Meristematic tissue

Amanda Robb Amanda has taught high school science for over 10 years. She has a Master's Degree in Cellular and Molecular Physiology from Tufts Medical School and a Master's of Teaching from Simmons College. She is also certified in secondary special education, biology, and physics in Massachusetts. • Instructor A meristem is a collection of undifferentiated cells that can divide and become other specialized types of cells in the plant. Meristem tissue is important because it allows for plants to grow and repair damaged tissue. For example, the buds on the ends of leaves are the product of the meristem. This allows for plants to push new growth. There are different types of meristems, called meristematic tissue. What Is Meristematic Tissue? Think for a moment about a new, unprogrammed computer. It's a blank slate--it can potentially run any program. But once you install an operating system, all that changes. Now, the computer can only execute programs compatible with that system. Meristematic tissue is like an unprogrammed computer--it is made of cells that haven't been assigned a role within the plant, or undifferentiated cells. These cells could do or be anything, just like that blank computer. Once a cell's role is assigned though (just like when the computer is programmed), its function becomes limited. The main function of meristematic cells is to create new growth for the plant. Meristematic tissue is the collection of meristematic cells in a plant. Meristematic cells...

• Cells within the meristematic tissues are self-renewing, so that each time they divide, one cell remains identical to the parent while the other can specialize and become part of another plant structure. The meristematic tissue is therefore self-sustaining. • While other plant tissues can be made of both living and dead cells, the meristematic cells are all living and contain a large ratio of dense liquid. • When a plant is injured, it is the undifferentiated meristematic cells that are responsible for healing the wounds through the process of becoming specialized. The apical meristematic tissues are also known as "primary meristematic tissues," because these are what form the main body of the plant, allowing for vertical growth of stems, shoots, and roots. The primary meristem is what sends a plant's shoots reaching for the sky and the roots burrowing into the soil. Gall-making insects oviposit (lay their eggs ) or feed on the meristematic tissues of host plants at critical moments. A gall-making wasp, for example, may lay eggs in plant tissues just as leaves are opening or shoots are lengthening. By interacting with the plant's meristematic tissue, the insect takes advantage of a period of active cell division to initiate the formation of a gall. The walls of the gall structure are very strong, providing protection for the larvae feeding on plant tissues within. Galls can also be caused by bacteria or viruses infecting the meristematic tissues. Galls may be unsightly, ...

Plants show indefinite growth. But why does a plant show indefinite growth? Which kind of tissue is present in the root and shoot apices of a plant? The answer to all these questions is meristematic tissue. The plant body is made up of various kinds of tissues that can be broadly classified into two main types, i.e., meristematic tissues and permanent tissues. The meristematic tissues are undifferentiated cells that undergo rapid cell division to form new cells, which, when differentiated, give rise to permanent tissues. In this article, we will provide detailed information about meristematic tissues, their classification, characteristics, function, types, etc. Continue to read to find out more! Meristematic Tissues: Definition The word ‘Meristems’ was derived from the Greek word called ‘Meristos’, which means ‘divisible’. Meristematic tissue is defined as an undifferentiated mass of cells that are totipotent and undergoes continuous cell division. They are mainly responsible for indefinite growth and tissue repair in a plant body. The cells of these tissues retain the power of cell division. Figure: T.S. of Meristematic Tissue Also, check about Plant Tissues Meristematic Tissue Characteristics The characteristics of meristematic tissues are as follows: • They are living and contain an undifferentiated mass of rapidly dividing cells. • The tissue is made up of cells that show totipotency. • The shape of cells is spherical, polygonal or rectangular. • Cells remain perpetual...

