Production of phenolics and the emission of volatile organic compounds by perennial ryegrass (Lolium perenne L.)/Neotyphodium lolii association as a response to infection by Fusarium poae

Pańka, Dariusz; Piesik, Dariusz; Jeske, M.; Baturo‐Cieśniewska, Anna

doi:10.1016/j.jplph.2013.02.009

Cited by 81 publications

(69 citation statements)

References 80 publications

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“…The enhancements of total sugar content, phenolic content, and DPPH-scavenging activity of soybean plants (Table 6) in response to BC+G. geotrichum and G. geotrichum alone support the results of Obledo et al (2003), Huang et al (2007a;2007b), Pańka et al (2013), and Patel et al (2015). During a five-year experiment, Patel et al (2015) reported that continuous organic amendments enhanced produce quality through building and sustaining soil health and productivity.…”

Section: Discussionsupporting

confidence: 67%

Additive effects due to biochar and endophyte application enable soybean to enhance nutrient uptake and modulate nutritional parameters

Waqas

Kim

Khan

et al. 2017

J. Zhejiang Univ. Sci. B

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Abstract:We studied the effects of hardwood-derived biochar (BC) and the phytohormone-producing endophyte Galactomyces geotrichum WLL1 in soybean (Glycine max (L.) Merr.) with respect to basic, macro-and micronutrient uptakes and assimilations, and their subsequent effects on the regulation of functional amino acids, isoflavones, fatty acid composition, total sugar contents, total phenolic contents, and 1,1-diphenyl-2-picrylhydrazyl (DPPH)-scavenging activity. The assimilation of basic nutrients such as nitrogen was up-regulated, leaving carbon, oxygen, and hydrogen unaffected in BC+G. geotrichum-treated soybean plants. In comparison, the uptakes of macro-and micronutrients fluctuated in the individual or co-application of BC and G. geotrichum in soybean plant organs and rhizospheric substrate. Moreover, the same attribute was recorded for the regulation of functional amino acids, isoflavones, fatty acid composition, total sugar contents, total phenolic contents, and DPPH-scavenging activity. Collectively, these results showed that BC+G. geotrichum-treated soybean yielded better results than did the plants treated with individual applications. It was concluded that BC is an additional nutriment source and that the G. geotrichum acts as a plant biostimulating source and the effects of both are additive towards plant growth promotion. Strategies involving the incorporation of BC and endophytic symbiosis may help achieve eco-friendly agricultural production, thus reducing the excessive use of chemical agents.

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Section: Discussionsupporting

confidence: 67%

Additive effects due to biochar and endophyte application enable soybean to enhance nutrient uptake and modulate nutritional parameters

Waqas

Kim

Khan

et al. 2017

J. Zhejiang Univ. Sci. B

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“…For example, hexanoic acid, a molecule with a similar structure to GLVs, has been shown to act as a priming agent in tomato (Solanum lycopersicum) plants against an infection by the necrotrophic fungus Botrytis cinerea, leading to a reduced accumulation of reactive oxygen species in primed plants (Vicedo et al, 2009;Kravchuk et al, 2011;Finiti et al, 2014). Since the GLVs E-2-hexenal (E-2-HAL), Z-3-HOL, E-2-hexenol, and Z-3-HAC also have been reported to be emitted by perennial ryegrass (Lolium perenne) after infection with Fusarium poae (Panka et al, 2013) and by wheat (Triticum aestivum) seedlings after infection with Fusarium graminearum (Piesik et al, 2011), one may speculate that GLVs not only serve as a priming agent against the impending threat of herbivorous insects but rather constitute a general warning and priming mechanism against insects, bacteria, and fungi alike.…”

mentioning

confidence: 99%

Priming of Wheat with the Green Leaf Volatile Z-3-Hexenyl Acetate Enhances Defense against Fusarium graminearum But Boosts Deoxynivalenol Production

Ameye

Audenaert²,

Zutter³

et al. 2015

Plant Physiol.

