TY - JOUR
AU - Wolf, Joanne 
                      W.
AB -  Forty-seven species of annual plants from the Mojave Desert were grown in pots and exposed in open-top field chambers located at Riverside, California to test their relative sensitivity to SO2 and 0 3 . Exposures were 8 h/day for four or five days at 0,0.05, 0.1, 0.2, 0.3 and 0.4 ppm O3 or 0, 0.2, 0.5, 0.6, 0.8, 1.0 and 1.5 ppm SO2. Species differed widely in their response to the pollutants. Three species, Camissonia claviformis, Camissonia hirtella and Cryptantha nevadensis, were quite sensitive to both pollutants, exhibiting leaf injury when exposed to 0.1 ppm O3 or 0.2 ppm SO2. Two species: Festuca octoflora and Lepidium lasiocarpum were tolerant to both pollutants, exhibiting no leaf injury with concentrations of 0.3 ppm O3 or 1.5 ppm SO2. The other species were intermediate in sensitivity, with O3 sensitivity not always corresponding to SO2 sensitivity. Total sulfur concentration analysis indicated that for 8 of 11 species tested, plants exposed to 0.2 ppm SO2 had a higher sulfur concentration than nonexposed plants. Baileya pleniradiataand Perityle emoryi had the greatest increases in sulfur concentration for exposed versus control plants. To test for effects of the environmental and exposure system on plant sensitivity, 29 of the species exposed in the open-top chambers were grown in the ground and exposed with a modified chamberless zonal air pollution (ZAP) system to SO2 in the Mojave Desert area near Daggett, California. Exposures were for a total of 37 h over six days to 0, 0.4, 0.8 and 1.0 ppm SO2 with exposures only during periods with due west winds. Most of the species were not injured with any of the S02 exposure concentrations used with the ZAP system; only Camissonia claviformis showed injury at 0.8 ppm SO2 and Oenothera californica exhibited injury at 1.0 ppm SO2. 
TI - Effects of Ozone or Sulfur Dioxide on Annual Plants of the Mojave Desert
JF - Journal of the Air Pollution Control Association
DO - 10.1080/00022470.1984.10465849
DA - 1984-10-01
UR - https://www.deepdyve.com/lp/taylor-francis/effects-of-ozone-or-sulfur-dioxide-on-annual-plants-of-the-mojave-jTK0N8Dsoh
SP - 1017
EP - 1022
VL - 34
IS - 10
DP - DeepDyve
ER -