1041SCG Lecture Notes - Lecture 7: Ground Tissue, Meristem, Indeterminate Growth
27 Dec 2018
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Week 7 plant growth and development, resource acquisition and transport, soil and plant nutrients. Plant growth and development: growth occurs throughout a plant"s life (indeterminate growth) Plant has embryonic, developing and mature organs all at the same time: all tissue originates from rapidly dividing undifferentiated tissues called meristems, plant life length: Annual plants complete life cycle in a year or less. Biennial plants require two growing seasons to complete life cycle. Perennial plants live many years and don"t die of old age, usually from disease or environmental trauma. Initially there are two meristems in embryo; one creates the roots and the other creates the shoots: primary growth in roots. If a resource rich pocket is detected in surrounding soil the plant stimulates branching of roots. Lateral roots arise from stem cells on the edge of the vascular cylinder: pushes through the outer tissue until it emerges from the established root, develops into fully grown lateral roots.
