Plant Growth and Movement
Growth is defined as the irreversible permanent increase in size of an organ or its parts of organisms including plants. Growth involves metabolic processes occurring at the expense of energy. Growth is followed by development. The development is about all the changes that occur in the life cycle of a plant from germination of the seed to senescence . The development in plants is controlled by different factors categorized as intrinsic and extrinsic factors . The intrinsic factors are both the intracellular (genetic) or intercellular factors (chemicals such as plant growth regulators). The extrinsic factors include light, temperature, water, oxygen, and nutrition, etc. Concept on seed germination Seed germination is the fundamental process by which different plants grow from a single seed into a complete plant. It brings about the sprouting of a seedling from a seed of angiosperms and gymnosperms. Process of seed germination Step 1: Imbibition Firstly, the dry seed takes up water rapid...
