Variation in plant growth response to elevated co2

Variation in plant growth response to elevated CO2

Genotypic variation in elevated CO2 response

1. Photosynthetically active radiation (PAR)

• 1. Photosynthetically active radiation (PAR)

Sun and shade plant adaptations to light

A. Allocation and exponential growth

• A. Allocation and exponential growth

Maximize gain of fixed carbon

• Maximize gain of fixed carbon

• Need other resources to do that

• Efficiency of resource use (“cost and revenue”)

• Optimal allocation: co-limitation by multiple resources

C3, C4, and CAM photosynthesis

• C3, C4, and CAM photosynthesis

• READING: pp. 134-139

1. Multiple limitations: New limitations may arise in ecosystem context not seen in individual plant experiments.

• 1. Multiple limitations: New limitations may arise in ecosystem context not seen in individual plant experiments.

• 2. Allocation: Optimal foraging

• 3. Different strategies: tradeoffs

End