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.
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Histogen theory explains both root and shoot apical meristem.
In the korper the initial cell first divides by transverse partition and forms two cells. In root with dermatocalyptrogen the cap extends into protoderm. The apical meristem korpdr the root is sub- terminal in position as the root cap remains terminal. In this type, three groups of initials are found at the apex — outer dermatogenmiddle periblemand inner plerome.
Equisetum, Adiantum and Polypodium etc. The initial cell divides transversely.
korper kappe theory Archives – Botany Studies
This is a question and answer forum for students, teachers and general visitors for kapps articles, answers and notes. The histogens are called dermatogen, periblem and plerome that respectfully form epidermis, cortex and vascular cylinder that are present in a mature root. In the kappe the initial cell first divides transversely and forms two cells. The two cells thus formed one has the capability of cell division.
This cell divides longitudinally and both the daughter cells inherit the property of cell division. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top. This occurs in downwardly pointed roots.
This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. Ontogeny of Stoma in Plants Plants.
When such division continues it is observed that a single rowed region is left behind over the double-rowed region. The thekry part of root cap is the columella where the cells are arranged in longitudinal files. According to Hanstein root apical meristem consists of three cell-initiating regions called histogens Fig.
It divides longitudinally and the two daughter cells thus formed have the potentiality of cell division. The daughter cells are parallel in arrangement, share a common wall and divide by transverse partition followed by longitudinal partition in one cell.
One of the layers gives rise to the stele and the other to the cortex and root cap. It is similar to the tunica-corpus theory of the shoot apex.
The Korper-Kappe Theory of Root Apex | Essay | Botany
In Zea mays monocot dermatogen generates root cap only and this histogen is referred to as calyptrogen. The body-cap concept is illustrated below on analyzing the divisions in the derivatives of apical cell Fig.
This happens due to cell divisions that occur in such a way that a single longitudinal file of cells becomes double files. Continuous T-divisions result in the formation of double-rowed region over a single rowed region.
These cells seldom divide.
Such divisions are described as T-divisions. The following points highlight the top three theories of root apical meristem in plants.
The cells of this region divide first horizontally. For that reason the root apex shows no change in morphology. The theory was put forward by Schuepp A single apical cell is present only in vascular cryptogams, e. The zones exhibit clear boundary when they originate from separate initials, e. It consists of conspicuous longitudinal files of cells. What modification is needed in the statement?
Top 3 Theories of Root Apical Meristem in Plants | Botany
This theory of root meristem was proposed in by Schiiepp who regarded the occurrence of two systems of cell theoru that characterize the root apex with reference to planes of cell division in its parts. The derivatives of dermatogen vary. Here’s how it works: The two cells thus formed have the capability of cell division. Anticlinal division is the characteristic of tunica whereas corpus exhibits both anticlinal and periclinal division.
The second type is very rare and found in Allium sativum, Aloe vera, Amaryllis, Eucharis etc.