Plant Growth and Development
Characteristics of Plant Growth
What is Growth?
- It is a characteristic of living beings in which an irreversible permanent increase in size of an organ or its parts occur. In smaller living beings, an increase in the size of a cell can also be termed as growth.
Characteristics of Plant growth
Plant Growth is Indeterminate
- Plants retain the capacity of unlimited growth throughout life.
- Meristems are present in plants that have the ability to divide and self perpetuate.
- Open form of growth − New cells are always being added to the plant by meristem.
- Primary Growth − Occurs due to root apical meristems and shoot apical meristems
- Secondary growth − Occurs due to the appearance of lateral meristems, vascular cambium, and cork cambium later in the life of certain dicots and gymnosperms
Plant Growth is Measurable
- Growth is measured by measuring the parameters that are directly proportional to increase in protoplasm.
- Increase in weight (fresh and dry weight both), length, area, volume, and cell number are some parameters.
- Choice of parameters depends upon type of plant.
For pollen tube − length is the parameter
For water melon − cell size is used
For dorsiventral leaf − surface area is used
This, means that seed germination is the first step in the growth of plants. Lets study more about seed germination.
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