

Tissue that supports, protects, and gives structure to other tissues and organs in the body. Connective tissue also stores fat, helps move nutrients and other substances between tissues and organs, and helps repair damaged tissue. Connective tissue is made up of cells, fibers, and a gel-like substance.

What is squamous epithelium tissue?

Simple squamous epithelium is a single thin layer of flattened cells with irregular boundaries. They line the walls of blood vessels and air sacs of lungs. Also, they involve in physiological processes like osmosis and diffusion.