Climate-Resilient Plants Flashcards
What FOUR traits have been improved in crops by modulating PHY expression? (X)
Enhanced Yield
Improved grass quality
Shade tolerance
Stress resistance
What TRANSGENIC plants had a PhyA mutant in Gururani et al (2015)? (X)
Rice / Potato / Sweet potato
Japanese Lawn Grass
Creeping Bentgrass
What happens to Ara in high temperature? (X)
Rapid axial extension
Leaf hyponasty
Early flowering
(Auxin involved)
(Parallel shade responses)
Which high-temp responses mediated by PIF4? (X)
Axial Elongation
Leaf Hyponasty
(NOT flowering)
What 3 roles of PIF4 do we know now? (X)
Light Sig - PHY
Giberellin Sig - DELLA
Temp Response - induce IAA29
What happens to PIF in the WARM (15 > 25 degrees)?
Expression HIGHER
Levels NOT DEPLETED by phyBPfr
in the light
What does PIF4 have to do with Auxin (in the WARM)?
It BINDS to and UPREGULATES Auxin Synthesis Genes
Too much PIF4 is not good… how to prevent this at high temp?
HFR1 offers protection!
STABILISED by light
(Unlike PIF4)
Needs CRY1 to prevent its deg
What does PhyB over-expression In potato cause? (Physiology - 3)
HIGHER Leaf:Biomass
HIGHER photosynth pigments
Changes plant ARCHITECTURE
What does PhyB over-expression In potato cause? (Crop Improvement - 2)
HIGHER CO2 Uptake
HIGHER Yield
How can we boost potato yield at high temperatures?
Tuberisatjon Genes are SUPPRESSED at 30 (not 22)
K.O. a PIF4 regulator!
How can we improve crop lodging?
Improve plant stature
PhyBox plants do better
How much may we need to increase food production in the next 40 years?
Increase by 70%
( ! ) What are some Crop Improvement needs? (5)
TOLERANCE (dry/cold/heat)
PATHOGEN resistance
NUTRITION
Better drugs/supplements
Better STORAGE (grains/crops)
What are some LOW-TECH crop improvement methods?
Light QUALITY
Light QUANTITY
Light TIMING
TEMP regimens
