Secondary growth in a Dicot stem
Автор: Advanced Botany
Загружено: 2025-04-10
Просмотров: 545
#secondarygrowth #planttissue #dicotstem
The increase in length of the shoot and the root is termed as primary growth.
In gymnosperms and most dicotyledons primary growth is followed by secondary growth.
Secondary growth results in increase in diameter of stems and roots.
Primary growth is a result of rapidly-dividing cells in the apical meristems at the shoot tip and root tip.
The influence of the apical bud on overall plant growth is known as apical dominance, which diminishes the growth of axillary buds that form along the sides of branches and stems.
The increase in stem thickness that results from secondary growth is due to the activity of the lateral meristems.
Lateral meristems include the vascular cambium and, in woody plants, the cork cambium.
The thickening of the stem that occurs in secondary growth is due to the formation of secondary phloem and secondary xylem.
The cells of the secondary xylem contain lignin, which provides hardiness and strength...
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