Write a short note on secondary growth in dicot roots?
Answers
Most of the dicotyledonous roots show secondary growth in thickness, similar to that of dicotyledonous stems. However, the roots of extant vascular cryptogams and most monocotyledons do not show any secondary growth; they remain entirely primary throughout their life.
The secondary tissues developed in the dicotyledonous roots are fundamentally quite similar to that of dicotyledonous stems, but the process initiates in some different manner. Certain dicotyledonous roots do not show secondary growth. The secondary vascular tissues originate as a result of the cambial activity. The phellogen gives rise to the periderm.
Information about Secondary Growth-
• The need or the requirement of minerals and water in the plant is fulfilled by this.
• It gives strength to the roots in order to grow aerial parts.
• It is not found in the monocot plants.
• Mostly in this annual rings can't be seen due to no any change in the environment.
• Generally all the cambia and pith rays are secondary in the origin.
• In it cork is developed in the outside while secondary cortex is developed in the inner side.
• Generally the vascular cambium is wavy in the start up but it changes to circular due to the pressure of secondary xylem.