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Annals of Botany 40: 199-211, 1976
© 1976 Annals of Botany Company

RESEARCH-ARTICLE

Development During Vegetative Growth in the Apical Region of the Shoot of Lupinus albus

N. SUNDERLAND2 and R. BROWN1,3

2John Innes Institute Colney Lane, Norwich
3Botany Department, Edinburgh University, The King's Buildings Mayfield Road, Edinburgh EH9 3JH

1Requests for reprints should be addressed to R.B.

Received: 2 June 1975   

This investigation was designed to show the nature of the development in terms of cell numbers and of rates of division that proceeds in the terminal region of the shoot during the vegetative phase in Lupinus albus. Data are assembled that show that with each successive plastochron in the dome the number of cells increases and the rate of division decreases; in the first internode again the number of cells increases and the rate of division decreases, and in the first primordium both the number of cells and the rate of division decrease. The data also show that with the transition from one plastochron to the next the rate of division in any particular intemnode or primordium decreases. It is a significant feature that all the changes in the system can be characterized through constant numerical factors. The significance of the results is discussed.


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