Journal ArticleDOI
Seed inoculation with beneficial rhizobacteria affects European corn borer (Lepidoptera: Pyralidae) oviposition on maize plants
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TLDR
Select PGPR treatments can alter maize plant volatiles with important ramifications for plant‐insect interactions, and is discussed in the context of integrated management of soil health to improve crop resistance to biotic stressors.Abstract:
Larvae of Ostrinia nubilalis (Hübner) cause significant damage to maize ears and reduce market value of fresh sweet corn. Females rely on volatile cues to locate and oviposit preferentially on maize plants. In addition, oviposition behavior of females is influenced by soil management practices as they usually lay more eggs on maize plants grown on conventional soil than on organic soils that harbor rich microbial diversity. Since some plant growth‐promoting rhizobacteria (PGPR) are known to mediate plant health via suppression of soil pathogens and enhanced uptake of nutrients; we hypothesized that inoculation of maize seeds with PGPR will alter emission of maize volatile and reduce the attractiveness of plants to ovipositing O. nubilalis. Plants treated with the single PGPR strain Bacillus pumilus INR‐7, two PGPR mixtures (Blend‐8 or Blend‐9) or untreated plants were presented to O. nubilalis females in oviposition choice bioassays. Headspace volatile organic compounds (VOCs) from the plants were analyzed by gas chromatography–mass spectrometry (GC–MS). Ostrinia nubilalis laid significantly fewer eggs on PGPR‐treated plants compared to untreated plants. In two‐choice oviposition experiments, significantly higher numbers of eggs were laid on untreated plants compared to PGPR‐treated plants. PGPR‐treated plants emitted fewer VOCs than untreated plants which, in part, explains the relatively fewer eggs on PGPR‐treated plants. These results indicate that selected PGPR treatments can alter maize plant volatiles with important ramifications for plant‐insect interactions. The implication of this finding is discussed in the context of integrated management of soil health to improve crop resistance to biotic stressors.read more
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Bacillus velezensis: phylogeny, useful applications, and avenues for exploitation.
TL;DR: Although the intracellular unique biomolecules of Bv strains have been revealed via in silico genome modeling and investigated using transcriptomics and proteomics, a further inquisition into the Bv metabolome using newer technologies such as metabolomics could elucidate additional applications of this economically relevant Bacillus species, beyond that of primarily the agricultural sector.
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Silicon-mediated plant defense against pathogens and insect pests
Waqar Islam,Muhammad Tayyab,Farghama Khalil,Zhang Hua,Zhiqun Huang,Han Y. H. Chen,Han Y. H. Chen +6 more
TL;DR: The article explores the potential in enhancing Si-mediated plant resistance against various economically important diseases and insect pests, further shedding light upon future issues regarding the role of Si in defense against pathogens and Insect pests.
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Sweet Corn Research around the World 2015–2020
TL;DR: This review is a summary of the sweet corn research published during the five years preceding 2021 that results in reduced starch content and increased sugar concentration when consumed fresh.
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The Role of Plant-Associated Microbes in Mediating Host-Plant Selection by Insect Herbivores.
TL;DR: Recent literature is reviewed and synthesized to provide new insights into the ways pathogenic and beneficial plant-associated microbes alter visual, olfactory, and gustatory cues of plants that affect host-plant selection by insect herbivores.
Journal ArticleDOI
Maize responsiveness to Azospirillum brasilense: Insights into genetic control, heterosis and genomic prediction
Miriam Suzane Vidotti,Filipe Inácio Matias,Filipe Couto Alves,Paulino Pérez-Rodríguez,Gregorio Alvarado Beltrán,Juan Burgueño,José Crossa,Roberto Fritsche-Neto +7 more
TL;DR: Heterosis was weakly influenced by the inoculation, and the heterozygosity and N status in the plant can have a role in the benefits that can be obtained from this Plant Growth-Promoting Bacteria (PGPB).
References
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Journal ArticleDOI
The Role of Root Exudates in Rhizosphere Interactions with Plants and Other Organisms
TL;DR: Recent advances in elucidating the role of root exudates in interactions between plant roots and other plants, microbes, and nematodes present in the rhizosphere are described.
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Plant growth-promoting rhizobacteria (PGPR): emergence in agriculture
TL;DR: The progress to date in using the rhizosphere bacteria in a variety of applications related to agricultural improvement along with their mechanism of action with special reference to plant growth-promoting traits are summarized and discussed in this review.
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Rapid phosphatidic acid accumulation in response to low temperature stress in Arabidopsis is generated through diacylglycerol kinase
TL;DR: Evidence is provided that the rapid 32P-PtdOH response was primarily generated through DAG kinase (DGK), and a tentative model illustrating direct cold effects on phospholipid metabolism is presented.
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Induced Systemic Resistance and Promotion of Plant Growth by Bacillus spp.
TL;DR: Two products for commercial agriculture have been developed, one aimed mainly at plant growth promotion for transplanted vegetables and one, which has received registration from the U.S. Environmental Protection Agency, for disease protection on soybean.
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Insect host location: a volatile situation.
TL;DR: Paired or clustered olfactory receptor neurons might enable fine-scale spatio-temporal resolution of the complex signals encountered when ubiquitous compounds are used.