How We Could Prevent a Global Rice Shortage

The video discusses the global dependency on rice and the challenges of meeting increasing demand due to population growth. It explains the C3 photosynthesis process used by rice and its inefficiencies, especially in warmer climates. The video introduces C4 photosynthesis, used by some plants like corn, which is more efficient in certain conditions. Researchers are exploring genetic modifications to convert rice from C3 to C4 photosynthesis, potentially increasing yield and efficiency. This could significantly boost rice production, helping to meet future food demands.

What is the primary challenge in meeting the global demand for rice?

• Overproduction of rice

• Limited agricultural space

• Lack of water resources

• Decreasing rice consumption

What enzyme initiates the C3 photosynthesis process in rice?

• NADP+ reductase

• RuBisCO

• ATP synthase

• Photosystem II

Why does C3 photosynthesis become less efficient in higher temperatures?

• The plant's stomata close

• RuBisCO processes oxygen instead of carbon dioxide

• The plant produces less chlorophyll

• Water availability decreases

What is a key difference between C3 and C4 photosynthesis?

• C4 uses more water than C3

• C4 involves a different enzyme for initial CO2 fixation

• C3 produces a four-carbon acid initially

• C3 is more efficient in high temperatures

What is a potential downside of C4 photosynthesis?

• It is less efficient in cooler temperatures

• It requires more sunlight

• It uses more nitrogen

• It is less efficient in high temperatures

What is the main goal of current research on rice photosynthesis?

• To reduce the water requirement of rice

• To convert rice from C3 to C4 photosynthesis

• To make rice resistant to pests

• To increase the size of rice grains

What potential benefit could C4 rice provide?

• It could increase photosynthesis efficiency by 50%

• It could double the rice yield

• It could make rice plants grow faster

• It could reduce the need for fertilizers