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ARS Home » Midwest Area » Urbana, Illinois » Global Change and Photosynthesis Research » Research » Publications at this Location » Publication #337988
Title: Aboveground and belowground responses to elevated ozone in maize lines: Mo17, B73, & B73 x Mo17

Author
item CHOQUETTE, NICOLE - University Of Illinois
item WEDOW, JESSICA - University Of Illinois
item TOPP, CHRIS - Danforth Plant Science Center
item LEAKEY, ANDREW D B - University Of Illinois
item Ainsworth, Elizabeth - Lisa

Submitted to: American Society of Plant Biologists
Publication Type: Abstract Only
Publication Acceptance Date: 1/31/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Today, rising tropospheric ozone concentrations are estimated to reduce maize yields by 10% in the US. Exposure to ozone decreases plant productivity by reducing photosynthesis. As ozone enters the plant, it reacts to form reactive oxygen species that overwhelm the detoxification potential of the leaf and ultimately leads to reductions in reproductive yield. However, how ozone impacts maize roots has yet to be studied. In this experiment, we analyzed the roots of maize inbred lines, Mo17 and B73, along with the hybrid, B73xMo17, grown at SoyFACE (Soybean Free Air Concentration Enrichment) facility in Savoy, IL. Plants were grown at ambient (~40ppb) and elevated (~100ppb) ozone in a replicated complete factorial design (n=4). Root samples were sent to the Donald Danforth Plant Science Center to be imaged and analyzed by Digital Imaging of Root Traits (DIRT). Additionally, we compared our results to a dosage response study in growth chambers to examine below ground as well as above ground effects of ozone on maize. Eight chambers with ozone concentrations from [0] to [210] ppb (in increments of 30ppb) contained each of the three genotypes, with six subsamples per chamber. This poster will present the results of DIRT and the chamber experiment.