Root volatile profiles and herbivore preference are mediated by maize domestication, geographic spread, and modern breeding

Helms, Anjel M.; Fontes-Puebla, Ana A; DeWitt, Thomas J.; Kolomiets, Michael V.; Grunseich, John M.

doi:10.1007/s00425-022-04057-0

Cited by 10 publications

(6 citation statements)

References 71 publications

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“…Among the few studies that have quantified phytochemical evenness, there is evidence of variation in evenness of (classes of) compounds between bryophyte species (Peters et al 2019(Peters et al , 2021, differences in cardenolide evenness between wild type and mutant Erysimum cheiranthoides (Mirzaei et al 2020), and differences between maize plant types (Bernal et al 2023). Pais et al (2018) found that an increased evenness of leaf metabolites in Cornus florida was associated with a higher probability of plants being diseased.…”

Section: Phytochemical Evennessmentioning

confidence: 99%

“…Additionally, recent technical advances in plant metabolomics enable the use of new analytical methods (Uthe et al 2021), which will be valuable for future insights. Finally, although most research so far has aimed to answer fundamental ecological questions, a few studies have been done in a more applied context, examining phytochemical diversity for crop species, and its potential importance for protection against pest insects (Whitehead and Poveda 2019, Espinosa-García et al 2021, Robinson et al 2022, Bernal et al 2023). Further research on this topic could increase our understanding of how considerations of chemodiversity could be utilized in agroecosystems (Silva et al 2018, Espinosa-García 2022).…”

Section: Introductionmentioning

confidence: 99%

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Understanding the phytochemical diversity of plants: Quantification, variation and ecological function

Petrén

Anaia

Aragam

et al. 2023

Preprint

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Plants produce a great number of phytochemical compounds mediating a variety of different functions. Recently, phytochemical diversity (chemodiversity), a way which to quantify the complex phenotype formed by sets of phytochemicals, has been suggested to be important for function. However, no study has systematically examined the potential (in)direct functional importance of chemodiversity on a general level, partly due to a lack of an agreement on how to quantify this aspect of the plant phenotype. This paper has four aims: 1) We discuss how chemodiversity (deconstructed into components of richness, evenness and disparity) may quantify different aspects of the phenotype that are ecologically relevant. 2) We systematically review the literature on chemodiversity to examine methodological practices, explore ecological patterns of variability in diversity across different levels of biological organization, and investigate the functional role of this diversity in interactions between plants and other organisms. 3) We provide a framework facilitating decisions on which measure of chemodiversity is best used in different contexts. 4) We outline open questions and avenues for future research in this area. A more thorough understanding of phytochemical diversity will increase our knowledge on the functional role phytochemical compounds, and how they shape ecological interactions between plants and their environment.

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Section: Phytochemical Evennessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Understanding the phytochemical diversity of plants: Quantification, variation and ecological function

Petrén

Anaia

Aragam

et al. 2023

Preprint

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“…Maize production is constantly threatened by abiotic and biotic stressors, including the attack of insect herbivores [ 2 ]. Fall armyworm (FAW, Spodoptera frugiperda ) and western corn rootworm (WCR, Diabrotica virgifera virgifera ) are among the world’s most important maize pests [ 3 , 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Maize OPR2 and LOX10 Mediate Defense against Fall Armyworm and Western Corn Rootworm by Tissue-Specific Regulation of Jasmonic Acid and Ketol Metabolism

Huang,

Grunseich,

Berg-Falloure

et al. 2023

Genes

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Foliage-feeding fall armyworm (FAW; Spodoptera frugiperda) and root-feeding western corn rootworm (WCR; Diabrotica virgifera virgifera) are maize (Zea mays L.) pests that cause significant yield losses. Jasmonic acid (JA) plays a pivotal defense role against insects. 12-oxo-phytodienoic acid (12-OPDA) is converted into JA by peroxisome-localized OPDA reductases (OPR). However, little is known about the physiological functions of cytoplasmic OPRs. Here, we show that disruption of ZmOPR2 reduced wound-induced JA production and defense against FAW while accumulating more JA catabolites. Overexpression of ZmOPR2 in Arabidopsis enhanced JA production and defense against beet armyworm (BAW; Spodoptera exigua). In addition, lox10opr2 double mutants were more susceptible than either single mutant, suggesting that ZmOPR2 and ZmLOX10 uniquely and additively contributed to defense. In contrast to the defensive roles of ZmOPR2 and ZmLOX10 in leaves, single mutants did not display any alteration in root herbivory defense against WCR. Feeding on lox10opr2 double mutants resulted in increased WCR mortality associated with greater herbivory-induced production of insecticidal death acids and ketols. Thus, ZmOPR2 and ZmLOX10 cooperatively inhibit the synthesis of these metabolites during herbivory by WCR. We conclude that ZmOPR2 and ZmLOX10 regulate JA-mediated resistance in leaves against FAW while suppressing insecticidal oxylipin synthesis in roots during WCR infestation.

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“…Comparative studies that examine the consequences of plant domestication on insects that feed on below-ground organs are underrepresented. Only three studies, all in maize, have examined the impact of domestication on below-ground herbivores (Gaillard et al 2018 ; Fontes-Puebla and Bernal 2020 ; Bernal et al 2022 ). Although the results of these studies found that insects tended to perform better on domesticated maize, plant genotype and degree of domestication (modern breeding vs local landraces) had strong effects.…”

Section: Introductionmentioning

confidence: 99%

Consequences of squash (Cucurbita argyrosperma) domestication for plant defence and herbivore interactions

Jaccard

Bustos‐Segura

et al. 2023

Planta

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Main conclusion Cucurbita argyrosperma domestication affected plant defence by downregulating the cucurbitacin synthesis-associated genes. However, tissue-specific suppression of defences made the cultivars less attractive to co-evolved herbivores Diabrotica balteata and Acalymma spp. Abstract Plant domestication reduces the levels of defensive compounds, increasing susceptibility to insects. In squash, the reduction of cucurbitacins has independently occurred several times during domestication. The mechanisms underlying these changes and their consequences for insect herbivores remain unknown. We investigated how Cucurbita argyrosperma domestication has affected plant chemical defence and the interactions with two herbivores, the generalist Diabrotica balteata and the specialist Acalymma spp. Cucurbitacin levels and associated genes in roots and cotyledons in three wild and four domesticated varieties were analysed. Domesticated varieties contained virtually no cucurbitacins in roots and very low amounts in cotyledons. Contrastingly, cucurbitacin synthesis-associated genes were highly expressed in the roots of wild populations. Larvae of both insects strongly preferred to feed on the roots of wild squash, negatively affecting the generalist’s performance but not that of the specialist. Our findings illustrate that domestication results in tissue-specific suppression of chemical defence, making cultivars less attractive to co-evolved herbivores. In the case of squash, this may be driven by the unique role of cucurbitacins in stimulating feeding in chrysomelid beetles.

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Root volatile profiles and herbivore preference are mediated by maize domestication, geographic spread, and modern breeding

Cited by 10 publications

References 71 publications

Understanding the phytochemical diversity of plants: Quantification, variation and ecological function

Understanding the phytochemical diversity of plants: Quantification, variation and ecological function

Maize OPR2 and LOX10 Mediate Defense against Fall Armyworm and Western Corn Rootworm by Tissue-Specific Regulation of Jasmonic Acid and Ketol Metabolism

Consequences of squash (Cucurbita argyrosperma) domestication for plant defence and herbivore interactions

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