Botany - Plant Growth and Development Question with Solution | TestHub

Growth pattern of cell, organisms is uniform under favourable conditions & a typical growth curve in plants is sigmoidal. Thus following phases of growth are recognized.

(i) Lag phase: In lag period the growth is slow. It represents formative or cell division phase.

(ii) Log phase: Also called as exponential phase. During this phase growth is maximum & most rapid. It represents cell elongation phase.

(iii) Steady or stationary phase: It represents cell maturation phase.

Time taken in growth phases (mainly log phase) is called as grand period of growth.