Question

Describe how the vascular cambium arises in a shoot. ...in a root. List two features that allow plants to withstand flooding of the root zone. Explain.

Answer 1

problem: Describe how the vascular cambium arises in a shoot. ...in a root. List two features that allow plants to withstand flooding of the root zone. Explain.

ans: the vascular cambium is main meristem in the stem consisting of flattened and undifferentiated cells. vascular meristem produce cells which differentiate into xylem and phloem.The apical meristem in shoot and root contain procambium. Provascular tissue differentiate to vascular tissue in the primary root and hypocotyl while shoot vascular tissue located in vascular bunddle which is derived from the shoot apical meristem. Cambium develope from procambium which is embedded between xylem and phloem. In the shoot cambium located between the vascular bundles which arise from parenchyma and endodermis tissues. In root complete ring of vascular cambium is form early.In shoot the same process is a late event occurring only after initiation of the interfascicular cambium between the vascular bundles. this vascular cambium further develop into secondary xylem and phloem in root and shoot.

Aerenchyma formation and Adventitious root formation which have high porosity allowing plant to take nutrient in flooding condition and allow plant to withstand. Another feature is stem hypertrophy which is white spongy tissue with intercellular gas space.its increase gas movement between water and plant tissue.