Claim · model-written summary
Fertilizer addition lowered carbohydrate levels in some combinations of drought and defoliation.
- Taxon
- Black Oakt0
- Treatment
- Addition of fertilizer to the soile7
- Outcome
- carbohydrate levelse7
- Direction
- lowere7
- Qualifier
- in some combinations of drought and defoliatione7
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Verbatim
t0“Black Oak Seedlings”
e7“Addition of fertilizer to the soil had no effect on growth, but in some combinations of drought and defoliation it resulted in lower carbohydrate levels”
Title
Effects of Drought and Defoliation on Some Metabolites in Roots of Black Oak Seedlings
Johnson Parker; Roy L. Patton Canadian Journal of Forest Research 1975. doi:10.1139/x75-063
Other claims from this paper (8)
- Intervention effect Defoliation lowered root starch levels in watered black oak seedlings in two separate experiments.
- Intervention effect Starch levels in unwatered, non-defoliated seedlings were lower only under severe drought.
- Intervention effect Drought and defoliation together lowered starch levels more than either factor alone.
- Intervention effect Reducing sugars and several amino acids were higher in unwatered seedlings than in nondefoliated and watered ones, but not under less severe drought.
- Intervention effect Reducing sugars and certain amino acids showed some increase in averages in once- and twice-defoliated watered plants.
- Intervention effect Catechin and quercitrin levels were usually lower in defoliated than in nondefoliated seedlings, regardless of watering.
- Intervention effect Catechin and quercitrin levels were higher in unwatered than in watered seedlings, regardless of defoliation.
- Intervention effect Fertilizer addition had no effect on seedling growth.