Main Title |
Covariate Measurements for Increasing the Precision of Plant Response to O3 and SO2. |
Author |
Ormrod, D. P. ;
Tingey, D. T. ;
Gumpertz, M. ;
|
CORP Author |
Corvallis Environmental Research Lab., OR. ;Guelph Univ. (Ontario). Dept. of Horticultural Science. ;Northrop Services Inc., Corvallis, OR. |
Year Published |
1983 |
Report Number |
EPA-600/J-83-193; |
Stock Number |
PB84-177542 |
Additional Subjects |
Plants(Botany) ;
Ozone ;
Sulfur dioxide ;
Air pollution ;
Plant growth ;
Radish ;
Lettuce ;
Exposure ;
Harvesting ;
Farm crops ;
Reprints ;
Baseline measurements
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB84-177542 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
6p |
Abstract |
Lettuce (Lactuca sativa L. ev. Grand Rapids) and radish (Raphanus sativus L. cv. Cherry Belle) plants growing at baseline environmental conditions were exposed to charcoal-filtered air, 0.40 ppm (v/v) ozone, and 0.80 ppm sulfur dioxide alone or in combination for 6 hours at 14 days from seeding. Analysis of covariance was used to account for significant within-treatment variation in plant growth. Covariates used were: planar leaf area (PLA) at 14 days for leaf area, fresh weight, and dry weight, and dry weight at harvest; plastochron index (PI) at 14 days for PI at harvest; and hypocotyl diameter for hypocotyl weights of radish roots at harvest. The covariates reduced the variability (Standard geometric errors) of the response variables and increased the precision of statistical tests substantially for lettuce but much less for radish. For lettuce, the effect of the gas mixture on plant growth and foliar injury was less severe than that of the single gases. Radish plants, in contrast, exhibited no response to SO2 and the effects of O3 and the mixture on foliar injury and plant growth were similar. |
Supplementary Notes |
Prepared in cooperation with Guelph Univ. (Ontario). Dept. of Horticultural Science and Northrop Services, Inc., Corvallis, OR. |
Availability Notes |
Pub. in HortScience, v18 n6 p896-898 1983. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Covariate Measurements for Increasing the Precision of Plant Response to O3 and SO2. |
PUB Date Free Form |
c1983 |
Category Codes |
6C; 2D; 57C; 68A; 98D |
NTIS Prices |
Not available NTIS |
Primary Description |
600/02 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
421620767 |
Origin |
NTIS |
Type |
CAT |