FROM CELL-GROWTH TO LEAF GROWTH .2. SIMULATION OF A FILE OF CELLS

Citation
Tj. Arkebauer et Jm. Norman, FROM CELL-GROWTH TO LEAF GROWTH .2. SIMULATION OF A FILE OF CELLS, Agronomy journal, 87(1), 1995, pp. 106-112
Citations number
33
Categorie Soggetti
Agriculture
Journal title
ISSN journal
00021962
Volume
87
Issue
1
Year of publication
1995
Pages
106 - 112
Database
ISI
SICI code
0002-1962(1995)87:1<106:FCTLG.>2.0.ZU;2-2
Abstract
Certain plant parts have cells arranged end to end in more or less dis tinct files (e.g., monocot leaves, roots, filamentous algae). Modeling the growth and development of such files of cells can give us insight s into processes governing cell division and cell expansion. The objec tives of this research were to construct a cell-based model of a growi ng file of cells and to examine the effects of the daughter ratio vs. time function on the growth of the file. The file is considered to be a group of cells along the length of a monocot leaf. Cell expansion is described by water Bus equations. Cell division is determined by a da ughter ratio vs. time function. The daughter ratio is defined as the p roportion of cells that remain proliferative (capable of further divis ion) after each cell division event. Outputs from the model include th e elongation rate of the entire file, the growth rate distribution alo ng the file, and the proliferative fractions for groups of cells along the file. Outputs are compared with field measurements of leaf elonga tion in sorghum [Sorghum bicolor (L.) Moench] plants. The model overes timates the length of the expanding zone compared with the field measu rements. There is close agreement between model outputs and field meas urements of relative growth rates along expanding portions of leaves a nd estimated proliferative fractions of expanding leaves. The effects of using different daughter ratio vs. time functions on model outputs are also examined.