EduNinjaThe cereal crop rice, Oryza sativa, grows in fields that are flooded with water. The roots of the rice plants are submerged in water that contains very little oxygen.
Describe and explain how rice plants are adapted to grow in flooded fields.
Oryza is a genus of grass plants that includes the rice, Oryza sativa, a food crop.
Farmers flood fields of rice because this encourages faster growth and higher yields.
An adaptation of rice plants that allows them to grow in water is the development of aerenchyma.
State the function of aerenchyma.
State one other way in which the roots of rice are adapted to being submerged in water.
Cultivated rice, Oryza sativa, is often grown in fields flooded with water.
Explain how rice plants are adapted for growth with the roots submerged in water.
In anaerobic soil, bacteria, such as Pseudomonas stutzeri, can use nitrate ions ( ) as a source of oxygen for their respiration. The word equation below summarises the process:
In recent years there has been an increase in flooding of agricultural land worldwide.
Explain why crop yields are often significantly reduced even after the flood water has drained away.
Some plants, such as rice, grow with their roots submerged in water.
Fig. 7.2 shows a group of rice plants.
Fig. 7.2
Explain how rice is adapted to grow with its roots submerged in water.
Explain how rice is adapted to grow with its roots submerged in water.
Explain how rice is adapted to grow with its roots submerged in water.
Explain how rice is adapted to growing in flooded fields.