The pattern of growth (velocity field) in the intercalary growth zones of monocotyledon leaves can be determined from patterns of cell number density (number per unit length of cell file) and leaf elongation rates using theory based on a cell number conservation equation. The case where elongation rate is non-steady while the pattern of cell number density is steady is discussed and a method for extending calculations into the meristem using observations of numbers of mitotic cells is outlined. Application of these methods is illustrated using data for epidermal cells in the first leaf of Asphodelus tenuifolius Cav. During early leaf development, leaf elongation rate increased exponentially but cell number density and mitotic number density were steady. Cells 0.1 mm from the base of the leaf when leaves were 3.2 mm long took 8.3 d to move through the growth zone. In leaves that were 4 d older, similar cells took 5.1 d to traverse the growth zone. Increases in the rates of leaf elongation and of cell movement appeared to be associated mainly with increases in total rates of cell production in the epidermal meristem. © 1991 Annals of Botany Company.
CITATION STYLE
Gandar, P. W., & Rasmussen, H. (1991). Growth pattern and movement of epidermal cells within leaves of Asphodelus tenuifolius Cav. Annals of Botany, 68(4), 307–315. https://doi.org/10.1093/oxfordjournals.aob.a088257
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