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The Origin Of Adventitious Roots In Coleus, Ethel Belk
The Origin Of Adventitious Roots In Coleus, Ethel Belk
Electronic Theses and Dissertations
It has long been known that adventitious roots develop from shoots and that adventitious shoots develop from roots. This fact is an important one to the horticulturist in propagating plants by stem or, root cuttings. The point of origin of these structures has not been fully presented. There have been various assumptions mad e as to where and how the adventitious structures arise. To avoid confusion, it is best to indicate that adventitious structures are those which are added to the plant; they are not the normal structures of the plant but are superfluous. They are not, however, superfluous for …
Reversal Of Polarity In Some Woody Dicotyledonous Angiosperms, Ida J. Rude
Reversal Of Polarity In Some Woody Dicotyledonous Angiosperms, Ida J. Rude
Electronic Theses and Dissertations
There has for some time existed a theory regarding organized or possibly unorganized formative substances which flow in different directions in the plant tissue and give to the supposedly polarized meristematic tissues of the plant the power to develop to maintain roots from one given or predetermined extremity and shoots from the opposite extremity only. According to theory – in case of the reversal of the position of these ends in relation to moisture, a corresponding reversal in type of plant organ produced will not ensue and persist. The experiment under discussion in this paper was carried out in an …