Claim · model-written summary
The decrease in RuBP could contribute to the drought-induced decrease in photosynthesis, at least in C. dactylon and Z. japonica.
- Taxon
- C. dactylon
Cynodon dactylone0 - Compound
- RuBPe0
- Outcome
- drought-induced decrease in photosynthesise0
- Qualifier
- at least in C. dactylon and Z. japonicae0
Verbatim
e0“The magnitude of the decrease in RuBP suggested that, at least in C. dactylon and Z. japonica, it could contribute to the drought-induced decrease in photosynthesis”
Title
Rubisco activities, properties, and regulation in three different C4 grasses under drought
A. Elizabete Carmo-Silva; Alfred J. Keys; P. John Andralojc; et al. Journal of Experimental Botany 2010. doi:10.1093/jxb/erq071
Other claims from this paper (9)
- Observation Rubisco from each of the three C4 grasses had smaller specificity factors (SC/O) than Rubisco from wheat.
- Observation Rubisco from each of the three C4 grasses had larger Michaelis-Menten constants for CO2 and O2 and larger maximum carboxylation velocities than Rubisco from wheat.
- Intervention effect During leaf dehydration the quantity and maximum activity of Rubisco remained unchanged in the C4 grasses.
- Intervention effect During leaf dehydration the initial and total activities of Rubisco declined slightly, possibly due to increased inhibition.
- Observation Tight-binding inhibitors of Rubisco were present in the light but were more abundant in the dark, especially in Z. japonica.
- Intervention effect Tight-binding inhibitors of Rubisco increased in quantity with drought stress.
- Observation The inhibitor from darkened leaves of Z. japonica was identified as 2-carboxyarabinitol-1-phosphate (CA1P).
- Intervention effect The total activity of Rubisco was decreased after 12 h darkness in Z. japonica.
- Intervention effect Ribulose-1,5-bisphosphate (RuBP) in the leaves decreased with drought stress, to quantities approximating those of Rubisco catalytic sites.