Improving Crop Yield Flashcards

1
Q

What is the RIPE project?

A

Realizing increased photosynthetic efficiency.
They look at improving NPQ, altering photorespiration, improving photosynthesis.

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2
Q

How can NPQ be improved and what does this cause?

A

By expressing 3 genes:
- VDE
- ZEP
- Psbs
tobacco: 14-20% increase in biomass
soybean: 30% increase in biomass

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3
Q

How can photorespiration be altered to improve yield and what does it result in?

A

Alternative pathway 3
Introduces 2 genes:
- Cucurbita maxima malate synthase
- Chlamydomonas reinhardtii glycolate dehydrogenase
Results in higher photosynthetic rate and increased quantum yield.

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4
Q

What do AP3 (alternative pathway 3) plants do?

A

Develop faster, grow taller and produce 40% more biomass.

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5
Q

What are the 2 ways photosynthesis can be sped up?

A
  • Faster electron transport
  • Faster calvin cycle
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6
Q

How is electron transport sped up?

A

Adding in cytochrome complex from red algae:
- FBP/SBPase
- SBPase
- SBPase + cytochrome c6

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7
Q

How is the calvin cycle sped up and how much did yield increase in the greenhouse?

A

Adding faster FBP/SBPase from cyanobacteria.
52% increase yield in greenhouse

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