Claim · model-written summary
The shoot growth decrease threshold for most cultivars was between 0.06 and 0.10 ppm.
- Taxon
- spinach
Spinacia oleraceae0 - Outcome
- shoot growthe0
- Direction
- decreasee0
- Value
- between 0.06 and 0.10 ppme0
Verbatim
e0“The threshold for a significant decrease in shoot growth of most spinach cultivars was between 0.06 and 0.10 ppm.”
Title
Injury and Yield Responses of Spinach Cultivars to Chronic Doses of Ozone in Open‐Top Field Chambers
A. S. Heagle; R. B. Philbeck; M. B. Letchworth Journal of Environmental Quality 1979. doi:10.2134/jeq1979.00472425000800030021x
Other claims from this paper (9)
- Observation Eleven cultivars differed significantly in ozone-associated foliar injury and shoot growth decrease.
- Observation America, Winter Bloomsdale and Seven-R had less foliar injury than Chesapeake, Hybrid-612 and Dixie Market.
- Observation America and Viroflay had less shoot growth effect than most cultivars.
- Observation Hybrid-612 and Dark Green Bloomsdale had more shoot growth effect than most cultivars.
- Observation The foliar injury threshold was between 0.02 and 0.06 ppm mean ozone.
- Intervention effect Ground-grown spinach at 0.06 ppm had 18% less shoot fresh weight than at 0.02 ppm.
- Intervention effect Ground-grown spinach at 0.10 ppm had 37% less shoot fresh weight than at 0.02 ppm.
- Intervention effect Ground-grown spinach at 0.13 ppm had 69% less shoot fresh weight than at 0.02 ppm.
- Observation Potted spinach showed comparative shoot fresh weight reductions of 4, 25 and 65% across the reported ozone doses.