120

117

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Priming refers to a mechanism whereby plants are sensitized to respond faster and/or more strongly to future pathogen attack. Here, we demonstrate that preexposure to the green leaf volatile Z-3-hexenyl acetate (Z-3-HAC) primed wheat (Triticum aestivum) for enhanced defense against subsequent infection with the hemibiotrophic fungus Fusarium graminearum. Bioassays showed that, after priming with Z-3-HAC, wheat ears accumulated up to 40% fewer necrotic spikelets. Furthermore, leaves of seedlings showed significantly smaller necrotic lesions compared with nonprimed plants, coinciding with strongly reduced fungal growth in planta. Additionally, we found that F. graminearum produced more deoxynivalenol, a mycotoxin, in the primed treatment. Expression analysis of salicylic acid (SA) and jasmonic acid (JA) biosynthesis genes and exogenous methyl salicylate and methyl jasmonate applications showed that plant defense against F. graminearum is sequentially regulated by SA and JA during the early and later stages of infection, respectively. Interestingly, analysis of the effect of Z-3-HAC pretreatment on SA-and JA-responsive gene expression in hormone-treated and pathogen-inoculated seedlings revealed that Z-3-HAC boosts JA-dependent defenses during the necrotrophic infection stage of F. graminearum but suppresses SA-regulated defense during its biotrophic phase. Together, these findings highlight the importance of temporally separated hormone changes in molding plant health and disease and support a scenario whereby the green leaf volatile Z-3-HAC protects wheat against Fusarium head blight by priming for enhanced JA-dependent defenses during the necrotrophic stages of infection.

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“…F. arundinacea), infected with Neotyphodium coenophialum, for instance, emitted less nonanal and (Z)-3-hexen-1-ol acetate but higher amounts of two monoterpenes, while most compounds remained unchanged (Yue et al 2001). A general increase in VOCs was found in L. perenne associated with Neotyphodium lolii (Panka et al 2013), while a decrease in green leaf volatiles and monoterpenes was reported for F. pratensis colonized by N. uncinatum, thus corroborating our results for root VOC emission (Li et al 2014). The only study the authors are aware of that has linked endophyte-mediated changes in VOC emission and herbivore behaviour is on a non-grass system.…”

Section: Discussionmentioning

confidence: 94%

“…While the majority of studies on plant-endophyte-insect relationships have focused on the role of toxic alkaloids (Saikkonen et al 2013), it is clear that the fungus has further-reaching effects on the host's physiology which can also influence interactions with insects (Rasmussen et al 2008b). Endophyteinfected hosts (E+) were shown to differ from non-infected plants (E−) in their primary and secondary metabolism, including the emission of leaf volatile organic compounds (VOCs) that serve multiple ecological functions (Baldwin 2010;Panka et al 2013;Rasmussen et al 2008a).…”

mentioning

confidence: 99%

Aboveground endophyte affects root volatile emission and host plant selection of a belowground insect

2014

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Plants emit specific blends of volatile organic compounds (VOCs) that serve as multitrophic, multifunctional signals. Fungi colonizing aboveground (AG) or belowground (BG) plant structures can modify VOC patterns, thereby altering the information content for AG insects. Whether AG microbes affect the emission of root volatiles and thus influence soil insect behaviour is unknown. The endophytic fungus Neotyphodium uncinatum colonizes the aerial parts of the grass hybrid Festuca pratensis × Lolium perenne and is responsible for the presence of insect-toxic loline alkaloids in shoots and roots. We investigated whether endophyte symbiosis had an effect on the volatile emission of grass roots and if the root herbivore Costelytra zealandica was able to recognize endophyte-infected plants by olfaction. In BG olfactometer assays, larvae of C. zealandica were more strongly attracted to roots of uninfected than endophyte-harbouring grasses. Combined gas chromatography-mass spectrometry and proton transfer reaction-mass spectrometry revealed that endophyte-infected roots emitted less VOCs and more CO2. Our results demonstrate that symbiotic fungi in plants may influence soil insect distribution by changing their behaviour towards root volatiles. The well-known defensive mutualism between grasses and Neotyphodium endophytes could thus go beyond bioactive alkaloids and also confer protection by being chemically less apparent for soil herbivores.

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Production of phenolics and the emission of volatile organic compounds by perennial ryegrass (Lolium perenne L.)/Neotyphodium lolii association as a response to infection by Fusarium poae

Cited by 81 publications

References 80 publications

Additive effects due to biochar and endophyte application enable soybean to enhance nutrient uptake and modulate nutritional parameters

Additive effects due to biochar and endophyte application enable soybean to enhance nutrient uptake and modulate nutritional parameters

Priming of Wheat with the Green Leaf Volatile Z-3-Hexenyl Acetate Enhances Defense against Fusarium graminearum But Boosts Deoxynivalenol Production

Aboveground endophyte affects root volatile emission and host plant selection of a belowground insect

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