Lecture 17: Improving yield (2)

Question 1

What is the acclimatory response

Answer 1

change components of electron transport chain regarding light intensity

Question 2

what is dynamic acclimation

Answer 2

increase photosynthesis response to light (speed it up)
track conditions in real time

Question 3

process of acclimation across species

Answer 3

not the same
some non-acclimating remain low photosynthetic rate despite high light

Question 4

How can we control dynamic acclimation

Answer 4

GPT2 gene moves sugars across membranes
this response is encoded by photosynthesis products not light itself

Question 5

How can we improve yield by improving architecture

Answer 5

computer modeling of canopies

Question 6

what has computer modeling of canopies taught us

Answer 6

top: erect, pale leaves; RuBisCO rapid, small light harvesting complexes
bottom: flat, dark leaves, specific RuBisCO, fewer, larger light harvesting complexes

Question 7

Is there an ideal planting scheme

Answer 7

Double row spacing lower yield from shading but better for soil

Question 8

LAI optimum for soybean

Answer 8

LAI reduced does not impact yields under elevated CO2