Meristem Tissue Differentiation. The peculiar monocot cambium produces secondary growth that can be considered as a true secondary growth (Fisher, 1973;Fisheretal.,1974;DeMason,1994)because it is the product of divisional activity of a secondary meristem (Tomlinson & Zimmermann, 1969 and earlier workers). Why do plants need secondary growth? There secondary tissues are formed by the two types of lateral meristem i.e. The result of secondary growth is most evident in woody, perennial plants like trees, shrubs and vine. Classification of Meristem The two lateral meristems responsible for secondary growth are (a) phloem and xylem (b) cork cambium and vascular cambium (c) epidermis and periderm (d) primary xylem and secondary xylem (e) … It is so called because it is responsible for secondary growth. a meristem that adds thickness to woody plants involved in secondary growth made up of vascular cambium and cork cambium. - Primary Growth: Cells of apical meristems divide, differentiate and develop to form primary tissues. Growth at the apical meristem increases stem length and at the lateral meristem increases stem girth. The lateral meristematic tissue is a meristematic tissue located on the lateral side of the stems and roots, causing the growth of plant organs in thickness. Secondary growth definition, an increase in the thickness of the shoots and roots of a vascular plant as a result of the formation of new cells in the cambium. The secondary meristems divide and give rise to secondary permanent tissues. The lateral meristematic tissue occurs only in trees, shrubs, and some grasses. Concept 14: Lateral Meristems In woody plants, secondary growth of stems and roots occurs through the activity of two lateral meristems: the vascular cambium and the cork cambium. This type of growth is known as secondary growth because it is growth around an already established stem. Lateral Meristem Function. This is called primary growth. (Vascular cambium is a type of lateral meristem that produces secondary xylem and phloem in a plant.) Secondary thickening with this meristem occurs in a number of monocotyledonous species such as, Xanthorrhoea, Dracaena, (Figs. Remember that all plant stem growth occurs at the meristems of the shoot system because this is where cell division occurs. The vascular cambium is the lateral meristem that produces the secondary vascular tissues. B. What is a lateral meristem and what are its two components? The growth of the lateral meristems, which includes the vascular cambium and the cork cambium (in woody plants), increases the thickness of the stem during secondary growth. Secondary growth refers to the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken, while primary growth is growth that occurs as a result of cell division at the tips of stems and roots, causing them to elongate and gives rise to primary tissue. There are two types of meristem in the plant stem: apical and lateral. Use information in the graphic to answer the questions below it. Secondary growth is characterized by an increase in thickness or girth of the plant, and is caused by cell division in the lateral meristem. The letter A indicates. They can be of primary or secondary origin. Or An increase in plant growth due to the activity of vascular cambium is called secondary growth. secondary meristem. As we just reviewed, primary growth occurs at the apical meristem … Primary growth increases length of the plant as well as lateral appendages. Secondary Growth in Plants. The two important ones for secondary growth are the vascular cambium and the cork cambium. ... * In plants, primary and secondary meristematic cells contribute to primary and secondary growth of the plant. This lesson includes: A review of key components in the shoot system Primary growth is responsible for the increase in the length of the shoot while secondary growth is responsible for the increase of the girth of the plant. Define secondary growth. Secondary (2º) Growth: mitotic growth from a lateral meristem (e.g. Origin and Formation of Vascular Cambium vascular cambium and cork cambium (phellogen). CONTENTS. The herbaceous plants do not undergo secondary growth. See more. It … Other articles where Lateral meristem is discussed: angiosperm: Roots: …they give rise to new lateral meristems and lateral roots. n. Growth in vascular plants from production of secondary tissues by a lateral meristem, usually resulting in wider branches and stems. See more. When the cells of the apical meristem divide, primary growth occurs. While the apical meristem is responsible for vertical growth, the lateral meristem is responsible for lateral growth, or growth in diameter. Herbaceous plants mostly undergo primary growth, with hardly any secondary growth or … In botany, secondary growth is the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken, while primary growth is growth that occurs as a result of cell division at the tips of stems and roots, causing them to elongate, and gives rise to primary tissue. The literature is fraught with synonyms referring (a) to the meristem producing the secondary vascular tissues, e.g. The stem of date palm increases in girth due to the activity of apical meristem and not because of intercalary meristem and lateral meristem (involves is the normal secondary growth of dicots). Q1. synonyms re ferring (a) t o the meristem pr oducing th e secondary va scular tiss ues, e.g. FAQ’s for You. adds layers of vascular tissue called secondary xylem and secondary phloem. Figure 1 shows the areas of primary and secondary growth in a plant. The vascular cambium is located in between the primary xylem and primary phloem. In contrast, when the cells of the lateral meristem divide, secondary growth occurs. The lateral meristems that produce secondary growth are called cambiums, which just means a tissue layer that adds to plant growth. Write four characteristics of meristematic tissue. 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