Claim · model-written summary
The sap concentration of Eureka lemon leaves increases more rapidly than that of Valencia orange leaves under direct sunlight.
- Taxon
- Eureka lemone1
- Treatment
- direct sunlighte1
- Outcome
- concentratione1
- Direction
- more rapidlye1
- Comparator
- Valencia orange leavese1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Verbatim
e1“The sap of Eureka lemon leaves on exposure to direct sunlight increases its concentration more rapidly than does that of Valencia orange leaves”
Title
Effect of Sunlight on Sap Concentration of Citrus Leaves
F. F. Halma; A. R. C. Haas Botanical Gazette 1928. doi:10.1086/333876
Other claims from this paper (8)
- Association Direct sunlight increases the sap concentration of Eureka lemon and Valencia orange leaves.
- Mechanism Increases in sap concentration caused by sunlight are due entirely to photosynthetic products.
- Association The ash of the sap remains the same under sunlit and shaded conditions in citrus leaves.
- Association A greater percentage of the cross-sectional diameter of Eureka lemon leaves is occupied by palisade tissue than in Valencia orange leaves.
- Association More magnesium is found in the sap of Eureka lemon leaves than in Valencia orange leaves.
- Mechanism The greater sap concentration increase in lemon leaves may be due to a more efficient photosynthetic system.
- Association The great variation in sap concentration of citrus leaves brought about by direct sunlight.
- Recommendation Indiscriminate sampling of citrus leaves may cause large errors.