Mycorrhizal benefits on plant growth and protection againstSpodoptera exiguadepend on N availability

Ramírez-Serrano, Beatriz; Querejeta, Marina; Minchev, Zhivko; Gamir, Jordi; Perdereau, Elfie; Pozo, Marı́a J.; Dubreuil, Géraldine; Giron, David

doi:10.1080/17429145.2022.2120212

Cited by 13 publications

(6 citation statements)

References 121 publications

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“…These data agree with Harley and who set out that AMF promoted a defense against generalist herbivores, as well as reduction in larval weight (Roger et al, 2013). It has been shown that maize defense compounds such as protease inhibitors and benzoxazinoids are altered by AMF colonization of plant roots that affect weight gain of Lepidoptera larvae (Ramírez-Serrano et al 2022;Stratton et al 2022). Low weight in immature insect stages could affect development time, energy availability for the adult stage, survival, and consequently, greater predation probability by natural enemies.…”

Section: Discussionsupporting

confidence: 89%

ARBUSCULAR MYCORRHIZAL FUNGI INFLUENCE ON GROWTH OF CREOLE MAIZE AND LARVAL DEVELOPMENT OF Spodoptera frugiperda (Lepidoptera:Noctuidae)

Quiñones-Aguilar¹,

Hernández-Hernández²,

Rincón‐Enríquez³

et al. 2023

Trop Subtrop Agroecosyst

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Background: The fall armyworm Spodoptera frugiperda is one of the main pests of maize in Mexico. Its control and management have been performed mainly with pesticides. One of the alternatives is to incorporate arbuscular mycorrhizal fungi (AMF) because of the benefits they provide to plants improving their growth and promoting their defense system against this pest. Objective: Evaluate the effect of AMF in creole maize growth in reducing leaf damage and development of Spodoptera frugiperda larvae. Methodology: In greenhouse conditions, creole maize plants were inoculated with 80 spores of Funneliformis mosseae, Rhizophagus intraradices and without AMF. Height and stem diameter were determined in mycorrhized plants at 15, 30, and 45 days after plant inoculation. After 45 days, plants were infested with three third-instar larvae of S. frugiperda and left to feed for 12 days; fresh weight and cephalic capsule width and size were measured. Once larvae were removed, leaf damage was determined in plants by means of a visual scale, leaf area and mycorrhizal colonization. Results: Root colonization of maize plants by AMF had a significant effect (Tukey’s p ≤ 0.05) in creole maize growth expressed in plant height at 30 days and at 45 days in stem diameter only in plants inoculated with F. mosseae (Tukey’s p ≤ 0.05). Leaf damage by the fall armyworm was similar between inoculated and uninoculated with AMF. Larvae that consumed plant leaves inoculated with R. intraradices showed greater fresh weight compared to those inoculated with F. mosseae. Moreover, width of the cephalic capsule and size were similar between larvae fed with plants inoculated with and without AMF. Implications: The results provide new perspectives and considerations to incorporate AMF in management of fall armyworm in creole maize. Conclusion: These results show that AMF partially promote plant growth of creole maize; leaf damage is similar between plants with and without AMF. Insect weight increased depending on AMF species, which influenced their development.

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Section: Discussionsupporting

confidence: 89%

ARBUSCULAR MYCORRHIZAL FUNGI INFLUENCE ON GROWTH OF CREOLE MAIZE AND LARVAL DEVELOPMENT OF Spodoptera frugiperda (Lepidoptera:Noctuidae)

Quiñones-Aguilar¹,

Hernández-Hernández²,

Rincón‐Enríquez³

et al. 2023

Trop Subtrop Agroecosyst

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“…Culturing and Sanger sequencing revealed that these isolates have high sequence similarity to Enterococcus mundtii (data not shown). Enterococcus is prevalent in Lepidoptera as has been reported in Spodoptera exigua, Galleria mellonella , Lymantria dispar , Helicoverpa armigera , and Heliconius erato ( Broderick et al 2004 , Xiang et al 2006 , Brinkmann et al 2008 , Staudacher et al 2016 , Ramírez-Serrano et al 2022 , Upfold et al 2023 ). Several Enterococcus species have been reported to have functional significance in insects ( Mazumdar et al 2021 , Chen et al 2022 ).…”

Section: Discussionmentioning

confidence: 85%

The effect of diet composition on the diversity of active gut bacteria and on the growth of Spodoptera exigua (Lepidoptera: Noctuidae)

