Claim · model-written summary
Water-limited cassava leaves showed amplified heliotropism and drooping.
- Taxon
- Cassava
Manihot esculentat0 - Outcome
- heliotropic response and droopinge0
- Direction
- amplifiede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was combined with an amplified heliotropic response and drooping which minimises radiant energy interception at mid-day”
t0“Drought-Adapted Cassava”
Title
Photosynthesis in Drought-Adapted Cassava
P. A. Calatayud; E. Llovera; J.F. Bois; et al. Photosynthetica 2000. doi:10.1023/a:1026704226276
Other claims from this paper (13)
- Intervention effect Limited water supply reduced cassava shoot growth.
- Intervention effect Limited water supply caused high cassava leaf fall.
- Intervention effect Limited water supply decreased cassava stomatal conductance.
- Intervention effect Remaining cassava leaves retained water status under limited supply.
- Observation In well-irrigated cassava, young leaves had fivefold higher oxygen evolution and photosynthetic rate than mature leaves.
- Intervention effect Water limitation did not strongly change carbon dioxide saturated oxygen evolution.
- Observation Mature drought-adapted leaves retained only a residual net photosynthetic rate.
- Observation Mature drought-adapted leaves had deteriorated PS2 photochemistry.
- Intervention effect At moderate irradiance, young stressed leaves had a 66 % reduction in net photosynthesis.
- Observation At moderate irradiance, young stressed and control leaves had comparable photochemical quenching and PS2 quantum efficiency.
- Observation At high irradiance, net photosynthesis was almost absent.
- Observation At high irradiance, the two fluorescence parameters decreased markedly.
- Mechanism The authors interpret leaf heliotropism and drooping under water limitation as a way to avoid high-irradiance photosynthetic inactivation.