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Nutrition and the quiescent centre of root meristems

✍ Scribed by F. A. L. Clowes

Publisher
Springer-Verlag
Year
1970
Tongue
English
Weight
529 KB
Volume
90
Category
Article
ISSN
0032-0935

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✦ Synopsis

Root apices were fed with tritiated thymidine from the endosperm and from labelled root caps placed on decapped roots. Supply from both sources reaches the meristem, but is attenuated by the demand of the dividing cells. The thymidine reaches the far sides of the quiescent centre from both directions. Starvation is thus unlikely to be the reason for the existence of the quiescent centre although cessation of mitosis in the normally meristematic regions may stimulate the quiescent centre by releasing nutrients.

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Modelling Complex Populations Formed by
Modelling Complex Populations Formed by Proliferating, Quiescent and Quasi-quiescent Cells: Application to Plant Root Meristems
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A proliferating population of cells may be considered complex when its proliferative or growth fraction P is lower than 1 and/or when it is formed by subpopulations with different mean cycle times. The present paper shows that in such complex populations exponential growth is consistent with a stead