Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids

Ziaja D, Müller C (2023)
Frontiers in Plant Science 14: 1145918.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Some plant species express an extraordinarily high intraspecific diversity in phytochemicals (= chemodiversity). As discussed for biodiversity, higher chemodiversity may provide better protection against environmental stress, including herbivory. However, little is known about whether the resistance of a plant individual towards herbivores is mostly governed by its own chemodiversity or by associational resistance provided by conspecific neighbours. To investigate the role of chemodiversity in plant-aphid interactions, we used the AsteraceaeTanacetum vulgare, whose individuals differ pronouncedly in the composition of leaf terpenoids, forming distinct chemotypes. Plants were set up in a field consisting of plots containing five individuals of either the same or different chemotypes. Presence of winged aphids, indicating attraction, and abundance of winged and unwinged aphids, indicating fitness, were counted weekly on each plant. During the peak abundance of aphids, leaf samples were taken from all plants for re-analyses of the terpenoid composition and quantification of terpenoid chemodiversity, calculated on an individual plant (Shannon index, Hsind, also considered as α-chemodiversity) and plot level (Hsplot, = β-chemodiversity). Aphid attraction was neither influenced by chemotype nor plot-type. The real-time odour environment may be very complex in this setting, impeding clear preferences. In contrast, the abundance was affected by both chemotype and plot-type. On average, moreUroleucon tanacetiaphids were found on plants of two of the chemotypes growing in homogenous compared to heterogenous plots, supporting the associational resistance hypothesis. ForMacrosiphoniella tanacetariaaphids, the probability of presence differed between plot-types on one chemotype. Terpenoid chemodiversity expressed as a gradient revealed negative Hsploteffects onU. tanaceti, but a positive correlation of HsindwithM. tanacetariaabundance. Aphids ofM. fuscoviridewere not affected by any level of chemodiversity. In conclusion, this study shows that not only the chemotype and chemodiversity of individual plants but also that of conspecific neighbours can influence certain plant-herbivore interactions. These effects are highly specific with regard to the plant chemotype and differ between aphid species and their morphs (winged vs. unwinged). Furthermore, our results highlight the importance of analysing chemodiversity at different levels.
Stichworte
associational resistance; aphid attraction; aphid abundance; common garden experiment; common tansy; plant-herbivore interactions; terpenoids
Erscheinungsjahr
2023
Zeitschriftentitel
Frontiers in Plant Science
Band
14
Art.-Nr.
1145918
eISSN
1664-462X
Page URI
https://pub.uni-bielefeld.de/record/2978061

Zitieren

Ziaja D, Müller C. Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids. Frontiers in Plant Science. 2023;14: 1145918.
Ziaja, D., & Müller, C. (2023). Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids. Frontiers in Plant Science, 14, 1145918. https://doi.org/10.3389/fpls.2023.1145918
Ziaja, Dominik, and Müller, Caroline. 2023. “Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids”. Frontiers in Plant Science 14: 1145918.
Ziaja, D., and Müller, C. (2023). Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids. Frontiers in Plant Science 14:1145918.
Ziaja, D., & Müller, C., 2023. Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids. Frontiers in Plant Science, 14: 1145918.
D. Ziaja and C. Müller, “Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids”, Frontiers in Plant Science, vol. 14, 2023, : 1145918.
Ziaja, D., Müller, C.: Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids. Frontiers in Plant Science. 14, : 1145918 (2023).
Ziaja, Dominik, and Müller, Caroline. “Intraspecific chemodiversity provides plant individual- and neighbourhood-mediated associational resistance towards aphids”. Frontiers in Plant Science 14 (2023): 1145918.
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2023-05-25T10:16:37Z
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