There are some 200 different types of synthetic and natural cytokinins and most of them are usually developed in the meristem of the roots. The cytokinins are grouped into three categories: the isoprenoid cytokinins, exemplified by Z and iP, are the most abundant type; the naturally occurring adenine derivatives with aromatic substituents, the topolins, are considered less abundant; and the highly active, synthetic diphenylureas, such as CPPU (4-chlorfenuron), are the third category. Functions of Cytokinins. Cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. It is the name of an area of tissue in the plant that promotes cell division actively. Naturally occurring cytokinins are adenine derivatives with isoprenoid side chains attached to the N 6 position of the adenine ring. These hormones mostly found in all the complex plants, bacteria, mosses, and fungi. Cytokinins are present in most plant tissues. Cytokinins and auxins are common hormones used in plant tissue culture, and the ratios of these two groups of plant hormones affect most major growth periods during a plant’s lifetime. Answer. It also delays the destruction of chlorophyll and protein. D. Lateral buds. Cytokinins are mostly produced in. Also Read: Cytokinins. A. Break bud and seed dormancy. Cytokinin is a plant hormone. Use of cytokinins has had wide application in the horticultural industry because cytokinins are used in: A. tissue cultures B. fruit production C. stem elongation D. flower maturation E. root development. Most cytokinins are produced in the meristem of the roots. Shoot apex. BIOSYNTHESIS CYTOKININS Generated mostly in the root apical meristems but also found in: Root cap cells Ovules Phloem cells Leaf axils Tips of young inflorescences Fruit Seeds 10. Meristem is the name for a region of tissue within the plant that actively promotes cell division. Which system carries cytokinins produced in the roots to the rest of the plant? The most common form of naturally occurring cytokinin in plants is zeatin, but many other natural cytokinins have been isolated, including dihydrozeatin, isopentenyladenine, or benzyladenine. MEDIUM. They help in overcoming apical dominance and delay ageing of leaves. It is mostly produced in the root apex. The biosynthesis and metabolism of cytokinins. These are produced in the regions where cell division occurs; mostly in the roots and shoots. Play this game to review Biology. Cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. Cytokinins. It promotes cell division. A. Gibberellins were discovered as a result of: A. extractions of this hormone from plants Cytokinins counter the apical dominance induced by auxins; the two hormones in conjunction with ethylene promote abscission of leaves, flower parts, and fruits. Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. Almost all organisms make cytokinins; for example, isopentenyl adenine derivatives are found adjacent to the anticodon loop of a subset of tRNAs in most eukaryotes and bacteria (Persson et al., 1994). A. Vascular system B. Dermal system C. Reproductive system D. None of these In plants, cytokinins are mostly present as glycosides in plants, and their glycosylation modifications are catalyzed by family 1 glycosyltransferases. Cytokinins are one of the five major hormones families in plants and are important for their normal growth and environmental adaptability. B. Root apex. C. Young leaves. cytokinins are iP-type andtZ-type cytokinins, and the first steps of their biosynthesis are catalyzed by ATP/ADP isopentenyl-transferases (ATP/ADP IPTs) (inArabidopsis, AtIPT1, AtIPT3, AtIPT4, AtIPT5, AtIPT6, AtIPT7, and AtIPT8) (13). They help in the production of new leaves, lateral shoot growth, chloroplasts in leaves etc. It shows delay of senescence in leaves. Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. Which system carries cytokinins produced in the roots to the rest of the plant? Current research on cytokinin glycosylation has focused on the biochemical identification of enzymes …