Geometric growth rate: This growth occurs in many higher plants and plant organs and is measured in size or weight. In plant growth, geometric cell division results if all cells of an organism or tissue are active mitotically.
eg: Round three in the given figure, produces 8 cells as 23 – 8 and after round 20 there are 220 = 1,048,576 cells. The large plant or animal parts are produced this way. In fact, it is common in animals but rare in plants except when they are young and small. Exponential growth curve can be expressed as,
W1 = W0 ert
W0 = Initial size at the beginning of the period
r = Growth rate
t = Tittle of growth
e = Base of the natural logarithms
Here V is the relative growth rate and also a measure of the ability of the plant to produce new plant material, referred to as efficiency index. Hence, the final size of W1 depends on the initial size W0.
