How the use of nitrogen fertiliser may switch plant suitability for aphids: the case of Miscanthus, a promising biomass crop, and the aphid pest <i>Rhopalosiphum maidis</i>

Bogaert, Florent; Chesnais, Quentin; Catterou, Manuella; Rambaud, Caroline; Doury, Géraldine; Ameline, Arnaud

doi:10.1002/ps.4505

Cited by 11 publications

(17 citation statements)

References 36 publications

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“…These results were in accordance with findings of other studies with P . australis [ 43 ], Phalaris arundinaceae [ 41 ], and Miscanthus sinensis [ 44 ]. Nutrient addition, such as N, can promote aboveground growth, particularly leaf area expansion [ 42 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of arbuscular mycorrhizal fungi and soil nutrient addition on the growth of Phragmites australis under different drying-rewetting cycles

Jinfeng

Gao

et al. 2018

PLoS ONE

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The frequency of soil drying–rewetting cycles is predicted to increase under future global climate change, and arbuscular mycorrhizal fungi (AMF) are symbiotic with most plants. However, it remains unknown how AMF affect plant growth under different frequencies of soil drying–rewetting cycles. We subjected a clonal wetland plant Phragmites australis to three frequencies of drying-rewetting cycles (1, 2, or 4 cycles), two nutrient treatments (with or without), and two AMF treatments (with or without) for 64 days. AMF promoted the growth of P. australis, especially in the 2 cycles of the drying-rewetting treatment. AMF had a significant positive effect on leaf mass and number of ramets in the 2 cycles of the drying-rewetting treatment with nutrient addition. In the 2 cycles of drying-rewetting treatment without nutrient addition, AMF increased leaf area and decreased belowground to aboveground biomass ratio. These results indicate that AMF may assist P. australis in coping with medium frequency of drying-rewetting cycles, and provide theoretical guidance for predicting how wetland plants respond to future global climate change.

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Section: Discussionmentioning

confidence: 99%

Effects of arbuscular mycorrhizal fungi and soil nutrient addition on the growth of Phragmites australis under different drying-rewetting cycles

Jinfeng

Gao

et al. 2018

PLoS ONE

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“…This suggests that the AMF transfer of N from the patch to the grain, leading to increased grain N concentration, made more N available to the aphid per unit time. This change in concentration ( c. 28% between non‐AMF plants and AMF plants accessing the organic patch) is similar in magnitude to changes in leaf N concentrations of Miscanthus species in which altering N regimes impacted aphid performance (Bogaert et al, ). However, in the present study, aphid number and N status remained unchanged, suggesting that the aphids did not make use of the extra N made available to them by the AMF, and that aphid and plant N status can be uncoupled.…”

Section: Discussionmentioning

confidence: 55%

Section: The Effect Of Direct Amf Access To Nutrients On Aphid Numbmentioning

confidence: 56%

Aphids can acquire the nitrogen delivered to plants by arbuscular mycorrhizal fungi

et al. 2019

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Above‐ and below‐ground organisms can interact by altering the quality of shared host plants. Arbuscular mycorrhizal fungi (AMF) influence plant nutrient uptake, including nitrogen (N) acquisition. Under low N and phosphorus conditions, AMF delivery of N from organic sources not immediately available to the plant can have large impacts on plant N status, a limiting nutrient in the aphid diet. This study investigated the effect of AMF colonisation upon aphid number and determined the consequences of AMF directly accessing an organic nutrient patch that the plant cannot. We hypothesised that AMF colonisation of plants will increase plant and aphid N status, plant performance and aphid number, but only when the AMF had direct access to the added organic patch. Barley plants hosting the grain aphid Sitobion avenae were colonised by the AMF, Funneliformis mosseae, or no AMF. A two‐compartment microcosm was used to separate the plant roots from a 15N‐labelled organic patch in a second compartment. AMF‐colonised plants, but without access to the second compartment, were used to examine the effect of AMF colonisation on aphid number. In a separate treatment, and to determine whether AMF access to a plant inaccessible N source modified the effect of AMF colonisation on aphid number, AMF hyphae were permitted access to the second compartment containing an organic patch. As a control for AMF accessing a larger substrate volume, AMF were allowed access to a second compartment without an organic patch. When the AMF accessed the organic patch, more N from the patch was delivered to the plant resulting in a higher grain N concentration although plant growth was depressed. More N from the patch was also delivered to the aphids, but the N status of the aphid remained unchanged. Regardless of the level of access to the organic patch, AMF colonisation did not affect aphid number. Our data show that by accessing N sources not readily available to plants, AMF can indirectly deliver N to above‐ground organisms, a finding which has major implications for N‐transfer between higher trophic levels. A plain language summary is available for this article.