Learning Objectives • Describe the difference between meristematic and non-meristematic tissues. • Compare and contrast dermal, ground, and vascular tissue. Plants are multicellular eukaryotes with tissue systems made of various cell types that carry out specific functions. Plant tissues are composed of cells that are similar and perform a specific function. Together, tissue types combine to form organs. Each organ itself is also specific for a particular function. Plant tissue systems fall into one of two general types: meristematic tissue, and permanent (or non-meristematic) tissue. Cells of the meristematic tissue are found in meristems, which are plant regions of continuous cell division and growth. Meristematic tissue cells are either undifferentiated or incompletely differentiated, and they continue to divide and contribute to the growth of the plant. In contrast, permanent tissue consists of plant cells that are no longer actively dividing. Meristematic tissues consist of three types, based on their location in the plant. Apical meristems contain meristematic tissue located at the tips of stems and roots, which enable a plant to extend in length. Lateral meristems facilitate growth in thickness or girth in a maturing plant. Intercalary meristems occur only in monocots, at the bases of leaf blades and at nodes (the areas where leaves attach to a stem). This tissue enables the monocot leaf blade to increase in length from the leaf base; for example, it allows lawn gra...

• Afrikaans • العربية • Aragonés • Asturianu • বাংলা • Български • Bosanski • Català • Čeština • Deutsch • Eesti • Ελληνικά • Español • Esperanto • Euskara • فارسی • Français • Gaeilge • Galego • 한국어 • Հայերեն • हिन्दी • Ido • Bahasa Indonesia • Italiano • עברית • Jawa • ქართული • Кыргызча • Latina • Latviešu • Lietuvių • Македонски • മലയാളം • Bahasa Melayu • Nederlands • 日本語 • Oʻzbekcha / ўзбекча • ਪੰਜਾਬੀ • Polski • Português • Română • Русский • Simple English • Slovenščina • Српски / srpski • Sunda • Suomi • Svenska • தமிழ் • ไทย • Türkçe • Українська • Tiếng Việt • 吴语 • 粵語 • 中文 Tunica-corpus model of the apical meristem (growing tip). The epidermal (L1) and subepidermal (L2) layers form the outer layers called the The meristem is a type of meristematic cells) capable of The term meristem was first used in 1858 by Beiträge zur Wissenschaftlichen Botanik ("Contributions to Scientific Botany"). merizein (μερίζειν), meaning to divide, in recognition of its inherent function. [ citation needed] There are three types of meristematic tissues: apical (at the tips), intercalary or basal (in the middle), and lateral (at the sides). At the meristem summit, there is a small group of slowly dividing cells, which is commonly called the central zone. Cells of this zone have a stem cell function and are essential for meristem maintenance. The proliferation and growth rates at the meristem summit usually differ considerably from those at the periphery. Apical meristems [ ] Apical meris...

\( \newcommand\) • • • • • Learning Objectives • Discuss the attributes of meristem tissue and its role in plant development and growth The adult body of vascular plants is the result of meristematic activity. Plant meristems are centers of mitotic cell division, and are composed of a group of undifferentiated self-renewing stem cells from which most plant structures arise. Meristematic cells are also responsible for keeping the plant growing. The Shoot Apical Meristem (SAM) gives rise to organs like the leaves and flowers, while the Root Apical Meristem (RAM) provides the meristematic cells for the future root growth. The cells of the shoot and root apical meristems divide rapidly and are considered to be indeterminate, which means that they do not possess any defined end fate. In that sense, the meristematic cells are frequently compared to the stem cells in animals, which have an analogous behavior and function. Meristem tissue and plant development Meristematic tissues are cells or group of cells that have the ability to divide. These tissues in a plant consist of small, densely packed cells that can keep dividing to form new cells. Meristematic tissue is characterized by small cells, thin cell walls, large cell nuclei, absent or small vacuoles, and no intercellular spaces. Meristematic tissues are found in many locations, including near the tips of roots and stems (apical meristems), in the buds and nodes of stems, in the cambium between the xylem and phloem in dicoty...

The term meristem was coined by Carl Wilhelm von Nägeli. Meristematic tissues have undifferentiated cells, which form the building blocks of the specialized plant structures. Meristematic tissues have living cells with varied shapes. They possess a large nucleus devoid of the vacuole. The cells have no intercellular space. The place where these cells exist is called Meristem. The cells of the meristematic tissue have the capability of dividing themselves actively to make specialized structures, like buds of leaves and flowers, tips of roots and shoots, etc. These cells help to increase the length and bulkiness of the plant. Characteristics of Meristematic Tissue The characteristics of meristematic tissue are the following: • The cells of these tissues are known as Meristems. • It has the quality of self-renewal as every time the cell divides, one cell remains just like the parent cell and the others form specialized structures. • They have very small and few vacuoles. • The meristematic tissues are living and thin-walled. • The protoplasm of the cells is very dense. • The meristematic tissues heal the injuries of an injured plant. • These cells do not store food. • They exhibit a very high metabolic activity. • They possess a single, large, and prominent nucleus. Types of Meristematic Tissue The meristematic tissue is of the following types: Meristematic Tissue on the Basis of Origin: Promeristem • It is the earliest and youngest meristematic tissue. • It originates from t...

