Plant Growth And Development Ppt Download Top [better] 【iPhone TESTED】
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Plant growth is not uniform; it follows a characteristic pattern often represented by a sigmoid curve. This process begins with Cell Division (mitosis) in the meristematic regions, primarily found at the tips of roots and shoots (apical meristems). Following division, cells enter the Cell Elongation phase, where they enlarge by absorbing water and developing a large central vacuole. The final stage is Cell Maturation , where cells differentiate into specific types—such as parenchyma, collenchyma, or sclerenchyma—to perform specialized functions. This transition from generic cells to specialized tissues is what allows a plant to develop structural integrity and functional complexity.
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The programmed, natural aging process of plant organs (leaves, flowers, fruits), culminating in death or shedding (abscission). This allows plants to salvage nutrients and redirect them to surviving structures or seeds.
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: Formative (cell division), Elongation (cell enlargement), and Maturation (differentiation). Plant Growth Regulators (PGRs) : Hormones such as Gibberellins Cytokinins that act as the plant's internal control system. Indeterminate Growth
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These include the vascular cambium and cork cambium, responsible for secondary growth (girth/thickness). Following division, cells enter the Cell Elongation phase,
Photoperiodism, Vernalization, Seed Germination.
An irreversible increase in size, mass, or volume, driven by cell division (mitosis) in meristematic tissues and subsequent cell elongation.
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Cell enlargement, increased vacuolation, and new cell wall deposition.