Increasing phosphorus supply is not the mechanism by which arbuscular mycorrhiza increase attractiveness of bean (Vicia faba) to aphids

Babíková, Zděnka; Gilbert, Lucy; Randall, Kate C.; Bruce, Toby J. A.; Pickett, John A.; Johnson, David

doi:10.1093/jxb/eru283

Cited by 36 publications

(33 citation statements)

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“…The indirect effect of AM on herbivore defence has been correlated to changes in the blend of terpenoids that alter plant attractiveness and insect behaviour (Babikova et al, 2014a). In Phaseolus challenged by spider mites, for example, AM symbiosis with Funneliformis mosseae increased the emission of b-ocimene and b-caryophyllene, resulting in increased attraction of predators of spider mites (Schausberger et al, 2012).…”

Section: Role Of Terpenoids In Am-reinforced Resistance Against Herbimentioning

confidence: 99%

“…Formation of AM has been demonstrated to change the concentration and composition of terpenoids (Copetta et al, 2006;Khaosaad et al, 2006;Kapoor et al, 2007;Rapparini et al, 2008). This alters the plant's attractiveness and also the insect's behaviour (Schausberger et al, 2012;Babikova et al, 2014a;Shrivastava et al, 2015). Cascading effects on higher trophic levels have also been reported (Gange et al, 2003), as have indirect effect on predators and parasitoids of herbivores (Gange et al, 2003;Guerrieri et al, 2004;Laird and Addicott, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Terpenoids in plant and arbuscular mycorrhiza-reinforced defence against herbivorous insects

Sharma

Anand

Kapoor

2017

Ann Bot

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Background Plants, though sessile, employ various strategies to defend themselves against herbivorous insects and convey signals of an impending herbivore attack to other plant(s). Strategies include the production of volatiles that include terpenoids and the formation of symbiotic associations with fungi, such as arbuscular mycorrhiza (AM). This constitutes a two-pronged above-ground/below-ground attack-defence strategy against insect herbivores.Scope Terpenoids represent an important constituent of herbivore-induced plant volatiles that deter herbivores and/or attract their predators. Terpenoids serve as airborne signals that can induce defence responses in systemic undamaged parts of the plant and also prime defence responses in neighbouring plants. Colonization of roots by AM fungi is known to influence secondary metabolism in plants; this includes alteration of the concentration and composition of terpenoids, which can boost both direct and indirect plant defence against herbivorous insects. Enhanced nutrient uptake facilitated by AM, changes in plant morphology and physiology and increased transcription levels of certain genes involved in the terpenoid biosynthesis pathway result in alterations in plant terpenoid profiles. The common mycorrhizal networks of external hyphae have added a dimension to the two-pronged plant defence strategy. These act as conduits to transfer defence signals and terpenoids.Conclusion Improved understanding of the roles of terpenoids in plant and AM defences against herbivory and of interplant signalling in natural communities has significant implications for sustainable management of pests in agricultural ecosystems.

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Section: Role Of Terpenoids In Am-reinforced Resistance Against Herbimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Terpenoids in plant and arbuscular mycorrhiza-reinforced defence against herbivorous insects

Sharma

Anand

Kapoor

2017

Ann Bot

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“…Several bacteria from the genus Pseudomonas have been reported as PGP. The most representative and studied species is Pseudomonas fluorescens, which has multiple mechanisms as fluorescence Rainey 2013, Yin et al 2014), phosphate solubilization (Babikova et al 2014) and auxins and gibberellins production (Donati et al 2013, Sauer et al 2013, Colo et al 2014. The same traits have been found in Pseudomonas putida (Ambardar et al 2013, Islam et al 2014.…”

Section: Biochemical Characterizationmentioning

confidence: 99%

ISOLATION AND SCREENING OF BACTERIA FROM Zea mays PLANT GROWTH PROMOTERS

Toribio-Jiménez

Rodríguez-Barrera

Hernández-Flores

et al. 2017

Rev. Int. Contam. Ambie.

