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Title: Elevated Ozone Concentration Reduces Photosynthetic Carbon Gain but Does Not Alter Leaf Structural Traits, Nutrient Composition or Biomass in Switchgrass

Abstract

Elevated tropospheric ozone concentration (O 3) increases oxidative stress in vegetation and threatens the stability of crop production. Current O 3 pollution in the United States is estimated to decrease the yields of maize (Zeamays) up to 10%, however, many bioenergy feedstocks including switchgrass (Panicum virgatum) have not been studied for response to O 3 stress. Using Free Air Concentration Enrichment (FACE) technology, we investigated the impacts of elevated O 3 (~100 nmol mol -1) on leaf photosynthetic traits and capacity, chlorophyll fluorescence, the Ball–Woodrow–Berry (BWB) relationship, respiration, leaf structure, biomass and nutrient composition of switchgrass. Elevated O 3 concentration reduced net CO 2 assimilation rate (A), stomatal conductance (g s), and maximum CO 2 saturated photosynthetic capacity (V max), but did not affect other functional and structural traits in switchgrass or the macro- (except potassium) and micronutrient content of leaves. These results suggest that switchgrass exhibits a greater O 3 tolerance than maize, and provide important fundamental data for evaluating the yield stability of a bioenergy feedstock crop and for exploring O 3 sensitivity among bioenergy feedstocks.

Authors:
 [1];  [2]; ORCiD logo [2];  [3]
  1. Univ. of Illinois, Urbana, IL (United States). DOE Center for Advanced Bioenergy and Bioproducts Innovation. Carl R. Woese Inst. for Genomic Biology. Inst. for Sustainability, Energy, and Environment
  2. Univ. of Caen Normandy (France). National Inst. of Agricultural Research (INRA). Plant Ecophysiology, Agronomy and Nutrition
  3. Univ. of Illinois, Urbana, IL (United States). DOE Center for Advanced Bioenergy and Bioproducts Innovation. Carl R. Woese Inst. for Genomic Biology; USDA Agricultural Research Service (ARS), Urbana, IL (United States). Global Change and Photosynthesis Research Unit
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1505506
Grant/Contract Number:  
SC0018420
Resource Type:
Accepted Manuscript
Journal Name:
Plants
Additional Journal Information:
Journal Volume: 8; Journal Issue: 4; Journal ID: ISSN 2223-7747
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; ozone; switchgrass; photosynthesis; stomatal conductance; chlorophyll fluorescence; leaf anatomy; biomass

Citation Formats

Li, Shuai, Courbet, Galatéa, Ourry, Alain, and Ainsworth, Elizabeth A. Elevated Ozone Concentration Reduces Photosynthetic Carbon Gain but Does Not Alter Leaf Structural Traits, Nutrient Composition or Biomass in Switchgrass. United States: N. p., 2019. Web. doi:10.3390/plants8040085.
Li, Shuai, Courbet, Galatéa, Ourry, Alain, & Ainsworth, Elizabeth A. Elevated Ozone Concentration Reduces Photosynthetic Carbon Gain but Does Not Alter Leaf Structural Traits, Nutrient Composition or Biomass in Switchgrass. United States. doi:10.3390/plants8040085.
Li, Shuai, Courbet, Galatéa, Ourry, Alain, and Ainsworth, Elizabeth A. Tue . "Elevated Ozone Concentration Reduces Photosynthetic Carbon Gain but Does Not Alter Leaf Structural Traits, Nutrient Composition or Biomass in Switchgrass". United States. doi:10.3390/plants8040085. https://www.osti.gov/servlets/purl/1505506.
@article{osti_1505506,
title = {Elevated Ozone Concentration Reduces Photosynthetic Carbon Gain but Does Not Alter Leaf Structural Traits, Nutrient Composition or Biomass in Switchgrass},
author = {Li, Shuai and Courbet, Galatéa and Ourry, Alain and Ainsworth, Elizabeth A.},
abstractNote = {Elevated tropospheric ozone concentration (O3) increases oxidative stress in vegetation and threatens the stability of crop production. Current O3 pollution in the United States is estimated to decrease the yields of maize (Zeamays) up to 10%, however, many bioenergy feedstocks including switchgrass (Panicum virgatum) have not been studied for response to O3 stress. Using Free Air Concentration Enrichment (FACE) technology, we investigated the impacts of elevated O3 (~100 nmol mol-1) on leaf photosynthetic traits and capacity, chlorophyll fluorescence, the Ball–Woodrow–Berry (BWB) relationship, respiration, leaf structure, biomass and nutrient composition of switchgrass. Elevated O3 concentration reduced net CO2 assimilation rate (A), stomatal conductance (gs), and maximum CO2 saturated photosynthetic capacity (Vmax), but did not affect other functional and structural traits in switchgrass or the macro- (except potassium) and micronutrient content of leaves. These results suggest that switchgrass exhibits a greater O3 tolerance than maize, and provide important fundamental data for evaluating the yield stability of a bioenergy feedstock crop and for exploring O3 sensitivity among bioenergy feedstocks.},
doi = {10.3390/plants8040085},
journal = {Plants},
number = 4,
volume = 8,
place = {United States},
year = {2019},
month = {4}
}

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