a. In monocot plants (berkepingan one).
- Trunk berkambium not, so it does not grow bigger.
- Binds haul collateral vessels closed.
- File transport vessels scattered visible.
b. In dicotyledonous plants (dashed two).
- Trunk berkambium so it can grow bigger.
- Association payload type of collateral vessels open.
- File transport vessels appear regularly in a circle.
Primary and Secondary Growth Growth.
Primary growth is caused by the growth of the primary growing point, namely the growing point at the far ends of the roots and stems of primary growth in the root tip and the tip of the stem, causing root and stem length increases.
Secondary growth is growth caused by secondary growth point, there is a growing point between the xylem and phloem, the cambium, a secondary growth point. Cambium activity resulting in the roots and stems of dicotyledonous plants grow.
Because of this cambium activity out form phloem or wood bark vessels, whereas in the form xylem or wood vessels. Because the monocots not found the cambium, the roots and stems of monocots can not grow bigger.
Growth direction in the cambium tissue faster than the formation of the network towards the outside. This causes the tissue protective outer cracked or damaged. Secondary thickened growth does not take place throughout the year.
But only when sufficient water and nutrients or during rainy. While the drought, where water and illicit substances bit, secondary growth stalled. Events grow and atrophy occurs interchangeably throughout the plant life. So that the cross sections of roots and stems of plants dicotyledonous appears the concentric circles called the circle.
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