• Cells within the meristematic tissues are self-renewing, so that each time they divide, one cell remains identical to the parent while the other can specialize and become part of another plant structure. The meristematic tissue is therefore self-sustaining. • While other plant tissues can be made of both living and dead cells, the meristematic cells are all living and contain a large ratio of dense liquid. • When a plant is injured, it is the undifferentiated meristematic cells that are responsible for healing the wounds through the process of becoming specialized. The apical meristematic tissues are also known as "primary meristematic tissues," because these are what form the main body of the plant, allowing for vertical growth of stems, shoots, and roots. The primary meristem is what sends a plant's shoots reaching for the sky and the roots burrowing into the soil. Gall-making insects oviposit (lay their eggs ) or feed on the meristematic tissues of host plants at critical moments. A gall-making wasp, for example, may lay eggs in plant tissues just as leaves are opening or shoots are lengthening. By interacting with the plant's meristematic tissue, the insect takes advantage of a period of active cell division to initiate the formation of a gall. The walls of the gall structure are very strong, providing protection for the larvae feeding on plant tissues within. Galls can also be caused by bacteria or viruses infecting the meristematic tissues. Galls may be unsightly, ...

The term meristem was coined by Carl Wilhelm von Nägeli. Meristematic tissues have undifferentiated cells, which form the building blocks of the specialized plant structures. Meristematic tissues have living cells with varied shapes. They possess a large nucleus devoid of the vacuole. The cells have no intercellular space. The place where these cells exist is called Meristem. The cells of the meristematic tissue have the capability of dividing themselves actively to make specialized structures, like buds of leaves and flowers, tips of roots and shoots, etc. These cells help to increase the length and bulkiness of the plant. Characteristics of Meristematic Tissue The characteristics of meristematic tissue are the following: • The cells of these tissues are known as Meristems. • It has the quality of self-renewal as every time the cell divides, one cell remains just like the parent cell and the others form specialized structures. • They have very small and few vacuoles. • The meristematic tissues are living and thin-walled. • The protoplasm of the cells is very dense. • The meristematic tissues heal the injuries of an injured plant. • These cells do not store food. • They exhibit a very high metabolic activity. • They possess a single, large, and prominent nucleus. Types of Meristematic Tissue The meristematic tissue is of the following types: Meristematic Tissue on the Basis of Origin: Promeristem • It is the earliest and youngest meristematic tissue. • It originates from t...

Amanda Robb Amanda has taught high school science for over 10 years. She has a Master's Degree in Cellular and Molecular Physiology from Tufts Medical School and a Master's of Teaching from Simmons College. She is also certified in secondary special education, biology, and physics in Massachusetts. • Instructor A meristem is a collection of undifferentiated cells that can divide and become other specialized types of cells in the plant. Meristem tissue is important because it allows for plants to grow and repair damaged tissue. For example, the buds on the ends of leaves are the product of the meristem. This allows for plants to push new growth. There are different types of meristems, called meristematic tissue. What Is Meristematic Tissue? Think for a moment about a new, unprogrammed computer. It's a blank slate--it can potentially run any program. But once you install an operating system, all that changes. Now, the computer can only execute programs compatible with that system. Meristematic tissue is like an unprogrammed computer--it is made of cells that haven't been assigned a role within the plant, or undifferentiated cells. These cells could do or be anything, just like that blank computer. Once a cell's role is assigned though (just like when the computer is programmed), its function becomes limited. The main function of meristematic cells is to create new growth for the plant. Meristematic tissue is the collection of meristematic cells in a plant. Meristematic cells...