Combined effects of elevated CO2 and natural climatic variation on leaf spot diseases of redbud and sweetgum trees

Andrew J. McElrone, Jason G. Hamilton, Anthony J. Krafnick, Mihai Aldea, Rachel G. Knepp, Evan H Delucia

Research output: Contribution to journalArticle

Abstract

Atmospheric CO2 concentrations are predicted to double within the next century and alter climate regimes, yet the extent that these changes will affect plant diseases remains unclear. In this study conducted over five years, we assessed how elevated CO2 and interannual climatic variability affect Cercospora leaf spot diseases of two deciduous trees. Climatic data varied considerably between the five years and altered disease expression. Disease incidence and severity for both species were greater in years with above average rainfall. In years with above average temperatures, disease incidence for Liquidambar styraciflua was decreased significantly. When significant changes did occur, disease incidence and severity always increased under elevated CO2. Chlorophyll fluorescence imaging of leaves revealed that any visible increase in disease severity induced by elevated CO2 was mitigated by higher photosynthetic efficiency in the remaining undamaged leaf tissue and in a halo surrounding lesions.

Original languageEnglish (US)
Pages (from-to)108-114
Number of pages7
JournalEnvironmental Pollution
Volume158
Issue number1
DOIs
StatePublished - Jan 1 2010

Fingerprint

Liquidambar
Incidence
Plant Diseases
Optical Imaging
Chlorophyll
Climate
Rain
Fluorescence
Temperature
Tissue
Imaging techniques

Keywords

  • Cercis canadensis
  • Cercospora leaf spot
  • Climate change
  • Duke FACE
  • Free-air CO enrichment
  • Fungal plant pathogen
  • Liquidambar styraciflua
  • Plant disease
  • Plant-pathogen interactions

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Combined effects of elevated CO2 and natural climatic variation on leaf spot diseases of redbud and sweetgum trees. / McElrone, Andrew J.; Hamilton, Jason G.; Krafnick, Anthony J.; Aldea, Mihai; Knepp, Rachel G.; Delucia, Evan H.

In: Environmental Pollution, Vol. 158, No. 1, 01.01.2010, p. 108-114.

Research output: Contribution to journalArticle

McElrone, Andrew J. ; Hamilton, Jason G. ; Krafnick, Anthony J. ; Aldea, Mihai ; Knepp, Rachel G. ; Delucia, Evan H. / Combined effects of elevated CO2 and natural climatic variation on leaf spot diseases of redbud and sweetgum trees. In: Environmental Pollution. 2010 ; Vol. 158, No. 1. pp. 108-114.
@article{9baa02f7f6714791b4c5fbcaba8a3a9c,
title = "Combined effects of elevated CO2 and natural climatic variation on leaf spot diseases of redbud and sweetgum trees",
abstract = "Atmospheric CO2 concentrations are predicted to double within the next century and alter climate regimes, yet the extent that these changes will affect plant diseases remains unclear. In this study conducted over five years, we assessed how elevated CO2 and interannual climatic variability affect Cercospora leaf spot diseases of two deciduous trees. Climatic data varied considerably between the five years and altered disease expression. Disease incidence and severity for both species were greater in years with above average rainfall. In years with above average temperatures, disease incidence for Liquidambar styraciflua was decreased significantly. When significant changes did occur, disease incidence and severity always increased under elevated CO2. Chlorophyll fluorescence imaging of leaves revealed that any visible increase in disease severity induced by elevated CO2 was mitigated by higher photosynthetic efficiency in the remaining undamaged leaf tissue and in a halo surrounding lesions.",
keywords = "Cercis canadensis, Cercospora leaf spot, Climate change, Duke FACE, Free-air CO enrichment, Fungal plant pathogen, Liquidambar styraciflua, Plant disease, Plant-pathogen interactions",
author = "McElrone, {Andrew J.} and Hamilton, {Jason G.} and Krafnick, {Anthony J.} and Mihai Aldea and Knepp, {Rachel G.} and Delucia, {Evan H}",
year = "2010",
month = "1",
day = "1",
doi = "10.1016/j.envpol.2009.07.029",
language = "English (US)",
volume = "158",
pages = "108--114",
journal = "Environmental Pollution",
issn = "0269-7491",
publisher = "Elsevier Limited",
number = "1",

}

TY - JOUR

T1 - Combined effects of elevated CO2 and natural climatic variation on leaf spot diseases of redbud and sweetgum trees

AU - McElrone, Andrew J.

AU - Hamilton, Jason G.

AU - Krafnick, Anthony J.

AU - Aldea, Mihai

AU - Knepp, Rachel G.

AU - Delucia, Evan H

PY - 2010/1/1

Y1 - 2010/1/1

N2 - Atmospheric CO2 concentrations are predicted to double within the next century and alter climate regimes, yet the extent that these changes will affect plant diseases remains unclear. In this study conducted over five years, we assessed how elevated CO2 and interannual climatic variability affect Cercospora leaf spot diseases of two deciduous trees. Climatic data varied considerably between the five years and altered disease expression. Disease incidence and severity for both species were greater in years with above average rainfall. In years with above average temperatures, disease incidence for Liquidambar styraciflua was decreased significantly. When significant changes did occur, disease incidence and severity always increased under elevated CO2. Chlorophyll fluorescence imaging of leaves revealed that any visible increase in disease severity induced by elevated CO2 was mitigated by higher photosynthetic efficiency in the remaining undamaged leaf tissue and in a halo surrounding lesions.

AB - Atmospheric CO2 concentrations are predicted to double within the next century and alter climate regimes, yet the extent that these changes will affect plant diseases remains unclear. In this study conducted over five years, we assessed how elevated CO2 and interannual climatic variability affect Cercospora leaf spot diseases of two deciduous trees. Climatic data varied considerably between the five years and altered disease expression. Disease incidence and severity for both species were greater in years with above average rainfall. In years with above average temperatures, disease incidence for Liquidambar styraciflua was decreased significantly. When significant changes did occur, disease incidence and severity always increased under elevated CO2. Chlorophyll fluorescence imaging of leaves revealed that any visible increase in disease severity induced by elevated CO2 was mitigated by higher photosynthetic efficiency in the remaining undamaged leaf tissue and in a halo surrounding lesions.

KW - Cercis canadensis

KW - Cercospora leaf spot

KW - Climate change

KW - Duke FACE

KW - Free-air CO enrichment

KW - Fungal plant pathogen

KW - Liquidambar styraciflua

KW - Plant disease

KW - Plant-pathogen interactions

UR - http://www.scopus.com/inward/record.url?scp=74249121475&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=74249121475&partnerID=8YFLogxK

U2 - 10.1016/j.envpol.2009.07.029

DO - 10.1016/j.envpol.2009.07.029

M3 - Article

C2 - 19679383

AN - SCOPUS:74249121475

VL - 158

SP - 108

EP - 114

JO - Environmental Pollution

JF - Environmental Pollution

SN - 0269-7491

IS - 1

ER -