TY - JOUR
T1 - Do volatile compounds produced by Fusarium oxysporum and Verticillium dahliae affect stress tolerance in plants?
AU - Li, Ningxiao
AU - Kang, Seogchan
N1 - Funding Information:
This work was supported by the USDA-NIFA Agriculture and Food Research Initiative Competitive Grants Program (award no. 2010-65110-20488), a fellowship from the Storkan-Hanes-McCaslin Foundation, the Penn State College of Agricultural Sciences (Jeanne & Charles Rider Endowment Award and Strategic Collaboration Seed Grant), the Huck Institutes of the Life Sciences at Penn State (the Huck Dissertation Research Award), and the Penn State Center for Environment geoChemistry and Genomics. We would like to thank Sara May for allowing us to use their equipment, Dr. Krishna Subbarao for V. dahliae strains and Dr. Darrell Desveaux for supplying transgenic Col-0 containing DR5::GUS.
Funding Information:
This work was supported by the National Institute of Food and Agriculture: [Grant Number 2010-65110-20488].
Publisher Copyright:
© 2018, © 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2018/7/3
Y1 - 2018/7/3
N2 - Volatile compounds (VCs) produced by diverse microbes seem to affect plant growth, development and/or stress tolerance. We investigated how VCs released by soilborne fungi Fusarium oxysporum and Verticillium dahliae affect Arabidopsis thaliana responses to abiotic and biotic stresses. Under salt stress, VCs from both fungi helped its growth and increased chlorophyll content. However, in contrast to wild-type A. thaliana (Col-0), V. dahliae VCs failed to increase leaf surface area in auxin signalling mutants aux1-7, tir1-1 and axr1-3. Compared to wild-type Col-0, the degree of lateral root density enhanced by V. dahliae VCs in these mutants was also reduced. Consistent with the involvement of auxin signalling in fungal VC-mediated salt torelance, A. thaliana line carrying DR5::GUS displayed increased auxin accumulation in root apex upon exposure to V. dahliae VCs, and 1-naphthylphthalamic acid, an auxin transport inhibitor, adversely affected V. dahliae VC-mediated salt tolerance. F. oxysporum VCs induced the expression of PR1 but not PDF1.2 in A. thaliana lines containing PR1::GUS and PFD1.2::GUS. When challenged with Pseudomonas syringae after the exposure to F. oxysporum VCs, A. thaliana showed reduced disease symptoms. However, the number of bacterial cells in F. oxysporum VC-treated plants was not significantly different from that in control plants.
AB - Volatile compounds (VCs) produced by diverse microbes seem to affect plant growth, development and/or stress tolerance. We investigated how VCs released by soilborne fungi Fusarium oxysporum and Verticillium dahliae affect Arabidopsis thaliana responses to abiotic and biotic stresses. Under salt stress, VCs from both fungi helped its growth and increased chlorophyll content. However, in contrast to wild-type A. thaliana (Col-0), V. dahliae VCs failed to increase leaf surface area in auxin signalling mutants aux1-7, tir1-1 and axr1-3. Compared to wild-type Col-0, the degree of lateral root density enhanced by V. dahliae VCs in these mutants was also reduced. Consistent with the involvement of auxin signalling in fungal VC-mediated salt torelance, A. thaliana line carrying DR5::GUS displayed increased auxin accumulation in root apex upon exposure to V. dahliae VCs, and 1-naphthylphthalamic acid, an auxin transport inhibitor, adversely affected V. dahliae VC-mediated salt tolerance. F. oxysporum VCs induced the expression of PR1 but not PDF1.2 in A. thaliana lines containing PR1::GUS and PFD1.2::GUS. When challenged with Pseudomonas syringae after the exposure to F. oxysporum VCs, A. thaliana showed reduced disease symptoms. However, the number of bacterial cells in F. oxysporum VC-treated plants was not significantly different from that in control plants.
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U2 - 10.1080/21501203.2018.1448009
DO - 10.1080/21501203.2018.1448009
M3 - Article
C2 - 30181923
AN - SCOPUS:85043331779
VL - 9
SP - 166
EP - 175
JO - Mycology
JF - Mycology
SN - 2150-1203
IS - 3
ER -