Again, mathematical modeling combined with observations of plant tissue helped to define the different zones in the meristem that respond to diverse mechanical stimuli. 1096) tested physical effects acting on the shoot apical meristem of growing tomato shoots that alter turgor pressure. Although these developmental events are under hormonal control, they also seem to be constrained by the physical properties of the meristem. New leaves make their first appearance as bulges at the side of the dome-shaped meristem. The meristem at the growing tip of plants is home to stem cells and is the source of newly differentiating shoots and leaves. Varying the values of parameters in their model produced outputs of different leaf shapes ranging from obcordate, ovate, and oval to elliptic, and offered predictions for genes that regulate the developmental process. The WUSCLV paradigm provides a mechanism by which a meristem. The position of l1 is determined by the positions of the previously formed leaf primordia, in this example P1 and P2 (green). 1092) to track and model the trajectory of leaf growth under a variety of perturbations. The shoot apical meristem consists of a population of cells that functions to maintain itself and, at periodic intervals, to generate a new organ (a leaf primordium) from its lateral boundary (). At periodic intervals (termed plastochron), meristem tissue becomes determined to form a leaf primordium at a site termed incipient primordium1 (l1 mauve).
#GENERATION OF A LEAF FROM LEAF PRIMORDIA INVOLVES FREE#
Arabidopsis leaves are free of the cell migrations that complicate animal development, and thus allowed Kuchen et al. Although orthogonal signaling systems seem to direct various developmental processes, few tissues remain in the same shape as they are at initiation to that of the final form.
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