Claim · model-written summary
Replacing nitrate with chloride reduced lettuce growth after approximately five days.
- Taxon
- Lactuca sativa L.
Lactuca sativae2 - Material
- deci minore2
- Treatment
- chloride was substituted for the nitratee0
- Outcome
- growthe1
- Direction
- reductione1
- Qualifier
- Approximately 5 days latere1
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chloride was substituted for the nitrate in the nutrient solution”
e1“Approximately 5 days later a reduction in growth occurred.”
e2“lettuce plants (Lactuca sativa L., cv. deci minor) under low light conditions”
Title
Greet Blom‐Zandstra; Jan E. M. Lampe Journal of Plant Nutrition 1983. doi:10.1080/01904168309363129
Other claims from this paper (13)
- Intervention effect Replacing nitrate with sulphate reduced lettuce growth after approximately five days.
- Observation Plant nitrate was not completely exhausted and was very slowly available for reduction in leaf blades and midribs.
- Intervention effect It was immaterial whether sulphate or chloride replaced nitrate.
- Observation Chloride was taken up from the nutrient solution.
- Observation Sulphate was not taken up from the nutrient solution.
- Intervention effect Sugars accumulated as nitrate content decreased in chloride-treated plants.
- Intervention effect Sugars accumulated as nitrate content decreased in sulphate-treated plants.
- Intervention effect Actual leaf blade nitrate reductase activity decreased after chloride treatment and was negligible on day 12.
- Intervention effect Actual leaf blade nitrate reductase activity decreased after sulphate treatment and was negligible on day 12.
- Intervention effect Potential nitrate reductase activity in chloride-treated plants remained 50% of control.
- Intervention effect Potential nitrate reductase activity in sulphate-treated plants remained 50% of control.
- Mechanism Nitrate availability from storage is suggested to limit nitrate reductase activity independently of metabolic demand.
- Recommendation Growers may benefit from hydroponic nitrate removal several days before harvest to lower vegetable nitrate under low light.