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“…Nitrogen (N) is an essential macronutrient for plants, playing an important role in defense mechanisms against diseases (Krapp, 2015;Larbat et al, 2016;Bogaert et al, 2017;Roca et al, 2018). Generally, higher amounts of N fertilizer increase plant susceptibility to biotrophic pathogens, while the opposite can occur in necrotrophic pathogens, indicating that there is a complex relationship between N uptake and metabolism as well as disease infection (Fagard et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Transcriptional patterns ofCoffea arabicaL. nitrate reductase, glutamine and asparagine synthetase genes are modulated under nitrogen suppression and coffee leaf rust

Baba

Braghini

Santos

et al. 2020

PeerJ

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This study evaluated the transcriptional profile of genes related to nitrogen (N) assimilation in coffee plants susceptible and resistant to rust fungi under N sufficiency and N suppression. For this purpose, we inoculated young coffee leaves with Hemileia vastatrix uredospores and collected them at 0, 12, 24 and 48 hours post-inoculation (HPI) to evaluate the relative expressions of genes encoding cytosolic glutamine synthetase (CaGS1), plastid glutamine synthetase (CaGS2), nitrate reductase (CaNR), and asparagine synthetase (CaAS). The genes exhibited distinct patterns of transcriptional modulation for the different genotypes and N nutritional regimes. The resistant genotype (I59) presented high levels of transcription in response to pathogen inoculation for CaNR and CaGS1 genes, evaluated under N sufficiency in the initial moments of infection (12 HPI). The gene CaGS1 also showed a peak at 48 HPI. The susceptible genotype (CV99) showed increased transcript rates of CaNR at 12 and 24 HPI in response to rust inoculation. The transcriptional patterns observed for CV99, under N suppression, were high levels for CaAS and CaGS2 at all post-inoculation times in response to coffee leaf rust disease. In addition, CaGS1 was up-regulated at 48 HPI for CV99. Cultivar I59 showed high transcript levels at 12 HPI for CaAS and peaks at 24 and 48 HPI for CaGS2 in inoculated samples. Consequently, total chlorophyl concentration was influenced by N suppression and by rust infection. Regarding enzyme activities in vitro for glutamine synthetase and CaNR, there was an increase in infected coffee leaves (I59) and under N sufficiency. Moreover, CV99 was modulated in both N nutritional regimes for GS activity in response to rust. Our results indicate that N transport genes trigger a differential modulation between genotypes through the action of rust disease.

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How the use of nitrogen fertiliser may switch plant suitability for aphids: the case of Miscanthus, a promising biomass crop, and the aphid pest Rhopalosiphum maidis

Cited by 11 publications

References 36 publications

Effects of arbuscular mycorrhizal fungi and soil nutrient addition on the growth of Phragmites australis under different drying-rewetting cycles

Effects of arbuscular mycorrhizal fungi and soil nutrient addition on the growth of Phragmites australis under different drying-rewetting cycles

Aphids can acquire the nitrogen delivered to plants by arbuscular mycorrhizal fungi

Transcriptional patterns ofCoffea arabicaL. nitrate reductase, glutamine and asparagine synthetase genes are modulated under nitrogen suppression and coffee leaf rust

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