With respect to these the histogen theory fails. Korper-Kappe Theory The Korper-Kappe theory of root apical organization proposed by Schuepp (, ). Meristems, Tissues, Shoot apex, Root apex, Apical Cell Theory, Shoot. Apical Meristem Histogen Theory, Korper-Kappe Theory, Mantle-Core Theory, Tunica. Plant Anatomy Theories Different theories about plant anatomy and different types of cells playing important role in proper functioning of plant.

Answer Now and help others. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. Apical cell theory is confined to vascular cryptogams only as the root apical meristem of flowering plants does not have a single apical cell.

What modification is needed in the statement? The zones exhibit clear boundary when they originate from separate initials, e. Thus the planes of the two divisions form a T in a median longitudinal section of the root.

The derivatives of dermatogen vary. The daughter cells are parallel in arrangement, share a common wall and divide by transverse partition followed by longitudinal partition in one cell. For that reason the root apex shows no change in morphology. The inner region of the apex is the korper. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top.

This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. It kaope based on differences in the planes of cell division. In Zea mays monocot dermatogen generates korperr cap only and this histogen is referred to as calyptrogen. This type is found in majority of dicotyledonous plants. The cells of this region divide first horizontally.

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It consists of conspicuous longitudinal files of cells. Apical Cell Theory 2. The kalpe concept is illustrated below on analyzing the divisions in the derivatives of apical cell Fig. Megasporogenesis and Megagametogenesis in Plants Embryology Biology.

The two cells thus formed have the capability of oorper division. This theory attributes specific destinies to the derivatives of the three histogens. This theory of root meristem was proposed in by Schiiepp who regarded the occurrence of two systems of cell seriation that characterize the root apex with reference to planes of cell division in its parts.

In the fourth additional type, there korpdr four rows of initials giving rise to the root cap, the epidermis, the cortex and the stele, independently.

Top 3 Theories of Root Apical Meristem in Plants | Botany

The daughter cell thery faces the base of root, i. The theory was put forward by Schuepp In root with dermatocalyptrogen the cap extends into protoderm. The outer region of the root apex is the Kappe. This occurs in downwardly pointed roots.

These cells seldom divide. It is similar teory the tunica-corpus theory of the shoot apex. One of the layers gives rise to the stele and the other to the cortex and root cap. In this type there is a single row of initials which, ultimately, gives rise to various zones of the root including the root cap. The daughter cell that faces the root apex inherits the initial function. In certain members of the families Juglandaceae, Rosaceae, Leguminosae, Tiliaceae etc.

This cell divides longitudinally and both the daughter theoryy inherit the property of cell division. Histogen theory explains both root and shoot apical meristem. The initial cell divides transversely.

Top 3 Theories of Root Apical Meristem in Plants | Botany

The first type is found in Zephyranthes sp. The root apex forms no branches, and no lateral structures like the leaves. This type of division has been found among the members of Gramineae and Fagaceae. In the korper the initial cell first divides by transverse partition and forms two cells.

Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top. It divides longitudinally and the two daughter cells thus formed have the potentiality of cell division.

The other three sides donate cells to form epidermis, cortex and vascular cylinder. ,appe apical initial is tetrahedral in shape and generates root cap from one side. Korper and kappe-these two zones of root are delimited by planes of cell division. The theory says that the cells in the root apex divide in a pattern called T-divisions.

In Brassica dicot dermatogen generates both protoderm and tneory cap and this histogen is referred to as dermatocalyptrogen. The body-cap concept and tunica-corpus concept both are based solely on the planes of cell division.

In this type, generally two rows of initials are observed at the apex. According to Hanstein root apical meristem consists of three cell-initiating regions called histogens Fig.

This happens due to cell divisions that occur in such a way that a single longitudinal file of cells becomes double files.

Such divisions are described as T-divisions.