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Introduction to Growth and Development in plants.
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P ositive and Irreversible increase in size over a period of time. A lways accompanied by metabolism. Expense of energy.
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Measurement of Growth (inc in protoplasmic content).
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Cell division/ Cell formation/ Meristem phase Number of cells increases Cells are rich in protoplasm, conspicuous nuclei, thin and primary cell wall and abundant plasmodesmatal connection. Cell elongation/ Cell enlargement phase Size of cell increases Increase in size of vacuoles, turgar pressure. Cell maturation / Cell maturation/ differentiation phase Thickening of cell wall and modification in protoplasm Qualitative changes Maturation of tissues.
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Image result for phases of plant growth in root zone.