Enzyme regulation patterns in fungal inoculated wheat may reflect resistance and tolerance towards an insect herbivore
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Enzyme regulation patterns in fungal inoculated wheat may reflect resistance and tolerance towards an insect herbivore. / Rasool, Shumaila; Jensen, Birgit; Roitsch, Thomas G.; Meyling, Nicolai V.
I: Journal of Plant Physiology, Bind 300, 154298, 2024.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Enzyme regulation patterns in fungal inoculated wheat may reflect resistance and tolerance towards an insect herbivore
AU - Rasool, Shumaila
AU - Jensen, Birgit
AU - Roitsch, Thomas G.
AU - Meyling, Nicolai V.
N1 - Publisher Copyright: © 2024 The Author(s)
PY - 2024
Y1 - 2024
N2 - Seed inoculation with entomopathogenic fungi (EPF) causes plant-mediated effects against arthropod herbivores, but the responses vary among EPF isolates. We used a wheat model system with three isolates representing Beauveria bassiana and Metarhizium spp. causing either negative or positive effects against the aphid Rhopalosiphum padi. Activities of six carbohydrate enzymes increased in plants showing biomass build-up after EPF inoculations. However, only aldolase activity showed positive correlation with R. padi numbers. Plants inoculated with M. robertsii hosted fewest aphids and showed increased activity of superoxide dismutase, implying a defense strategy of resistance towards herbivores. In M. brunneum-inoculated plants, hosting most R. padi, activities of catalase and glutathione reductase were increased suggesting enhanced detoxification responses towards aphids. However, M. brunneum simultaneously increased plant growth indicating that this isolate may cause the plant to tolerate herbivory. EPF seed inoculants may therefore mediate either tolerance or resistance towards biotic stress in plants in an isolate-dependent manner.
AB - Seed inoculation with entomopathogenic fungi (EPF) causes plant-mediated effects against arthropod herbivores, but the responses vary among EPF isolates. We used a wheat model system with three isolates representing Beauveria bassiana and Metarhizium spp. causing either negative or positive effects against the aphid Rhopalosiphum padi. Activities of six carbohydrate enzymes increased in plants showing biomass build-up after EPF inoculations. However, only aldolase activity showed positive correlation with R. padi numbers. Plants inoculated with M. robertsii hosted fewest aphids and showed increased activity of superoxide dismutase, implying a defense strategy of resistance towards herbivores. In M. brunneum-inoculated plants, hosting most R. padi, activities of catalase and glutathione reductase were increased suggesting enhanced detoxification responses towards aphids. However, M. brunneum simultaneously increased plant growth indicating that this isolate may cause the plant to tolerate herbivory. EPF seed inoculants may therefore mediate either tolerance or resistance towards biotic stress in plants in an isolate-dependent manner.
KW - Beneficial fungi
KW - Compensatory growth
KW - Endophyte
KW - Plant defense mechanisms
KW - Plant-microbe-insect interactions
U2 - 10.1016/j.jplph.2024.154298
DO - 10.1016/j.jplph.2024.154298
M3 - Journal article
C2 - 38924905
AN - SCOPUS:85196764326
VL - 300
JO - Journal of Plant Physiology
JF - Journal of Plant Physiology
SN - 0176-1617
M1 - 154298
ER -
ID: 396638598