Plant growth-promoting Bacillus suppress Brevicoryne brassicae field infestation and trigger density-dependent and density-independent natural enemy responses

Gadhave, Kiran R.; Finch, Paul; Gibson, Trevor; Gange, Alan C.

doi:10.1007/s10340-015-0721-8

Cited by 36 publications

(49 citation statements)

References 38 publications

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“…Effects on third trophic level (i.e. natural enemies) have been reported in other microorganism-plant associations, such as those with mycorrhizal fungi (Gange et al 2003;Guerrieri et al 2004;Hempel et al 2009), plant growth-promoting rhizobacteria (PGPR) (D'Alessandro et al 2014;Gadhave et al 2016) and other fungal endophytes in grass (Bultman et al 1997(Bultman et al , 2012de Sassi et al 2006;Härri et al 2008).…”

Section: Introductionmentioning

confidence: 97%

Bottom-up effects of endophytic Beauveria bassiana on multitrophic interactions between the cotton aphid, Aphis gossypii, and its natural enemies in melon

et al. 2019

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Entomopathogenic fungi are now known to have an endophytic capacity that induces a wide range of changes in the composition of plant nutrients and/or defensive compounds. These changes could influence interactions between the plant and higher trophic levels. In this study, we evaluated the predation/parasitism efficacy of larvae of the lacewing, Chrysoperla carnea, and the braconid parasitoid, Aphidius colemani, when offered aphids that had been challenged by the entomopathogenic fungus Beauveria bassiana. Aphids were either inoculated directly with a fungal suspension (lacewing bioassay only) or had been feeding on melon plants endophytically colonized by B. bassiana. Our results indicate that B. bassiana application did not significantly influence the number of aphid prey consumed by lacewings, or the time took them to consume each aphid. In a choice bioassay, C. carnea larvae preferred to feed on aphids reared on B. bassiana-colonized plants compared with control plants. In another choice assay, the number of aphids parasitized by A. colemani and their sex ratio were not influenced by whether the aphids had been feeding on B. bassiana-colonized plants or not. Our findings support the hypothesis that endophytic entomopathogenic fungi can be used in combination with other natural enemies, such as predators and parasitoids, in Integrated Pest Management programmes.

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Section: Introductionmentioning

confidence: 97%

Bottom-up effects of endophytic Beauveria bassiana on multitrophic interactions between the cotton aphid, Aphis gossypii, and its natural enemies in melon

et al. 2019

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“…All interactions (n = 17) revealed from the literature search were negative for the aboveground herbivore, regardless of the insect feeding guild (Figure 2A, Supplementary Table 1 , Zehnder et al, 1997;Commare et al, 2002;Saravanakumar et al, 2008;Gadhave et al, 2016). For instance, the addition of four different Pseudomonas fluorescens strains (individually, as well as in mixtures) to rice fields in India resulted in a ∼3 fold reduction of leaf rolling by the rice leaf roller Cnaphalocrocis medialis (Commare et al, 2002;Saravanakumar et al, 2008).…”

Section: The Effect Of Plant Growth-promoting Rhizobacteria On Abovegmentioning

confidence: 98%

“…Inoculation with PGPR can also influence the performance or attraction of insects at higher trophic levels, such as predatory insects or parasitoids (Saravanakumar et al, 2008;Gadhave et al, 2016). It is difficult to elucidate clear patterns as from all interactions (n = 18), 50% reported negative effects while 44% of the studies reported positive effects (Figure 2A, Supplementary Table 1).…”

Section: The Effect Of Plant Growth-promoting Rhizobacteria On Abovegmentioning

confidence: 99%

“…For example, a study investigating the effects of inoculation with Bacillus spp. on field-grown broccoli (B. oleracea) reported consistently reduced numbers of the ladybug (Coccinella septempunctata) and various unidentified syrphid flies on plants that received bacterial inoculations, compared to control plants that did not receive additional bacteria (Gadhave et al, 2016). However, in the same study, the authors found that the percentage of cabbage aphids (B. brassicae) parasitized by the parasitoid wasp Diaraetiella rapae was two to three times higher in plants grown on soils treated with Bacillus cereus and B. subtilis, but not in those treated with B. amyloliquefasciens or a mixture of the species (Gadhave et al, 2016).…”

Section: The Effect Of Plant Growth-promoting Rhizobacteria On Abovegmentioning

confidence: 99%

“…Various organisms, most notably plant growth promoting rhizobacteria (PGPR) and arbuscular mycorrhizal fungi (AMF), can boost plant growth (e.g., Saravanakumar et al, 2008;Gadhave et al, 2016), which has been hypothesized to increase plant palatability (i.e., the plant vigor hypothesis; Price, 1991;Cornelissen et al, 2008). On the other hand, plants under biotic or abiotic stress can also be more vulnerable to attack by herbivores (i.e., the plant stress hypothesis; White, 1969).…”

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confidence: 99%

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Effects of Soil Organisms on Aboveground Plant-Insect Interactions in the Field: Patterns, Mechanisms and the Role of Methodology

et al. 2018

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Soil biota-plant interactions play a dominant role in terrestrial ecosystems. Through nutrient mineralization and mutualistic or antagonistic interactions with plants soil biota can affect plant performance and physiology and via this affect plant-associated aboveground insects. There is a large body of work in this field that has already been synthesized in various review papers. However, most of the studies have been carried out under highly controlled laboratory or greenhouse conditions. Here, we review studies that manipulate soil organisms of four dominant taxa (i.e., bacteria, fungi, nematodes, and soil arthropods) in the field and assess the effects on the growth of plants and interactions with associated aboveground insects. We show that soil organisms play an important role in shaping plant-insect interactions in the field and that general patterns can be found for some taxa. Plant growth-promoting rhizobacteria generally have negative effects on herbivore performance or abundance, most likely through priming of defenses in the host plant. Addition of arbuscular mycorrhizal fungi (AMF) has positive effects on sap sucking herbivores, which is likely due to positive effects of AMF on nutrient levels in the phloem. The majority of AMF effects on chewers were neutral but when present, AMF effects were positive for specialist and negative for generalist chewing herbivores. AMF addition has negative effects on natural enemies in the field, suggesting that AMF may affect plant attractiveness for natural enemies, e.g., through volatile profiles. Alternatively, AMF may affect the quality of prey or host insects mediated by plant quality, which may in turn affect the performance and density of natural enemies. Nematodes negatively affect the performance of sap sucking herbivores (generally through phloem quality) but have no effect on chewing herbivores. For soil arthropods there are no clear patterns yet. We further show that the methodology used plays an important role in influencing the outcomes of field studies. Studies using potted plants in the field and studies that remove target soil taxa by means of pesticides are most likely to detect significant results. Lastly, we discuss suggestions for future research that could increase our understanding of soil biota-plant-insect interactions in the field.

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Impact of Biofertilizers on Horticultural Crops

Wong

Teh

2021

Biofertilizers

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Plant growth-promoting Bacillus suppress Brevicoryne brassicae field infestation and trigger density-dependent and density-independent natural enemy responses

Cited by 36 publications

References 38 publications

Bottom-up effects of endophytic Beauveria bassiana on multitrophic interactions between the cotton aphid, Aphis gossypii, and its natural enemies in melon

Bottom-up effects of endophytic Beauveria bassiana on multitrophic interactions between the cotton aphid, Aphis gossypii, and its natural enemies in melon

Effects of Soil Organisms on Aboveground Plant-Insect Interactions in the Field: Patterns, Mechanisms and the Role of Methodology

Impact of Biofertilizers on Horticultural Crops

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