Mugo-Kamiri,

Querejeta,

Raymond

et al. 2024

Journal of Insect Science

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Gut microbiota plays a functional role in nutrition among several insects. However, the situation is unclear in Lepidoptera. Field studies suggest the microbiome may not be stable and is determined by diet, while in the laboratory, Lepidoptera are routinely reared on diet containing antibiotics with unknown effects on microbial communities. Furthermore, molecular approaches for the characterization of lepidopteran microbiomes rarely describe the metabolically active gut bacteria. The aim of this study was to evaluate how diet and antibiotics affect Spodoptera exigua (Hübner) growth and the diversity and activity of the gut bacteria community. We assessed how alfalfa and wheat germ-based diets affected larval growth, in the presence and absence of streptomycin. Alfalfa diet improved larval growth, pupal mass, and survival, but antibiotic was only beneficial in the wheat germ diet. We observed diet-driven changes in the gut bacterial communities. In the active community, the alfalfa colony was dominated by Enterococcus and Rhodococcus whereas in the wheat germ colony, only Enterococcus was present. In contrast, spore-forming Bacilli species were very common members of the DNA community. In both cases, streptomycin had a selective effect on the relative abundance of the taxa present. Our study highlights the importance of characterizing both the diversity and activity of the gut microbiota community. DNA-derived communities may include environmental DNA, spores, or non-viable bacteria, while RNA-derived communities are more likely to give an accurate representation of the diversity of active members that are potentially directly involved in the metabolic processes of the host.

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“…Nevertheless, other nutritional aspects, such as the changes in other micronutrients, and potential variations in the content of sugars and amino acids upon herbivory may have contributed to the resistance phenotype and deserve further attention in follow-up studies. In fact, nutrition related changes, including protein and amino acid contents in mycorrhizal plants, have been proposed to contribute to resistance against S. exigua in maize plants ( Ramírez-Serrano et al, 2022 ). In tomato, significant changes in sugar and amino acid contents occurs in response to herbivory in systemic tomato leaves may contribute to defense ( Kundu et al., 2018 ).…”

Section: Discussionmentioning

confidence: 99%

“…The enhanced growth promotion of mycorrhizal plants under the lowest P fertilization, higher P content in leaves and lower anthocyanin levels suggest that mycorrhizal plants prioritize the improvement in nutrition under P deficiency, but prioritize defense activation under non-deficient conditions. Priming of plant defenses against herbivores has been shown in different systems ( Song et al, 2013 ; Rivero et al, 2021 ; Jiang et al., 2021 ), but a failure of defense priming has been also reported ( Qu et al., 2021 ; Ramírez-Serrano et al, 2022 ; Zeng et al., 2022 ). Analysis of chemical defenses, as the accumulation of polyphenols, lignins and other defensive metabolites in future studies will contribute to better characterize the differences in the defense responses under the different nutrition scenarios.…”

Section: Discussionmentioning

confidence: 99%

Phosphorus availability drives mycorrhiza induced resistance in tomato

et al. 2022

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Arbuscular mycorrhizal (AM) symbiosis can provide multiple benefits to the host plant, including improved nutrition and protection against biotic stress. Mycorrhiza induced resistance (MIR) against pathogens and insect herbivores has been reported in different plant systems, but nutrient availability may influence the outcome of the interaction. Phosphorus (P) is a key nutrient for plants and insects, but also a regulatory factor for AM establishment and functioning. However, little is known about how AM symbiosis and P interact to regulate plant resistance to pests. Here, using the tomato-Funneliformis mosseae mycorrhizal system, we analyzed the effect of moderate differences in P fertilization on plant and pest performance, and on MIR against biotic stressors including the fungal pathogen Botrytis cinerea and the insect herbivore Spodoperta exigua. P fertilization impacted plant nutritional value, plant defenses, disease development and caterpillar survival, but these effects were modulated by the mycorrhizal status of the plant. Enhanced resistance of F. mosseae-inoculated plants against B. cinerea and S. exigua depended on P availability, as no protection was observed under the most P-limiting conditions. MIR was not directly explained by changes in the plant nutritional status nor to basal differences in defense-related phytohormones. Analysis of early plant defense responses to the damage associated molecules oligogalacturonides showed primed transcriptional activation of plant defenses occurring at intermediate P levels, but not under severe P limitation. The results show that P influences mycorrhizal priming of plant defenses and the resulting induced-resistance is dependent on P availability, and suggest that mycorrhiza fine-tunes the plant growth vs defense prioritization depending on P availability. Our results highlight how MIR is context dependent, thus unravel molecular mechanism based on plant defence in will contribute to improve the efficacy of mycorrhizal inoculants in crop protection.

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Mycorrhizal benefits on plant growth and protection againstSpodoptera exiguadepend on N availability

Cited by 13 publications

References 121 publications

ARBUSCULAR MYCORRHIZAL FUNGI INFLUENCE ON GROWTH OF CREOLE MAIZE AND LARVAL DEVELOPMENT OF Spodoptera frugiperda (Lepidoptera:Noctuidae)

ARBUSCULAR MYCORRHIZAL FUNGI INFLUENCE ON GROWTH OF CREOLE MAIZE AND LARVAL DEVELOPMENT OF Spodoptera frugiperda (Lepidoptera:Noctuidae)

The effect of diet composition on the diversity of active gut bacteria and on the growth of Spodoptera exigua (Lepidoptera: Noctuidae)

Phosphorus availability drives mycorrhiza induced resistance in tomato

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