logging in or signing up milkweed Riccardino Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 139 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: February 20, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Presentation materials prepared by Ed Jepsen, DNR Air Management Biomonitoring Unit: Presentation materials prepared by Ed Jepsen, DNR Air Management Biomonitoring Unit Ground Level Ozone and Common MilkweedGround Level Ozone: Ground Level Ozone Ozone (Smog) is the most damaging regional air pollutant in the United States Areas in the U.S. with High Seasonal Ozone Exposures: Areas in the U.S. with High Seasonal Ozone ExposuresSlide4: foliar injury in natural ecosystems 8 to 12 ppm-hrs growth effects on tree seedlings/saplings 10 to 16 ppm-hrs 10% yield reductions in crops 15 to 20 ppm-hrs All below a proposed 25.5 ppm-hrs seasonal standard Ozone Injury ThresholdsSlide5: When does ozone injury occur? genetically sensitive have adequate growing conditions ozone exposure must exceed tolerance Plant must be: Injury can occur in very sensitive species at chronic hourly exposures of 60 ppbEffects of Ozone on Plants: Effects of Ozone on Plants reduced reproduction reduced photosynthesis reduced height & diameter changes in forest ecosystems weakens sensitive plants to insect/disease stresses Chamber and Field studies have shown:Common Milkweed : Common Milkweed Milky juice Simple stem 1-6 ft tall Hairy leaf Common along roadsides, open fields & disturbed areasOzone Indicator Species: Ozone Indicator Species Milkweed Black Cherry Blackberry Tulip Poplar White Ash Sassafras Sweetgum Pin Cherry Spreading Dogbane Big leaf AsterSlide9: Ozone enters through stomata and attacks the photosynthetically active cells. Palisade layer cell membranes and chemistry are adversely affected.Elevated ozone exposures can kill cells: Elevated ozone exposures can kill cells Dead palisade cells on the upper leaf surface cause the black stipple appearance You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
milkweed Riccardino Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 139 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: February 20, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Presentation materials prepared by Ed Jepsen, DNR Air Management Biomonitoring Unit: Presentation materials prepared by Ed Jepsen, DNR Air Management Biomonitoring Unit Ground Level Ozone and Common MilkweedGround Level Ozone: Ground Level Ozone Ozone (Smog) is the most damaging regional air pollutant in the United States Areas in the U.S. with High Seasonal Ozone Exposures: Areas in the U.S. with High Seasonal Ozone ExposuresSlide4: foliar injury in natural ecosystems 8 to 12 ppm-hrs growth effects on tree seedlings/saplings 10 to 16 ppm-hrs 10% yield reductions in crops 15 to 20 ppm-hrs All below a proposed 25.5 ppm-hrs seasonal standard Ozone Injury ThresholdsSlide5: When does ozone injury occur? genetically sensitive have adequate growing conditions ozone exposure must exceed tolerance Plant must be: Injury can occur in very sensitive species at chronic hourly exposures of 60 ppbEffects of Ozone on Plants: Effects of Ozone on Plants reduced reproduction reduced photosynthesis reduced height & diameter changes in forest ecosystems weakens sensitive plants to insect/disease stresses Chamber and Field studies have shown:Common Milkweed : Common Milkweed Milky juice Simple stem 1-6 ft tall Hairy leaf Common along roadsides, open fields & disturbed areasOzone Indicator Species: Ozone Indicator Species Milkweed Black Cherry Blackberry Tulip Poplar White Ash Sassafras Sweetgum Pin Cherry Spreading Dogbane Big leaf AsterSlide9: Ozone enters through stomata and attacks the photosynthetically active cells. Palisade layer cell membranes and chemistry are adversely affected.Elevated ozone exposures can kill cells: Elevated ozone exposures can kill cells Dead palisade cells on the upper leaf surface cause the black stipple appearance