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Plant growth promoting rhizobacteria is a beneficial microbe colonizing plant roots, which enhances crop productivity and offers an attractive way to replace chemical fertilizers, pesticides, and supplements. In Mexico, the corn (Zea mays L.) is an important annual gramineae crop with a high volume of global production because of the favorable environmental and socioeconomic situation. In this study the isolation of new strains of bacteria under different environmental conditions will enable further research avenues to better use the capacities of root-colonizing bacteria in agricultural production systems. The strains isolates were analyzed for five plant-growth-promoting attributes: N fixation, solubilization of phosphate, production of auxins, siderophores and gibberellins. The identification of bacterial isolates was determined by biochemical assays and VITEK2 Compact (bioMérieux). A total of 143 morphologically distinct rhizobacteria from corn crops of three communities of Guerrero, Mexico, were isolated, and 54 effective multi trait rhizobacteria were found. It was determined that the bacterial isolates are related to Pseudomonas, Enterobacter, Serratia, Pantoea, Staphylococcus, Klebsiella, Burkholderia, Salmonella, Proteus, Acinetobacter, Citrobacter and Streptoccoccus genus. This collection represents the first bank of multi trait activity in Mexico, and it will contribute to future studies as biomolecules for promoting early emergence and growth of the seeds.Palabras clave: maíz, biofertilizante, rizobacteria, rizosfera 2017 DOI: 10.20937/RICA.2017 J. Toribio-Jiménez et al.Rev. Int. Contam. Ambie. 33 (Especial Biotecnología e ingeniería ambiental) 143-150, 144 RESUMENLas rizobacterias promotoras del crecimiento vegetal, son microorganismos benéficos que colonizan las raíces de las plantas para mejorar la productividad de los cultivos y ofrecen una forma atractiva para reemplazar los fertilizantes químicos, plaguicidas y suplementos. En México, el maíz (Zea mays L) es un importante cultivo de gramínea anual con grandes volúmenes de producción global debido a las condiciones ambientales y socioeconómicas favorables . En este trabajo se aislaron nuevas cepas de bacterias bajo diferentes condiciones ambientales que permitirán investigaciones futuras sobre el uso de las capacidades de las bacterias que colonizan la raíz en los sistemas de producción agrícola. A las cepas aisladas se les analizaron cinco capacidades de promoción del crecimiento vegetal: fijación de nitrógeno, solubilización de fosfatos, producción de auxinas, sideróforos y giberelinas. La identificación de las bacterias aisladas se hizo por pruebas bioquímicas y el sistema VITEK2 (bioMérieux). Un total de 143 rizobacterias morfológicamente distintas se aislaron de cultivos de maíz de tres comunidades de Guerrero, México y se encontraron 54 de ellas con múltiples capacidades. Se determinó que los aislados bacterianos se relacionan con los géneros Pseudomonas, Enterobacter, Serratia, Pantoea, Staphylococcus, Klebsiella, Burkholderia...

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“…In return, mycorrhizal fungi obtain carbon from the plant for use in mycelial growth, which can be 10-20% of plant photosynthate [2]. Mycorrhizal fungal colonisation also induces changes to plant defences through the jasmonic and salicylic acid signalling pathways [4,15], enabling them to achieve compatibility with the plant [16], and the cocktail of volatile organic compounds (VOCs) released from the leaves is also altered [5,13,17,18 ].By contrast to the general beneficial effect on plants of arbuscular mycorrhizal (AM) fungi, infestation by insect herbivores has detrimental effects on the plant (Figure 2), for example aphids drain the plant of nutrients (including C) [19], can infect the plant with pathogens [20] and can reduce plant fitness and biomass [5,13,21]. Insect herbivore attack also induces costly chemical responses in the plant by affecting jasmonic and salicylic acid signalling pathways [23] (these responses can be plant-species specific [24]).…”

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confidence: 99%

Plant-mediated ‘apparent effects’ between mycorrhiza and insect herbivores

Gilbert

Johnson

2015

Current Opinion in Plant Biology

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Plants mediate indirect 'apparent' effects between above-ground herbivores and below-ground mutualistic mycorrhizal fungi. The herbivore-plant-mycorrhiza continuum is further complicated because signals produced by plants in response to herbivores can be transmitted to other plants via shared fungal networks below ground. Insect herbivores, such as aphids, probably affect the functioning of mycorrhizal fungi by changing the supply of recent photosynthate from plants to mycorrhizas, whereas there is evidence that mycorrhizas affect aphid fitness by changing plant signalling pathways, rather than only through improved nutrition. New knowledge of the transfer of signals through fungal networks between plant species means we now need a better understanding of how this process occurs in relation to the feeding preferences of herbivores to shape plant community composition and herbivore behaviour in nature.

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Increasing phosphorus supply is not the mechanism by which arbuscular mycorrhiza increase attractiveness of bean (Vicia faba) to aphids

Abstract: SummaryIncreasing phosphorus supply is not the mechanism by which arbuscular mycorrhiza increase attractiveness of bean, Vicia faba, to aphids.

Cited by 36 publications

References 52 publications

Terpenoids in plant and arbuscular mycorrhiza-reinforced defence against herbivorous insects

Terpenoids in plant and arbuscular mycorrhiza-reinforced defence against herbivorous insects

ISOLATION AND SCREENING OF BACTERIA FROM Zea mays PLANT GROWTH PROMOTERS

Plant-mediated ‘apparent effects’ between mycorrhiza and insect herbivores

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