KORPER KAPPE THEORY PDF
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.
|Published (Last):||13 October 2016|
|PDF File Size:||12.28 Mb|
|ePub File Size:||15.13 Mb|
|Price:||Free* [*Free Regsitration Required]|
In Brassica dicot dermatogen generates both protoderm and root cap and this histogen is referred to as dermatocalyptrogen. Such divisions are described as T-divisions.
In this type, three groups of initials are found at the apex — outer dermatogenmiddle periblemand inner plerome. The jappe type is found in Zephyranthes sp.
The Korper-Kappe Theory of Root Apex | Essay | Botany
For that reason the root apex shows no change in morphology. 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. The other three sides donate cells to form epidermis, cortex and vascular cylinder. The korper-kappe theory of root apex is comparable with tunica-corpus theory of shoot apex.
In the korper the initial cell first divides by transverse partition and forms two cells. Hanstein in advocated the theory. The epidermis arises from the outermost layer of the cortex. In Zea mays monocot dermatogen generates root cap only and this histogen is referred to as calyptrogen. In root with dermatocalyptrogen the cap extends into protoderm.
This type of division has been found among the members of Gramineae and Fagaceae. In certain members of the families Juglandaceae, Rosaceae, Leguminosae, Tiliaceae etc.
The body-cap concept is illustrated below on analyzing the divisions in the derivatives of apical cell Fig. In other words all tissues that compose a mature root including root cap are the thory of a single apical cell. The histogens are called dermatogen, periblem and plerome that respectfully form epidermis, cortex and vascular cylinder that are present in a korler root. 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 following points highlight the top three theories of root apical meristem in plants. The daughter cell that faces the base of root, i. The third type is found in Haemanthus coccineus.
The initial cell divides transversely. This occurs in downwardly pointed roots. One of the layers gives rise to the stele and the other to the cortex and root cap.
Top 3 Theories of Root Apical Meristem in Plants | Botany
The lower daughter cell then divides longitudinally, i. Apical cell theory is confined to vascular cryptogams only as the root apical meristem of flowering plants does not have a single apical cell. The inner region of the apex is the korper. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes.
This type is found in majority of dicotyledonous plants. Equisetum, Adiantum and Polypodium etc. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top.
In Korper-Kappe theory
The central part of root cap is the columella where the cells are arranged in longitudinal files. Klrper the fourth additional type, there are four rows of initials giving rise to the root cap, the epidermis, the cortex and the stele, independently.
The apical meristem of the root is sub- terminal in position as the root cap remains terminal. In contrast to that of the shoot apex, the apical meristem theort the root apex generates cells not only toward the axis but also away from it to form the root cap. Megasporogenesis and Megagametogenesis in Plants Embryology Biology. The two cells thus formed have the capability of cell division.
korper kappe theory Archives – Botany Studies
The root meristem exhibits multicellular structure. Apical Cell Theory 2. The second type is very rare and found in Allium sativum, Aloe vera, Amaryllis, Eucharis etc.